COMSPHERE 3550 Series Data Service Units Models 3550 and 3551 User’s Guide Document No.
COMSPHERE 3550 Series Data Service Units Models 3550 and 3551 User’s Guide Document No.
COMSPHERE 3550 Series Data Service Units COMSPHERE Model 3550 and 3551 Data Service Units User’s Guide 3550-A2-GB20-10 2nd Edition (February 1995) Changes and enhancements to the product and to the information herein will be documented and issued as a new release. A customer opinion card is provided at the front of this publication and your comments are appreciated. If the form has been removed, address comments to AT&T Paradyne Corporation, Technical Publications, 8545 126th Ave. N., P.O.
Safety Instructions Important Safety Instructions 1. Read and follow all warning notices and instructions marked on the product or included in the manual. 2. This product is intended to be used with a three-wire grounding type plug – a plug which has a grounding pin. This is a safety feature. Equipment grounding is vital to ensure safe operation. Do not defeat the purpose of the grounding type plug by modifying the plug or using an adaptor.
COMSPHERE 3550 Series Data Service Units Notices
Safety Instructions Government Requirements The Federal Communications Commission (FCC) requires that instructions pertaining to connection to the telephone network be included in the installation and operation manual. Specific instructions are listed in this section. Notice to Users of the Digital Data Service This equipment complies with Part 68 of the FCC rules.
COMSPHERE 3550 Series Data Service Units The DDS Service Order Number is 6.0Y. The jack configurations required are RJ48S for the Model 3550 DSU and RJ48T for the Model 3551. With an RJ48T configuration, you must specify the number of data lines you require. Refer to the Technical Specifications section of Chapter 1 for V.32 DBM jack information. After the telephone company has installed the requested jack, you can connect the DSU with the appropriate cable (provided).
Table of Contents Preface About This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . How to Use This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reference Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3550 Series Data Service Units 4. Operating the DSU Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DCP and SDCP Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Status Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Backup Branch . . . . . . . . . . . . . . .
Table of Contents List of Figures Figure Page 2-1 2-2 2-3 2-4 2-5 2-6 2-7 3-1 3-2 3-3 3-4 3-5 4-1 4-2 4-3 D-1 D-2 D-3 2-3 2-4 2-6 2-6 2-7 2-9 2-10 3-3 3-5 3-6 3-7 3-10 4-2 4-3 4-9 D-1 D-2 D-4 D-5 D-6 E-1 E-2 3550-A2-GB20-10 Model 3550 Hardware Switch Location (shown without a TDM/Flex) . . . . . . . . . . Model 3550 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model 3550 DSU NMS Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3550 Series Data Service Units List of Tables Table 1-1 1-2 1-3 1-4 2-1 2-2 3-1 3-2 4-1 4-2 4-3 4-4 4-5 4-6 4-7 5-1 5-2 5-3 5-4 5-5 5-6 5-7 5-8 5-9 5-10 5-11 5-12 5-13 5-14 iv Page General Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DSU Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V.32 DBM Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Table C-1 C-2 C-3 C-4 C-5 C-6 C-7 C-8 C-9 C-10 D-1 D-2 D-3 D-4 D-5 D-6 3550-A2-GB20-10 Page DSU Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SDCP Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Device Health and Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Expanded Health and Status Messages . . . . . . . . .
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Preface About This Guide Chapter 3 Provides step-by-step instructions for installing your carrier-mounted Model 3551 DSU. Chapter 4 Describes how to operate your DSU and its DBM and TDM/Flex options. Chapter 5 Presents the basics of setting and changing configuration options, and provides Configuration Option Set Tables, which describe each configuration option in an option set, along with its possible settings. Appendix A Provides a diagram for navigating the DSU’s menu structure.
COMSPHERE 3550 Series Data Service Units Related Documents Reference Documents Other product documentation includes the following: • AT&T Technical Reference 41458 3000-A2-GA31 COMSPHERE 3000 Series Carrier, Installation Manual • AT&T Technical Reference 61330 3000-A2-GB41 COMSPHERE – 48 Vdc Central Office Power Unit, Installation Guide • Bell Canada DCTE Specifications 6700-A2-GB41 6700-A2-GY31 • AT&T Technical Reference 62310 – 1987 COMSPHERE 6700 Series Network Management System, User’s Gui
About Your DSU Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V.32 DBM . . . . . . . . . . . . . .
COMSPHERE 3550 Series Data Service Units • Diagnostic Control Panel control. The Model 3550 DSU is controlled from its diagnostic control panel (DCP). The diagnostic control panel for the Model 3551 DSU, called a shared diagnostic control panel (SDCP), is installed in the 3000 Series Carrier. Both control panels display information about the DSU on a 2-line, 16-character liquid crystal display (LCD) and through light-emitting diode (LED) status indicators.
About Your DSU • Switched-carrier emulation. In 2-port TDM/Flex transmission, switched-carrier emulation is optional for each port, for both the inbound (toward the control DSU) and outbound (from the tributary DSU) directions. 2-Port TDM/Flex The 2-port TDM/Flex is a separate circuit card that attaches to the Model 3550 DSU. It allows independent ports to share one standard digital point-to-point facility. The 2-port TDM/Flex provides the following features: • NMS control.
COMSPHERE 3550 Series Data Service Units Table 1-1 (1 of 2) General Technical Specifications Specifications Criteria APPROVALS FCC Part 15 Class A digital device FCC Part 68 AW292J-61661-DD-N UL 3550 DSU 3551 DSU, 3000 Series Carrier Listed U L 1950, second edition Recognized Component UL 1950, second edition CSA Safety 3550 DSU 3551 DSU, 3000 Series Carrier Certified CSA 22.2, No. 950-M89 Certified Component CSA 22.2, No. 950-M89 Emissions CSA 108.
About Your DSU Table 1-1 (2 of 2) General Technical Specifications Specifications Criteria HEAT DISSIPATION (MAX.) AT 115 VAC 3550 DSU 22.16 Btu/hr 3550 DSU with DBM 29.00 Btu/hr 3550 DSU with 2-Port TDM/Flex 29.21 Btu/hr 3551 DSU 22.16 Btu/hr 3551 DSU with DBM 27.30 Btu/hr 3000 Series Carrier (16 DSUs with DBMs plus SDU and fan module) 563.00 Btu/hr PORT RATES Async or Sync rates: 64, 56, 48, 19.2, 14.4, 12.0, 9.6, 4.8, 2.4, and 1.2 kbps Other asynchronous rates (e.g.
COMSPHERE 3550 Series Data Service Units Table 1-2 DSU Technical Specifications Criteria Specifications APPLICATION Full- or half-duplex data transmission via point-to-point or multipoint DDS network, or local area data channel COMMUNICATION LINE Leased or private 4-wire DDS line DATA RATES Digital Services (DDS, ASDS) 2.4, 4.8, 9.6, 19.2, 38.4, and 56 kbps LADS 2.4, 4.8, 9.6, 19.2, 38.4, 56, and 64 kbps When timing is external (provided by the DTE), the DTE’s clock must be within these ranges.
About Your DSU Table 1-3 V.32 DBM Technical Specifications Criteria Specifications RINGER EQUIVALENCE NUMBER (REN) DBM option 0.7B APPLICATION Full- or half-duplex data transmission via analog 2-wire dial network, point-to-point MODULATION AND FREQUENCY At 14.4 and 12 kbps: CCITT V.32bis, 1800 Hz At 4.8 and 9.6 kbps: CCITT V.32, 1800 Hz At 2.4 kbps: CCITT V.22bis, 2400 Hz COMMUNICATION LINE 2-wire analog (PSTN) line DATA RATES 2.4, 4.8, 9.6, 12, 14.
COMSPHERE 3550 Series Data Service Units Table 1-4 2-Port TDM/Flex Technical Specifications Criteria Specifications APPLICATION Multiplexing Provides time division multiplexing of two independent ports. Digital sharing Allows consecutive ports to share the same TDM/Flex channel. PORT SYNCHRONOUS RATES 1.2, 2.4, 4.8, 9.6, 12.0, 14.4, 19.2, 48, 56, and 64 kbps PORT ASYNCHRONOUS RATES 150, 300, 600, 1200, and 1800 bps plus all primary (DSU) rates. Asynchronous rates support +2.3, –2.
About Your DSU Out of Warranty Enhanced Support Services If your equipment is out of warranty and you do not have a maintenance support agreement, factory repair support is available. In addition to the customer support described, AT&T Paradyne offers a wide variety of enhanced customer support programs that are designed to meet our customers needs. Our high quality support programs range from equipment installation to premium on-site support, as well as network management.
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Installing the Model 3550 DSU Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . How to Change Hardware Straps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Where to Place the DSU . . . . . .
COMSPHERE 3550 Series Data Service Units circuit must be capable of supplying a minimum of 2 amperes at 115 Vac. Refer to the Technical Specifications section in Chapter 1 for additional power requirements. CAUTION The ac transformer contains a 3-wire grounding-type plug which has a grounding pin. This is a safety feature. Do not defeat the purpose of the grounding plug by modifying it or by using an adapter.
Installing the Model 3550 DSU Figure 2-1. Model 3550 Hardware Switch Location (shown without a TDM/Flex) Table 2-1 Model 3550 DSU Switch Settings Switch Position Switch Setting S1-1 S1 1 ON (default) S1 2 S1-2 Function Permissive V.32 DBM transmit output level of –9 dBm Off Programmable V.
COMSPHERE 3550 Series Data Service Units Where to Place the DSU Installing the DSU As mentioned earlier, the DSU must be placed within 6 feet of a dedicated grounded ac outlet that is protected by a circuit breaker. Before installing the DSU, label the circuit breaker that protects the ac wall outlet, and make sure that it is set to ON. Then, proceed with the installation. The distance between the DSU and its DTE must be within EIA-232-D/V.24 limits, or V.
Installing the Model 3550 DSU Power-Up Routine key to bring the factory-loaded unit 6. Press the configurations into view, and select the appropriate configuration. When power is applied, the DSU: • Determines what options (DBM or TDM/Flex) are installed, if any. • PTPC for a point-to-point control • Runs a Device Test on itself and each of the installed options.
COMSPHERE 3550 Series Data Service Units Connecting to the NMS Connecting to the Dial (or PSTN) Network A 3600 Hubbing Device is required to connect the control DSU to the 6700 Series NMS. When connected to the NMS, the DSU can be controlled and configured from the NMS rather than from the DCP alone. If your DSU is equipped with a V.32 DBM, refer to Figure 2-4 as you follow these steps. . . 1. Plug either end of the dial (analog) interface cable into the DSU jack labeled BACKUP. Procedure 1.
Installing the Model 3550 DSU Connecting to the DDS (or LADS) Network If connecting the DSU to a LADS network, there are distance limitations that govern the use of DSUs on the network. Table 2-2 summarizes these limitations. NOTE Before connecting the DSU to the DDS network, ensure that approved primary protectors have been installed on the circuit in accordance with Article 800 of the National Electric Code, NFPA 70, in the United States and Section 60 of the Canadian Electric Code, Part 1, in Canada.
COMSPHERE 3550 Series Data Service Units Table 2-2 LADS Connection Distances Wire Gauge (AWG) Data Rate (kbps) 19 22 24 26 2.4 20.0 mi 16.6 mi 12.7 mi 9.4 mi (32.2 km) (26.7 km) (20.5 km) (15.1 km) 4.8 9.6 19.2 1 38.4 56 64 1 19.4 mi 12.7 mi 9.6 mi 7.1 mi (31.2 km) (20.5 km) (15.4 km) (11.5 km) 15.2 mi 9.7 mi 7.3 mi 5.6 mi (24.5 km) (15.6 km) (11.7 km) (9.0 km) 11.8 mi 7.5 mi 5.7 mi 4.2 mi (19.0 km) (12.1 km) (9.2 km) (6.8 km) 11.2 mi 6.5 mi 4.6 mi 3.
Installing the Model 3550 DSU Tributary DSU Addressing Tributary DSU addresses are user-definable, but take care that their addresses are unique on a multipoint circuit. If two tributaries are assigned the same address, you will not be able to communicate with either one. The control DSU accesses its tributary by specifying the tributary’s address. first addresses the control, then the tributary.
COMSPHERE 3550 Series Data Service Units Connecting the DSU to a DTE . The DSU’s rear panel has both a 25-pin EIA-232-D/ V.24 connector and a 34-pin CCITT V.35 connector (used for higher operating speeds). You can use either interface. When the unit is equipped with a TDM/Flex, either of these interfaces can be used as Port 1. The TDM/Flex provides an additional interface to be used as Port 2. This is a D-type connector. If the port is to operate at a speed greater than 19.2 kbps, use the V.
Installing the Model 3550 DSU Connecting Port 2 3. Select Stat (Status branch). 4. Press the For the EIA-232 cable, install as described above. 5. Select ID. For the V.35 cable, install the V.35 Interconnect Cable, then the V.35 DTE cable as follows (refer to Figure 2-7). . key until ID appears. 6. Press the Procedure key until Network Addr appears. 7. Verify that the correct address has been entered. 1. Reconfigure the port to match the interface, V.35 in this example.
COMSPHERE 3550 Series Data Service Units Verifying DBM Operation Other Tests If a DBM is installed, test the tributary DBM for dial tone, and verify that the DSU can place and receive calls. The following lists the tests available on your DSU. Refer to the Test Branch section of Chapter 4 for further test information, as well as more detail on how to configure and operate the DSU. Refer to Appendix A to determine how best to access each test. . Procedure 1. Select Bckup (F2).
Installing the Model 3551 DSU Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . How to Change Hardware Straps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installing the DSU . . . . . . . .
COMSPHERE 3550 Series Data Service Units Before You Begin The COMSPHERE 3000 Series Carrier should already be installed properly and be operational, with a functioning shared diagnostic control panel (SDCP). An SDCP (installed in the carrier) is required for installation and maintenance of the Model 3551 DSU. For installation information, see the COMSPHERE 3000 Series Carrier, Installation Manual.
Installing the Model 3551 DSU Figure 3-1. Model 3551 DSU Switch and Jumper Locations Table 3-1 Model 3551 DSU Switch Settings Switch Position Switch Setting ON (default) Function Permissive V.32 DBM transmit output level of –9 dBm S1-1 S1 2 S1-2 Off Programmable V.32 DBM transmit level between –12 dBm and 0 dBm ON Frame ground (FG) connected to signal ground (SG) Off (default) FG connected to SG through 100 ohm resistor ON is to the rear as you face the front of the DSU. Off is to the front.
COMSPHERE 3550 Series Data Service Units Table 3-2 Model 3551 DSU Jumper Straps Strap Designation State of Jumper Strap J12 Left Function V.35 Test Mode Indication: Left — Enables V.35 Test Mode Indication (Pins 1 and 2). This is the factory default. Right — Disables V.35 Test Mode Indication (Pins 2 and 3). J13 Left EIA-232-D Test Mode Indication: Left — Enables EIA-232-D Test Mode Indication (Pins 1 and 2). This is the factory default.
Installing the Model 3551 DSU . Installing the DSU The initial installation procedure for the Model 3551 DSU requires the installation of a rear connector plate onto the rear of the COMSPHERE 3000 Series Carrier (Figure 3-2). After the initial installation, the DSU can be installed or de-installed by simply removing the DSU from the carrier. Procedure 1. At the rear of the carrier, set the tab on the rear connector plate into one of the slotted grooves on the carrier’s backplane.
COMSPHERE 3550 Series Data Service Units 4. Using a Phillips screwdriver, loosen the screw holding the circuit pack lock and rotate the lock to the open position (Figure 3-3). Open the latch. 5. At the front of the carrier, hold the DSU vertically with the latch on its faceplate in the open position. Then, insert the circuit card into the top and bottom circuit card guides for the slot that contains the rear connector plate.
Installing the Model 3551 DSU 7. At the rear of the carrier, connect the appropriate DTE interface cable (EIA-232-D or V.35) to the rear connector plate. For an EIA-232-D interface cable, connect the EIA-232-D cable to the top DTE connector on the rear connector plate. For the 25-pin V.35 interface, a V.35 interconnect cable is shipped with the unit. To connect a V.35 interface cable to the 25-pin V.35 connector, refer to Figure 3-4 and perform the following steps: a. Connect the 25-pin end of the DSU’s V.
COMSPHERE 3550 Series Data Service Units Power-Up Routine 7. Press the F1 key to SAVE the selected configuration. When power is applied, the DSU: The Save to screen appears. • Determines what options (DBM or TDM/Flex) are installed, if any. 8. Save the selected configuration to Activ (F1 key). • Runs a Device Test on itself and each of the installed options. key to return to the top-level menu, 9. Press the then select Local again.
Installing the Model 3551 DSU Connecting to the DDS (or LADS) Network Each DSU can be configured to use either interface (EIA-232 or V.35) independent of other DSUs in the carrier. Connection of the DSU to the DTE is a matter of selecting and installing the appropriate cable. Refer to the COMSPHERE 3000 Series Carrier, Installation Manual for installation procedures.
COMSPHERE 3550 Series Data Service Units Tributary DSU Addressing Tributary DSU addresses are user-definable, but take care to ensure that their addresses are unique on a multipoint circuit. If two tributaries are assigned the same address, you will not be able to communicate with either one. The control DSU accesses its tributary by specifying the tributary’s address. The 6700 Series NMS accesses the DSU via its network address.
Installing the Model 3551 DSU To Connect the SDCP to a DSU 2. Press the Select key on the SDCP again. The SDCP accesses the DSU in Carrier 1, Slot 1. The top-level menu (your starting point) of the carrier-mounted DSU is displayed. For the carrier-mounted Model 3551 DSU, the SDCP must first be reconnected to the DSU. Once connected, the SDCP operates like a DCP. . Procedure 1: 01 A DSU Local Remot 1. Press the Select key (refer to Figure 3-2). A screen similar to the following appears.
COMSPHERE 3550 Series Data Service Units Other Tests The following lists the tests available on your DSU. Refer to the Test Branch section of Chapter 4 for further test information, as well as more detail on how to configure and operate the DSU. Refer to Appendix A to determine how best to access each test.
Operating the DSU Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DCP and SDCP Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Menu Structure . . . . . . . . . . . . .
COMSPHERE 3550 Series Data Service Units Control Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmitter Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External Leads . .
Operating the DSU Figure 4-2. SDCP and Model 3551 DSU Faceplate Both control panels have a 2-line, 16-character liquid crystal display (LCD) and a keypad, through which you can • Monitor the unit’s health and status Refer to Appendix C to understand the meaning of DCP status indicators.
COMSPHERE 3550 Series Data Service Units Status Branch F1 F2 F3 • The key returns you to the top-level menu, and terminates any work in progress. key returns you to the previous display, • The one level up from the current display. It can also be used to terminate a data entry display without making a change. and keys scroll menus or other • The displays to the left or right, respectively.
Operating the DSU Expanded Health and Status Circuit Quality Expanded Health and Status (Expan) only appears during automatic dialing. It retrieves Health and Status information for the local DSU after an automatic backup attempt has failed, or when there is a disconnect after a successful connection. Circuit Quality (CircQ) shows the level and quality of the signal being received from the network by the DBM. This subbranch is only available for a V.32 DBM.
COMSPHERE 3550 Series Data Service Units Table 4-1 Identity Descriptions Information Displayed Description Model: 3550 or 3551. S#: Unit serial number. DSU SW ver: Software/firmware version residing on DSU. Netwrk Addr: Unit’s network address. DSU Rate: Value set for DSU Rate(Kbps) configuration option. DBM Rate: Value set for DBM Rate(Kbps) configuration option; the DBM’s aggregate speed. It only appears when a V.32 DBM is installed. MUX Card: 2Prt – Type of TDM/Flex installed.
Operating the DSU • TriesTimeOut – Specify the overall time limit during which a DBM will automatically attempt to establish a dial backup call: from 1 to 60 minutes (the default is 15 minutes). Auto Bckup must be enabled. If the tributary DSU is to initiate the call, set the control for Cllbk and the tributary for Pswrd. External DBU Option Set (This option set will not appear if a DBM is installed.): • ExtBU – Select whether the external DBU will answer or place backup calls.
COMSPHERE 3550 Series Data Service Units Table 4-2 Backup Branch Menu Selections Current Backup Mode Backup Command Idle Bkup Dial out, establish, and switch to dialed link (Dial Backup mode). Dial Dial out and establish dialed link (Standby mode). (Data is routed over the DDS circuit.) Disc Disconnect dialed link (Idle mode). →Dial Switch data to dialed link (Dial Backup mode). DrBU Disconnect dialed link and switch to private line (Idle mode). →DDS Switch data to DDS (Standby mode).
Operating the DSU Test Branch NOTE The Test branch provides extensive testing capabilities for the DSU, the DDS circuit, the DBM (if installed), and the backup circuit. When the tributary DSU receives a test request from the control DSU, it aborts any locally initiated test in progress. Running a test can affect your application data or may cause your application session to be dropped depending upon front-end processor, time-out parameters, etc.
COMSPHERE 3550 Series Data Service Units point-to-point or multipoint network, whereas a tributary DSU can originate Remote Digital Loopback in a point-to-point network only. NOTE To issue a Local Loopback to a tributary DSU, the DSU must have a DBM installed or a Conflict w/ Environ message will appear. The DBM is required to call the tributary and abort the Local Loopback.
Operating the DSU To view the results of the test, select Displ (Display) key to scroll through the results shown and press the in Table 4-4. Table 4-3 Digital Test Results Results Information Displayed When the test is over, the top line displays Final instead of Active. Time: Running test timer. (The Clr selection resets the timer to 0:00:00.) Tot Error: Running count of bits in error; Max, if the maximum error count has been reached, the maximum being 64000.
COMSPHERE 3550 Series Data Service Units Configuration Branch Table 4-5 Bit Error Rate Test Results Results Information Displayed Time: Running test timer. (The Clr selection resets the timer to 0:00:00.) Tot Error: Running count of bits in error; Max, if the maximum error count has been reached, which is 64000. (The Clr selection resets the counter to 0.) Err Secs: Running count of errored seconds. Errored second is at least one error is detected during a 1-second time period.
Operating the DSU 6. Select the mode: NOTE • Enable Full Mode (F2) – All configuration options will be displayed. By referencing the menu in Appendix A, you will see that pressing the key is more efficient if the unit is to operate on a multipoint circuit. • Disable Full Mode (F3) – Only those configuration options likely to change will be displayed. When the selection is made, it is displayed on the first line of the LCD (e.g., Full Mode: Disab). 4.
COMSPHERE 3550 Series Data Service Units Reconfiguring a TDM/Flex Port 5. Select Save (F1). The Save to screen appears. The Connecting the DSU to a DTE section of Chapter 2 tells you how to connect Port 2 if your DSU is equipped with a TDM/Flex. 6. Select Activ (F1). The selected application’s configuration is saved to the DSU’s Active operating area, and the Command Complete message appears.
Operating the DSU Changing the Poll List 16. Select SAVE (F1). 17. Save to Activ (F1). . To change the poll list (e.g., add network address 3): Command Complete appears to confirm that the configuration is saved. Procedure 1. Select Chang (F3). Poll List Chng Poll List: Activ Delet Skip The Poll List (PList) subbranch maintains or changes the DSU’s poll list. A control DSU’s poll list includes all tributary DSUs and DBMs one level downstream. You can display, clear, change, or acquire a poll list.
COMSPHERE 3550 Series Data Service Units . To delete a network address (e.g., 3) from the poll list: Acquiring the Poll List . Procedure To automatically generate a poll list: Chng Poll List: Activ Delet Skip F1 F2 Procedure Poll List: Displ Clr F3 F1 F2 Chang F3 1. Select Delet (F2). 1. Press the Address: F1 F2 3 Enter key to display Acq. Poll List: Acq Displ F3 F1 F2 Clr F3 2. Select Enter (F3). In this example, 3 was just added, so it is the address displayed.
Operating the DSU Directory The DSU’s dial backup Directory (Dir) can store up to ten telephone numbers (dial strings) so the DBM can call other DBMs or modems. Directory entries are numbered from 1 to 10. Each dial string in the directory can be up to 36 characters in length. Refer to Table 4-6 for numbers and characters that can be used. When the dial string or changes are complete, enter an underscore ( _ ) to the immediate right of the last character; this ends the dial string field.
COMSPHERE 3550 Series Data Service Units 10. Press the screen. Network Address key to return to the Enter Dir 11. Press the F3 key to Save the entry. 12. Verify that the number was loaded by pressing the key again and selecting Load (F2). The telephone number should appear as entered, or you can repeat the procedure to edit/correct your entry.
Operating the DSU LEDs 6. Select Save (F2). The DSU displays the address assigned along with a Command Complete message. . If an error was made in entering the address: Procedure 1. Press the screen. key to return to the Configure External Leads 2. Re-select Addr, and re-edit the address. The External Leads (ExtL) selection allows you to display the state of four general-purpose leads on the EIA-232-D/V.
COMSPHERE 3550 Series Data Service Units Table 4-7 Lead States Meaning Symbol Off (below text line) ON (above text line) Changing ? Indicates an illegal value NOTES: Input leads A and B: Off ( ON ( ) when voltage on lead is less than +.8V. ) when voltage on lead is more than +2.2V. Output leads are either ON or Off: When output is set to Off ( When output is set to ON ( ), –12V is applied to lead. ), +12V is applied to lead. .
Configuring the Unit Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using the DCP to Set Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Editing Configuration Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Saving Configuration Options . . . . . . . . . . . . . . . .
COMSPHERE 3550 Series Data Service Units Once loaded, the following Edit/Save submenu appears: Edit / Save: SAVE DSU F1 F2 4. Select storage area (Activ, Remt, Usr1, etc.) from the Load from screen. If the unit is a control and you select Remt, enter the network address of the remote DSU. DBM 5. Select the option set (e.g., DSU, Diag, DBM) to be edited. F3 The first configuration option within that set appears.
Configuring the Unit . Saving Configuration Options Procedure Press the DCP keys indicated by the shading. CAUTION Port 1 Local Be extremely careful when saving configuration options to avoid saving them to the wrong location. . F1 To save edited configuration options: DSU 9.6 C Remot F2 Local Mode: Stat Bckup Procedure 1. From any configuration option in any option set, key to return to the Edit/Save press the submenu. 2. Press the F1 key below SAVE. F1 F2 Local Mode: Bckup Test 3.
COMSPHERE 3550 Series Data Service Units Edit / Save: SAVE DSU F1 F2 Edit / Save: Diag DBM Diag F3 F1 Chang Diag Opts: DSU DBM Gen F1 F2 F2 F3 F1 F2 F1 F3 F2 Edit / Save: SAVE DSU F1 F2 Edit / Save: DSU Diag F1 5-4 F2 F2 Edit / Save: SAVE DSU F1 F3 Chang Diag Opts: DSU DBM Gen F1 F2 F3 DTE Port: V.35 Next EIA232 V.35 Diag Type: NonD Next NonD Disr F1 F3 DTE Port: EIA232 Next EIA232 V.
Configuring the Unit Port 1 Local F1 • MUX (Setup) Configuration Options (Table 5-10) DSU 9.6 T Remot F2 • MUX (Port) Configuration Options (Table 5-11) • Port Speed (DSU) Configuration Options for DSU (Table 5-12) F3 • Port Speed (DBM) Configuration Options (Table 5-13) This example is now complete.
COMSPHERE 3550 Series Data Service Units Table 5-1 (1 of 2) DSU Configuration Options Rate(Kbps): 9.6 Next 64L 56 38.4 19.2 9.6 4.8 2.4 Prev DSU Rate. Sets the data rate (in kbps) of the DSU, which must be set to match the speed of the digital (DDS) circuit. 64L — 56 to — 2.4 kbps Select for 64 kbps LADS operation. Set to match the speed of the DDS circuit. NOTE: Both the control and tributary DSUs must be set to the same value. PrtSp(Kbps): 9.6 Next 64 56 48 19.2 9.6 4.8 2.4 1.
Configuring the Unit Table 5-1 (2 of 2) DSU Configuration Options RxElasStor: Disab Next Enab Disab Prev Receive Elastic Store (only displayed when Full Mode is enabled). The DSU receives data using a receive data buffer on the DSU’s received data (RXD) lead. This configuration option only supports single-port DSUs configured for disruptive diagnostics (Diag Type is set to Disr) and no rate adaption – when Rate(Kbps) is equal to PrtSp(Kbps).
COMSPHERE 3550 Series Data Service Units Table 5-2 Diagnostic (DSU) Configuration Options Diag Type: Disr Next NonD Disr Mixed None Prev Diagnostic Type. This configuration option defines the diagnostic interaction between control and tributary DSUs. All DSUs on the same circuit should be set the same (e.g., if the control is set to NonD, all its tributaries should also be set to NonD).
Configuring the Unit Table 5-3 Diagnostic (DBM) Configuration Options Diag Type: Disr Next NonD Disr Mixed None Prev Diagnostic Type. This configuration option defines the diagnostic interaction between control and tributary DSUs that are in backup. All DSUs on the same circuit should be set the same (e.g., if the control is set to NonD, all its tributaries should also be set to NonD).
COMSPHERE 3550 Series Data Service Units Table 5-4 Diagnostic (External DBU) Configuration Options Diag Type: Disr Next Disr None Prev Diagnostic Type. This configuration option defines the diagnostic interaction between control and tributary DSUs that are in backup using an external dial backup unit (DBU). All DSUs on the same circuit should be set the same (e.g., if the control is set to Disr, all its tributaries should also be set to Disr).
Configuring the Unit Table 5-5 (2 of 2) Diagnostic (General) Configuration Options TribTimOut: 0:10 Next Chang Prev Tributary Time-out, specified in minutes and seconds (only displayed when any Diag Type is set to NonD or Mixed, LinkConfig is set to M-Pt, and Full Mode is enabled).
COMSPHERE 3550 Series Data Service Units Table 5-6 (1 of 4) DBM Configuration Options Rate(Kbps): 9.6 Next 14.4 12.0 9.6 4.8 2.4 Prev DBM Rate. Sets the initial data rate (in kbps) of the DBM for backup calls over the dial circuit. 14.4 to — 4.8 kbps Select the data rate for V.32bis modulation. The rate 14.4 is not displayed if you have a 12.0 kbps DBM. 2.4 Select for V.22bis modulation. — PrtSp(Kbps): 9.6 Next 14.4 12.0 9.6 4.8 2.4 1.
Configuring the Unit Table 5-6 (2 of 4) DBM Configuration Options Single Rate: Yes Next Yes No Prev Single Rate (only displayed when Full Mode is enabled). Determines whether the DBM will adjust its rate to resolve a rate mismatch with a remote DBM or modem with the following limitations. NOTE: If the DBM Rate(Kbps) is set to 2.4, the DBM will only train at 2.4 kbps and can only talk to a 2.4 kbps modem, regardless of how Single Rate is set.
COMSPHERE 3550 Series Data Service Units Table 5-6 (3 of 4) DBM Configuration Options Call Setup:None Next None Pswrd Cllbk Alarm Prev Dial Backup Call Setup (only displayed when Full Mode is enabled). Establishes the level of security for call setup attempts. This configuration option prevents an invalid call from causing the DSU to switch data to the DBM. None — Select for outgoing calls when no security is needed.
Configuring the Unit Table 5-6 (4 of 4) DBM Configuration Options V.13 Signl: Enab for MPTC and MPTT; Disab for other configurations Next Enab Disab Prev V.13 Signaling (only displayed when Full Mode is enabled). V.13 signaling applies to the DBM when the DBM is in Dial Backup mode. The normal RTS/CTS delay is 14 ms at 2.4 kbps and 11 ms at all other speeds when V.13 is enabled. It is under 2 ms when V.13 is disabled. For the V.
COMSPHERE 3550 Series Data Service Units Table 5-7 External DBU Configuration Options ExtBU: None Next Ansr Orig None Prev External Backup Unit. This feature allows dial backup for a DSU using an external dial backup unit (DBU). Ansr — Select for the external DBU to answer an incoming dial backup call. Orig — Select for the external DBU to originate dial backup. Only when the external DBU is set to Orig will the Backup option set be available. The external DBU must be set for Dial on DTR.
Configuring the Unit Table 5-8 (1 of 4) General Configuration Options DTE Port: EIA232 Next EIA232 V.35 Prev DTE Port (not displayed when a TDM/Flex is installed and enabled). Selects the active DTE interface. EIA232 — Select when using the EIA-232 interface (connector). EIA232 operation is recommended for speeds 19.2 kbps or below. Operation at speeds up to 56 kbps is dependent upon cable length, cable quality, and the local environment. V.35 Select when using the V.35 interface (connector).
COMSPHERE 3550 Series Data Service Units Table 5-8 (2 of 4) General Configuration Options LSD Lead: Std Next Std Delay FrcOn Prev Line Signal Detect Lead (only displayed when Full Mode is enabled). Controls behavior of the LSD lead. Std — Select standard so that the LSD lead goes Off when a control mode idle (CMI) signal is received from the DDS network, or there is a DDS failure. Delay — Select only if you do not want the DSU to respond to a network alarm condition or CMI signal.
Configuring the Unit Table 5-8 (3 of 4) General Configuration Options LL by DTE: Disab Next Enab Disab Prev Local Loopback by DTE (only displayed when Full Mode is enabled). Controls the use of Pin 18 of the EIA-232-D/V.24 interface or Pin L of the V.35 interface by the DTE to initiate a Local Loopback when the DSU is the active device. Whenever this lead is ON, the Local Loopback overrides any other diagnostic tests run by the network.
COMSPHERE 3550 Series Data Service Units Table 5-8 (4 of 4) General Configuration Options DTR Alarm: Disab Next Enab Disab Prev Data Terminal Ready Alarm (only displayed when Full Mode is enabled, and a TDM/Flex is not installed). Causes the DSU to generate an alarm if DTR is Off for more than 30 seconds. The DCP displays DTR Alarm and reports the alarm to the NMS. Enab — Select if the DSU should generate an alarm when DTR is turned Off for 30 seconds.
Configuring the Unit Table 5-9 (1 of 2) Backup Configuration Options Auto Bckup:Disab Next Enab Disab Prev Automatic Backup (only displayed when a DBM is installed, or an external DBU is configured to originate backup). Controls automatic initiation of a call setup attempt to a remote DBM or modem when there is a failure of the DDS network. (Automatic dial attempts begin after the Network Time-out expires.) Enab — Select to initiate backup when there is a failure of the DDS network.
COMSPHERE 3550 Series Data Service Units Table 5-9 (2 of 2) Backup Configuration Options RestorTimOut: 5m Next Chang Prev Restoration Time-out (only displayed when Full Mode is enabled). Specifies the length of time the DDS network must be back in service before automatic restoration is attempted. (Auto Restor must be enabled.) Chang — Select to enter or change the current setting (range of 1 to 60 minutes).
Configuring the Unit Table 5-10 MUX (Setup) Configuration Options MUX Funct: Disab for MPTC; Enab for all other configurations Next Enab Disab Prev TDM/Flex Function. Enables or disables the TDM/Flex. Enab — Select when you want to enable the TDM/Flex and perform multiplexing. Disab — Select when you want to disable the TDM/Flex. Share DevA: Enab MPTT; Disab for all other configurations Next Enab Disab Prev Sharing Device A.
COMSPHERE 3550 Series Data Service Units Table 5-11 (2 of 4) MUX (Port) Configuration Options* Async Rate: =Sync Next =Sync 1800 1200 600 300 150 Prev Asynchronous Rate. Specifies the rate of an asynchronous port. The asynchronous rate must be less than or equal to the synchronous data rate of the port. Set the synchronous data rate for a port via the Port Speed (PrtSp) configuration submenu. This configuration option is displayed only if Async→Sync is enabled.
Configuring the Unit Table 5-11 (3 of 4) MUX (Port) Configuration Options* TxCarrSel: Const Next Const Cntrl Prev Transmitter Carrier Select (only displayed when Full Mode is enabled). Enables the TDM/Flex transmitter circuitry to simulate switched-carrier operation (using the V.13 codes) on an individual channel. Simulated switched-carrier operation is also referred to as pseudo-controlled carrier (PCC) mode.
COMSPHERE 3550 Series Data Service Units Table 5-11 (4 of 4) MUX (Port) Configuration Options* Elast Stor: Disab Next Enab Disab Prev Elastic Store (only displayed when Full Mode is enabled). Elastic Store hardware consists of a transmit buffer (register). Serial data from the extended circuit is clocked into the DSU elastic store using a clock provided by the extended circuit received clock lead. The DSU uses its own system timing to clock data out of the buffer.
Configuring the Unit Table 5-12 Port Speed (DSU) Configuration Options Prt1( 9.6): 9.6 Next 64 56 48 19.2 9.6 4.8 2.4 1.2 Disab Prev Port 1 Speed. Primary data rate in kbps on Port 1. (Must be set to the same value in the remote DSU.) 64 to — 1.2 kbps Select to set the port’s operating rate. Disab Select to disable the port.
COMSPHERE 3550 Series Data Service Units Table 5-13 Port Speed (DBM) Configuration Options Prt1( 9.6): 9.6 Next 14.4 56 12.0 9.6 4.8 2.4 1.2 Disab Prev Port 1 Speed. Primary data rate in kbps on Port 1. (Must be set to the same value in the remote DBM.) 14.4 to — 1.2 kbps Select to set the port’s operating rate. Disab Select to disable the port.
Configuring the Unit Table 5-14 Port Speed (External DBU) Configuration Options Prt1( 9.6): 9.6 Next 64 56 48 28.8 19.2 14.4 9.6 4.8 2.4 1.2 Disab Prev Port 1 Speed. Primary data rate in kbps on Port 1. (Must be set to the same value in the external DBU.) 64 to — 1.2 kbps Select to set the port’s operating rate. Disab Select to disable the port.
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DSU Menu Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Top-Level Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Local/Remote Menu Subbranches . . . . . . . . .
COMSPHERE 3550 Series Data Service Units A-2 February 1995 3550-A2-GB20-10
DSU Menu 3550-A2-GB20-10 February 1995 A-3
COMSPHERE 3550 Series Data Service Units Continued from Page A-1. NOTE If the Test branch does not appear, the DSU is in Display mode (values can be read, but not changed). Press a function key to select one of the following branches: • Local branch Only authorized persons can change configuration option values for the DSU. Contact your System Administrator for further information. • Remote branch – Only available to a DSU configured as a control or a point-to-point tributary.
Configuration Worksheets B Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1 Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1 Overview Instructions Configuration Worksheets summarize the DSU’s software configuration options and the selections that can be set for each.
Enab, Disab Enab, Disab Enab, Disab + 6, 0, –10 Enab, Disab Msg Clamp TxElasStor RxElasStor 19.2 PowrLvl V.54 Lpbk Diag Type Disr, None Value 100, 400, 800, 1200, 1600 2nd Ch(bps) Diagnostic (External DBU) NonD, Disr, Mixed, None Diag Type Value 100, 400, 800, 1200, 1600 2nd Ch(bps) Diagnostic (DBM) NonD, Disr, Mixed, None Diag Type Value Int, Ext, Prt1, Prt2, DDS TxClkSource Diagnostic (DSU) 64, 56, 48, 19.2, 9.6, 4.8, 2.4, 1.2, Disab PrtSp(Kbps) Value 64L, 56, 38.4, 19.2, 9.
min and TriesTimeOut (Chang) Enab, Disab Enab, Disab Host, DSD MUX Funct Share DevA Port Cntrl MUX (Setup) 10 9 8 7 6 Value DSR on Tst 4 Disab, Prt1, Prt2 Underspeed 64, 56, 48, 28.8, 19.2, 14.4, 9.6, 4.8, 2.4, 1.2, Disab 64, 56, 48, 28.8, 19.2, 14.4, 9.6, 4.8, 2.4, 1.2, Disab Disab, Prt1, Prt2 Prt1 (xx.x) Prt2 (xx.x) Underspeed Value 14.4, 12.0, 19.2, 9.6, 4.8, 2.4, 1.2, Disab Prt2 (xx.x) Port Speed (External DBU) 14.4, 56, 12.0, 9.6, 4.8, 2.4, 1.2, Disab Prt1 (xx.
Cntrl, Trib Pt-Pt, M-Pt LinkConfig Disr, None Value Value NonD, Disr, Mixed, None Value NonD, Disr, Mixed, None Position Diagnostic (General) Diag Type Diagnostic (External DBU) Diag Type Diagnostic (DBM) Diag Type Value Int, Ext, DDS, Prt1, Prt2 TxClkSource Diagnostic (DSU) 64, 56, 48, 19.,2, 9.6, 4.8, 2.4, 1.2, Disab PrtSp(Kbps) Value 64L, 56, 38.4, 19.2, 9.6, 4.8, 2.4 DSU Rate(Kbps) Full Mode Value 1, 2 1.0, 2.3 Stop Bits Overspeed 14.4, 12.0, 9.6, 4.8, 2.4 14.4, 12.0, 9.
Enab, Disab Host, DSD Share DevA Port Cntrl Permissive, Programmable Connected, Disconnected Enalbed, Disabled Frame Ground/ Signal Ground Test Mode indication Value Value DDS Interface Hardware Straps Enab, Disab MUX (Setup) MUX Funct 1.25, 2.5 FrcOn, DTE Overspeed RTS Cntrl Disab, Prt1, Prt2 Underspeed Disab, Prt1, Prt2 Underspeed 64, 56, 48, 28.8, 19.2, 14.4, 9.6, 4.8, 2.4, 1.2, Disab 64, 56, 48, 28.8, 19.2, 14.4, 9.6, 4.8, 2.4, 1.2, Disab Disab, Prt1, Prt2 Prt1 (xx.x) Prt2 (xx.
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Status Indicators and Control Panel Messages Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Control Panel Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Format .
COMSPHERE 3550 Series Data Service Units Table C-1 DSU Status Indicators Label OK Color Green Description Health and status indicator: DSU operation is normal. (The DSU has not detected any of the faults listed under Alrm, below.) This indicator flashes two times per second if a message from the NMS is present. Alrm Red Health and status indicator: There is a fault in the local or remote DSU, DBM, or DDS facility, or there is a corrupted configuration.
Status Indicators and Control Panel Messages Format Control Panel Messages This section shows the screen format of messages appearing on the control panel and describes the various messages. The format of the control panel messages is shown below. Command Name Message Three types of messages are included: health and status, progress, and error messages. F1 F2 F3 Health and Status Messages There are three types of health and status messages.
COMSPHERE 3550 Series Data Service Units Table C-3 (2 of 3) Device Health and Status Messages Message Condition Dial Tone:Fail Dial tone test was enabled and test failed. DDS F: alarm Digital facility alarm; alarm is one of the following network alarms: BiplrViol Fac Alarm OutofServc No Signal — Excessive Bipolar Violations — Facility Alarm — Out-of-Service condition — No signal has been received DSU:Device Fail Internal failure in the DSU is detected. (Go to the Test branch for Device Test.
Status Indicators and Control Panel Messages Table C-3 (3 of 3) Device Health and Status Messages Message Condition MUX Device Fail Internal failure in the TDM/Flex is detected. MUX CommunicFail No reply from TDM/Flex. The DSU periodically polls the TDM/Flex for health and status. When the DSU does not receive a response, the message MUX CommunicFail appears in the Health and Status report. Prtnnn Disable Transmitter at port nnn (01 or 02, or All is disabled.
COMSPHERE 3550 Series Data Service Units Table C-4 Expanded Health and Status Messages Message Condition Dial Attempt:nn The number (nn) of failures of dialing attempts since failure of private-line service. This message is cleared when the automatic backup process succeeds or the backup process is reset due to configuration option changes. When the maximum number of retries has been reached, Max appears. Drop:DTR Disc An established dialed connection fails because the DTR lead was turned Off.
Status Indicators and Control Panel Messages Table C-5 Subnetwork Health and Status Messages Message Condition Devic TDM/Flex only: Device Failure. One of the following major alarms is in effect: Configuration Corrupt Device Test Failure MUX Device Failure DialBU Dial BackUp mode. Indicates that the DBM is active. DialCN Dial Connect. Indicates that the DBM is in Standby mode. DialTn Dial Tone Test failure. Disab Indicates that the DSU, DBM, or Port nn is disabled. DTR DTE alarm.
COMSPHERE 3550 Series Data Service Units Progress Messages Table C-6 describes the command progress messages, and Table C-7 describes the dial backup progress messages. Message Table C-6 Command Progress Messages Condition Please wait . . . Command is taking more than 2 seconds to complete. Command Complete Command has been completed. Command Failed Command was unable to be executed. Table C-7 Dial Backup Progress Messages Message Condition DBM:Answering DBM is answering an incoming call.
Status Indicators and Control Panel Messages Error Messages Table C-8 describes the command error messages, Table C-9 describes the dial backup error messages, and Table C-10 describes the TDM/Flex error messages. Table C-8 Command Error Messages Message Conflict w/Envir Condition Command conflicts with a test in progress, or the configuration is inappropriate for this command, etc. Action 1. Check for a test in progress. 2. Either wait for the test to finish or abort the test. 3.
COMSPHERE 3550 Series Data Service Units Table C-9 Dial Backup Error Messages Notify NMS1 Condition Action DBM: Busy Yes Telephone line associated with remote DBM is busy. Try again. Try another number if possible, or investigate why the line is busy. DBM: Call Aborted No Call was aborted from the DCP. None DBM:Callbck Fail No There was a failure to connect on a callback attempt. DBM: Conflict w/Envir Yes DBM is not able to dial out (e.g., test is being run); there is no DBM at the far end.
Status Indicators and Control Panel Messages Table C-10 (1 of 3) TDM/Flex Error Messages Message All Async >Aggr Condition Action All ports of the TDM/Flex are configured for asynchronous operation and their combined corresponding synchronous rate exceeds the value for the DSU, DBM, or ExtBU Rate(Kbps) configuration option.
COMSPHERE 3550 Series Data Service Units Table C-10 (2 of 3) TDM/Flex Error Messages Message Invalid timing No 1.2 @ 56K,64K Condition Action A TDM/Flex port (Prt1 or Prt2) was previously selected as the source of external timing when the TDM/Flex was enabled. Now, the TDM/Flex is enabled. Set TxClkSource to any of the valid timing sources (external timing is set to Ext for the DSU (or ExtBU) and/or the DBM).
Status Indicators and Control Panel Messages Table C-10 (3 of 3) TDM/Flex Error Messages Message Sync >Async Req Condition The port’s asynchronous rate setting requires that more capacity (bandwidth) be allocated to the port. Action Allocate more capacity (bandwidth) to the port; that is, set the port rate to a higher speed via the PrtSp submenu. Asynchronous rates of 150, 300, 600, and 1200 bps require the allocation of 1200 bps.
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Pin Assignments D Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1 Overview Pin assignments for the 3550 Series DSU connectors and interfaces are included here. Refer to them as needed. Figure D-1 shows the Model 3550 DSU’s digital network connector, which is used for DDS connection; Table D-1 provides its pin assignments. Table D-2 provides the network connector pin assignments used for the V.
COMSPHERE 3550 Series Data Service Units Table D-1 Model 3550 – Digital (DDS) Network 8-Pin Cable Connector Pin Assignments Pin Circuit Function 1 R1 Transmit data to local loop 2 T1 Transmit data to local loop 7 T Received data from local loop 8 R Received data from local loop Table D-2 Model 3550 – Dial (Analog) Network 6-Pin Cable Connector Pin Assignments Pin Circuit Function 3 T Tip – V.32 DBM 4 R Ring – V.32 DBM Figure D-2.
Pin Assignments Table D-3 3600 Hubbing Device Pin Assignments Pin # Signal Name Input/Output 1 +5 Vdc Input 2 DCOSD/CCIRD Input 3 Signal Ground Ground 4 DCORD/CCISD Output Table D-4 3600 Hubbing Device CC IN/DC OUT Jack Pin Assignments Signal Name Pin # In/Out CC IN DC OUT 1 –V Pass-Through — N/C N/C 2 DCOCTS/CCIRTS IN RTS CTS 3 DCORTS/CCICTS OUT CTS RTS 4 DCOSD/CCIRD OUT RD SD 5 Signal Ground — GND GND 6 DCORD/CCISD IN SD RD 7 N/C — N/C N/C 8 +V Pass
COMSPHERE 3550 Series Data Service Units Figure D-3. Model 3551 DSU 25-Pin EIA-232/25-Pin V.
Pin Assignments Table D-5 EIA-232/V.
COMSPHERE 3550 Series Data Service Units Figure D-4. V.
Pin Assignments Table D-6 V.35 Connector Pin Assignments 25-Pin Connector (Rear Connector Plate) 34-Pin Connector (V.
COMSPHERE 3550 Series Data Service Units Figure D-5.
Pin Assignments Figure D-6. V.
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Application Configurations E Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1 Point-to-Point Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1 Multipoint Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3550 Series Data Service Units Figure E-1. Point-to-Point Application Configurations with Internal and External V.
Application Configurations Multipoint Applications Model 3550 and Model 3551 DSUs also provide high-speed multipoint circuit support. The network can be controlled from the DSU’s control panel or a 6700 Series NMS. Figure E-2 shows sample multipoint configurations. Using this application, backup is provided via modems rather than a DBM. In this case, a matrix switch at the control site switches data from the FEP ports to the modems.
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Equipment List F Feature/Part No. G = Factory Install. F = Field Install. Comcode 3550-A1-001 107330029 3550-A1-002 3550-A1-003 107330037 107330045 3551-B1-001 3551-B1-002 107330052 107330060 3550-F1-201 3550-F1-202 107329922 107329930 3550-G1-201 107329955 Rear Connector Plate – 25-Pin EIA-232/25-Pin V.35 3000-F1-021 106476229 V.35 Interconnect Cable (For V.
COMSPHERE 3550 Series Data Service Units Feature/Part No. G = Factory Install. F = Field Install. Comcode Telephone Cord 6-pin modular RJ11C/Permissive Plug 7i — 4400-F1-531 14i — 3600-F3-503 25i — 4400-F1-533 106472913 107331357 106472921 Telephone Cord 8-pin Modular RJ45S/Programmable Plug 2.
Equipment List Equipment* Part Number AT&T Paradyne Field Service Spares For Model 3550 DSU 2-Port TDM/Flex 870-1858-8001 870-1871-8001 For Model 3551 DSU 870-1859-8001 For Model 3550/3551 V.32 bis14.4 kbps DBM DBM Core Line-Interface 102-0144-0031 870-1571-8000 Rear Connector Plate – 25-Pin EIA-232/25-Pin V.35 869-2211-0011 V.35 Interconnect Cable (For V.
COMSPHERE 3550 Series Data Service Units Equipment* Part Number Model 3550 Digital (DDS) Network Interface Cable – RJ48S Network Cable (14i cord included with 3550) 14i — 035-0267-1431 25i — 035-0267-2531 8-pin to 6-pin Modular Cable (Model 3550 in Canada) 7i — 035-0279-0031 Model 3550 Dial (PSTN) Interface Cable Telephone Cord 6-pin Modular RJ11C/Permissive PSTN Plug – D4BU 7i — 035-0274-0731 14i — 035-0266-1431 25i — 035-0274-2531 Telephone Cord 8-pin Modular RJ45S/Programmable PSTN Plug – D8W 2
Glossary active core The core that is transmitting data. For example, the DBM is the active core when the unit is in Backup mode. Advanced Diagnostic protocol (ADp) The network management protocol used by the COMSPHERE 6700 Series NMS. It provides diagnostic communication for the network. auto backup A function of the dial backup module (DBM), an external dial backup unit (DBU), or a carrier-mounted dial backup unit.
COMSPHERE 3550 Series Data Service Units CCITT The International Consultative Committee for Telegraphy and Telephony, a committee of the International Telecommunication Union (ITU). clamping A function of the DSU that forces the output signal to go low (Off) and causes the DSU to ignore input signals. CMI Control Mode Idle. A control signal sent over the DDS line to indicate that no data activity is being sent.
Glossary Device Test (Devic) A test that uses an internal test pattern generator built into the DSU to verify that the DSU (or DBM) is working properly. The generator sends a test message to the device’s transmitter, where it is looped back to the device’s receiver. The incoming message is then checked for errors, which are reported as Pass if there are no errors, and Fail if an error is found.
COMSPHERE 3550 Series Data Service Units errored second A performance measurement reported during Digital Test or Transmit Test Pattern that is defined as a second in which at least one error has been detected. facility alarm A failure condition reported to the 6700 Series NMS when there is a break in communication with one or more tributary. fallback Retraining of a V.32 DBM at a lower rate or speed. FCC Federal Communications Commission.
Glossary multipoint circuit A data network circuit that uses multipoint transmission and consists of one control with multiple tributaries. Network Management System (NMS) A set of diagnostic and configuration management tools for a data communication network, consisting of software programs and dedicated computer hardware.
COMSPHERE 3550 Series Data Service Units session disruptive Application data may be disrupted when running a test, or running the test may cause the application session to be dropped or terminated. The result depends upon the front-end processor, the time-out parameters, etc. session-nondisruptive diagnostics Diagnostic messages with a duration of .5 seconds or less that are sent over the primary data channel.
Index A B Abort selective, 4-9 subnetwork, 4-9 Abort Call failure message, C-6 AC power, requirements, 1-4 Active message, DBM, C-3 Addr, 4-18 address, assigning, 4-18 addressing, tributary DSU, 2-9, 3-10 Aggreg Exceeded error message, C-11 Alarm, 4-6 All Async>Aggr error message, C-11 Alrm, status indicator, C-2 SDCP, C-2 Ansr, 4-7 Answering DBM message, C-8 AntiStream, 5-17, 5-26 application configuration, selecting, 4-13 DSU, 1-6 TDM, 1-8 V.32 DBM, 1-7 approvals, 1-4 V.
COMSPHERE 3550 Series Data Service Units C cable crossover EIA-232-D, figure, D-8 V.35, figure, D-9 EIA-232, connecting Port 2, 2-11 V.
Index Devic, 4-4, 4-9 message, C-7 device 3600 hubbing, D-2 pin assignments, D-3 CC IN/DC OUT, D-3 health and status, 4-4 messages, C-3 test, 2-12, 3-12, 4-9 Device Fault alarm, C-2 device test DBM test message, C-3 DSU test message, C-4 Device Test Failure, C-7 Diag Type, 5-8, 5-9, 5-10 diagnostic (DBM) configuration options, 5-9 (DSU) configuration options, 5-8 (external DBU) configuration options, 5-10 (general) configuration options, 5-10 control panel, 1-2 interface, 1-6 nondisruptive, 1-1 tributary,
COMSPHERE 3550 Series Data Service Units Dir Empty, DBM error message, C-10 directory dial backup, 4-17 entry, and password characters, 4-18 Disab message, C-7 Disabled DBM message, C-8 Displ, 4-11, 4-19, 4-20 displaying external leads, 4-19 DL, 4-10 DBM test, C-3 DSU test, C-4 port test, C-5 Drop:DTR Disc message, C-6 DSD Speeds diff error message, C-11 Wrong RTS error message, C-11 DSR, status indicator, C-2 DSR FrcOn, 5-18, 5-26 DSR on Tst, 5-18, 5-26 DSU, 1-1 Aggreg Exceeded error message, C-11 compati
Index F I Fac Alarm, C-4 FacAlOnCMI, 5-21 faceplate, Model 3611, 4-3 Facil message, C-7 Facility Alarm, C-2 Fail message, C-6 FCC, 1-4 feature number, F-1 features optional, 1-2 standard, 1-1 FP DBM test, initiator, C-3 DSU test, initiator, C-4 port test, initiator, C-5 frequency, 1-7 front panel DBM test, initiator, C-3 DSU test, initiator, C-4 port test, initiator, C-5 security, 4-21 status indicator, C-2 Full Menu Mode disabled, B-4 enabled, B-2 Full Mode, 4-12 G general configuration options, 5-17 te
COMSPHERE 3550 Series Data Service Units menu selections, backup branch, 4-8 structure, 4-4 tree, A-1 Menu Mode disabled, B-4 enabled, B-2 messages branch, 4-20 control panel, C-1, C-3 device health and status, C-3 error, C-9 TDM/Flex, C-11 expanded health and status, C-6 format, C-3 health and status, C-3 progress, C-8 command, C-8 dial backup, C-8 subnetwork health and status, C-7 mode DBM, C-3 Dial Backup, 4-7 External Backup, 4-7 Idle, 4-7 Menu, 5-5 Standby, 4-7 Model 3550 DDS (LADS) network connection
Index N O NetL, DSU test, C-4 network address, 4-18 addressing, link-level, 3-10 compatibility, DSU, 1-6 connection, 3-8 DDS, 3-9 dial, 3-8 NMS, 3-8 connections, 2-5 DDS (or LADS), 2-7 dial, 2-6 DSU test, initiator, C-4 interface DDS, 1-6 switched, 1-7 loopback, DSU test message, C-4 Next, 5-5 NMS compatibility, 1-5 connection, figure, 2-6 control, 1-1, 1-3 DBM test, initiator, C-3 DSU test, initiator, C-4 network connection, 3-8 port test, initiator, C-5 support, 1-8 No 1.
COMSPHERE 3550 Series Data Service Units port asynchronous rates, TDM, 1-8 capacity, 1-3 DTE interface, TDM, 1-8 rates, 1-5 speed (DBM) configuration options, 5-28 (DSU) configuration options, 5-27 (external DBU) configuration options, 5-29 speeds, 1-3 synchronous rates, TDM, 1-8 test, BERT, C-5 Port Cntrl, 5-23 Port DTR Alarm message, C-5 Port Off Undersp error message, C-12 Position, 5-10 power, terminal, 4-5 power-up routine, 2-5 Prev, 5-5 primary channel, 1-6 progress, messages command, C-8 dial backup
Index shock, 1-4 signal level, 1-7 Single Rate, 5-13 single-port async/sync, 1-1 specifications, technical, 1-3 DSU, 1-6 general, 1-4 TDM/Flex, 1-8 V.
COMSPHERE 3550 Series Data Service Units U W UL, 1-4 Undersp Required error message, C-13 Underspeed, 5-27, 5-28, 5-29 upgrades, 1-3 Wait Callback DBM message, C-8 WaitForAnswr DBM message, C-8 warning, notices, C warranty, 1-8, 1-9 worksheets, configuration, B-1 V V.13 Signl, 5-15 V.32 DBM, 1-2 technical specifications, 1-7 V.35 connector, pin assignments, D-7 crossover cable, figure, D-9 interconnect cable, 3-7 figure, D-6 V.
