MEGAPLEX-2100 I/O Modules Multi-Channel Low-Speed Data Modules LS-2 LS-2A LS-2A/2TS MTLS-2 MTLS-2/2TS LS-2/M Installation and Operation Manual Notice This manual contains information that is proprietary to RAD Data Communications. No part of this publication may be reproduced in any form whatsoever without prior written approval by RAD Data Communications.
Table of Contents Chapter 1. Introduction 1.1 Functional Description ..............................................................................................................................1-1 General....................................................................................................................................................1-1 LS-2 Module Versions ............................................................................................................................
Modules LS-2, LS-2A, LS-2A/2TS, MTLS-2.........................................................................................2-9 Module MTLS-2/2TS .............................................................................................................................2-9 Module LS-2/M ......................................................................................................................................2-9 2.6 Configuration Instructions ...................................................
List of Figures Figure 1-1. Typical Application for MTLS-2/X.50 Modules ...................................................... 1-3 Figure 1-2. Typical Application for MTLS-2/X.58 Modules ...................................................... 1-4 Figure 1-3. Typical Application for MTLS-2/SDM Modules...................................................... 1-4 Figure 1-4. Typical Application for MTLS-2/2TS and LS-2A/2TS Modules ............................. 1-5 Figure 1-5.
List of Tables Table 1-1. Main Characteristics of LS-2 Module Versions ......................................................... 1-2 Table 1-2. ITU-T Rec. X.50 Equivalent Channels..................................................................... 1-12 Table 1-3. Frame Synchronization Sequence Length ................................................................ 1-15 Table 1-4. /SDM Version, Channel Availability for Highest User Rate of 19.2 kbps............... 1-15 Table 1-5.
Chapter 1. Introduction 1.1 Functional Description General This manual describes the technical characteristics, applications, installation, and operation of the LS-2 family of low-speed data sub-multiplexer modules for the MEGAPLEX-2100 Modular T1/E1 Multiplexer Systems. The LS-2 modules use byte-interleaved time division multiplexing to allow the transmission of large numbers of low-speed synchronous and asynchronous channels, at rates of 2.4, 4.8, 9.6, and 19.
Introduction LS-2 Module Versions Table 1-1 lists the main characteristics of the various LS-2 module versions. Table 1-1. Main Characteristics of LS-2 Module Versions Version Number of Transmission Channels Mode Multiplexing Standard Main Link Time Slots Chassis Model, Module Size, and Connectors LS-2/X.50 10 Synchronous only ITU-T Rec. X.50 1 4U module for use in MEGAPLEX-2100, and LS-2.X.58 6 Synchronous only ITU-T X.58 1 MEGAPLEX-2104. LS-2/SDM 10 Synchronous only AT&T Pub.
Introduction Main Features This section describes the main features of the modules offered in the LS-2 series. MTLS-2 and LS-2A Modules The MTLS-2 and LS-2A modules include three versions of modules, identified by /X.50, /X.58, and /SDM. The MTLS-2 and LS-2A modules support both synchronous and asynchronous operation. MTLS-2/X.50, LS-2A/X.50 These modules use a sub-multiplexing technique compatible with ITU-T Rec. X.50, Division 3, and ITU-T Rec. X.54. An MTLS-2/X.50 and LS-2A/X.
Introduction channels, a group of two /X.58 modules can provide up to twelve 4.8 kbps channels, and a group of four /X.58 modules can provide up to twenty-four 2.4 kbps channels. The allowable combinations of channel numbers and data rates are explained in Section 1.2. Figure 1-2 shows a typical application for MTLS-2/X.58 modules. MEGAPLEX System MEGAPLEX System 1 12 x 4.8 kbps (1 Time Slot) 6 x 9.6 kbps (1 Time Slot) . . . . . 12 . 1 .. . 6 1 MTLS-2 MTLS-2 MTLS-2 MTLS-2 X.
Introduction /SDM modules can provide up to twenty 2.4 kbps channels. Other combinations of channel numbers and data rates are allowable (see Section 1.2). LS-2 Modules The LS-2 modules include three versions of modules, identified by /X.50, /X.58, and /SDM. The LS-2 modules are similar in characteristics to the MTLS-2 and LS-2A modules described above, except that they support only synchronous operation.
Introduction • Transmission of five synchronous or asynchronous 9.6 kbps channels, in one main link time slot. LS-2/M Module Figure 1-5 shows a typical application for the LS-2/M module. MEGAPLEX System 1 12 x 2.4 kbps (1 Time Slot) 6 x 4.8 kbps (1 Time Slot) .. .. .. 12 1 .. . 6 LS-2 LS-2 LS-2 X.50 Cross-Connect Switch 1 LS-2/M LS-2/M 12 1 LS-2/M 6 SRM-8 Modems .. . . .. . .. .. . SRM-8 Modems MEGAPLEX System Figure 1-5.
Introduction Channel Characteristics Channel Data Rates The channels of all the LS-2 module versions, except the /2TS versions, support user-selectable data rates of 2.4, 4.8, 9.6 and 19.2 kbps; the /2TS versions support only 9.6 kbps. Digital Channel Transmission Modes For all the module versions, the channels can operate in the synchronous mode. For the LS-2A, LS-2A/2TS, MTLS-2 and MTLS-2/2TS versions, channels can also operate in the asynchronous mode.
Introduction • For DTE interfaces, the lines are used as follows: The RTS line is an output, and the CTS line is an input (this input is ignored, i.e., assumed to be asserted at all times). The DSR and DCD lines are inputs. The DTR line is an output, and is continuously ON. Digital Channel Connectors With respect to connectors, the digital channels are divided into two groups of equal size.
Introduction Because of the use of synchronous-to-asynchronous conversion, when configuring the individual channels, it is necessary to select the DCE timing mode for asynchronous channels. In the asynchronous mode, the user can select the word length (8 through 11 bits) using an internal DIP switch. The required word length is obtained the adding the number of start bits, data bits, parity bits, and stop bits generated by the user's asynchronous equipment. The bits are transparently transferred, e.g.
Introduction Management and Diagnostics Channel data rates, as well as all the operating parameters are controlled by the system management. Self-diagnostics upon power-up, as well as powerful testing capabilities controlled by the system management, reduce downtime to a minimum. The diagnostics functions available on the LS-2 modules are as follows: • Activation of a local or remote test loopback on the desired module channel.
Introduction 1.2 System Planning Considerations This section explains the multiplexing formats used by the different LS-2 models, and provides information regarding the number of channels versus channel data, and information on LS-2 time slot routing. Byte Interleaved Multiplexing Formats The LS-2 modules perform byte-interleaved time division multiplexing (TDM). In byte-interleaved TDM, the information received from each module is inserted in an eight-bit envelope.
Introduction Envelope 1 2 3 4 5 6 6 User Data Bits F Bit (Framing and Housekeeping) 7 8 S Bit (Status Bit) Figure 1-7. ITU-T Rec. X.50 Envelope Structure The resulting equivalent channels are listed in Table 1-2. Note that the user's payload is 6/8th of the equivalent channel rate. Table 1-2. ITU-T Rec. X.50 Equivalent Channels Channel Rate Number of Channels in 64 kbps User's Payload 12.8 kbps 5 9.6 kbps 6.4 kbps 10 4.8 kbps 3.2 kbps 20 2.
Introduction Envelope No. 1 7 2 8 3 9 4105116127138149151016111712181319142015 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 ... 2.4 kbps Channel (1 Envelope Out of 20) 1 7 2 8 3 9 4105116127138149151016111712181319142015 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 ... 4.8 kbps Channel (2 Envelopes Out of 20) 1 7 2 8 3 9 4105116127138149151016111712181319142015 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 .
Introduction Substructure No.1 S1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 A1 B1 C1 D1 E1 F1 B2 A2 D2 C2 F2 E2 A3 B3 C3 D3 E3 F3 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 B4 A4 D4 C4 F4 E4 A1 B1 C1 D1 E1 F1 B2 A2 D2 C2 F2 E2 18 Substructure No.2 S2 19 Substructure No.
Introduction control bit, which indicates the information carried by each byte: 0 1 • Control data User data The first bit is used exclusively as a framing bit. The length of the frame synchronization sequence depends on the highest required channel data rate as shown in Table 1-3. Table 1-3. Frame Synchronization Sequence Length Highest Channel Data Rate Frame Synchronization Sequence Length 2.4 kbps 20 bits 4.8 kbps 10 bits 9.6 kbps 5 bits 19.
Introduction Table 1-5. /SDM Version, Channel Availability for Highest User Rate of 9.6 kbps Number of Envelopes Number of User Channels vs. Data Rate in Structure 9.6 kbps 4.8 kbps 2.4 kbps 5 5 4 4 3 3 3 2 2 2 2 1 1 1 1 1 – 1 – 2 1 – 3 2 1 – 4 3 2 1 – – – 1 – 1 2 – 1 2 3 – 1 2 3 4 Table 1-6. LS-2/SDM Channel Availability for Highest User Rate of 4.8 and 2.4 kbps Number of User Channels vs. Data Rate Highest User Number of Envelopes Rate in Structure 4.8 kbps 2.4 kbps 4.
Introduction Module Groups To allow the utilization of the maximal number of channels that can be carried in one time slot, the LS-2 modules can be operated in groups. A group is formed by assigning the desired group ID number to all the LS-2 modules that will be part of the group (the assignment is performed by means of the system management). The available range of group numbers is 1 through 12. A group can consist of: • One or two /X.50 modules. • One or two /SDM modules.
Introduction 1.3 Technical Specifications Module Characteristics See Table 1-1 Time Slots Used One time slot per group (64 kbps main link bandwidth). Results in the following number of channels: Data Rate /X.50, /SDM Versions /2TS Versions /X.58 Version 2.4 kbps 20 10 24 4.8 kbps 10 10 12 9.6 kbps 5 10 6 19.2 kbps 2 (plus one 9.6 kbps) 4 (plus two 9.6 kbps) 3 Digital Channel Interface Type V.24/RS-232, DTE or DCE (user-selectable) Bit rates 2.4, 4.8, 9.6 or 19.
Introduction Modem bit rates 2.4, 4.8, 9.6 or 19.
Introduction 1-20 MP2100M-LS-2 Modules - Installation and Operation Manual
Chapter 2. Module Installation and Operation 2.1 General This chapter provides installation, configuration and operation instructions for the various versions of LS-2 modules. The information presented in this chapter supplements the general MEGAPLEX-2100 installation, configuration and operation instructions contained in Part I of the Installation and Operation Manual.
Module Installation and Operation 2.2 Preparation for Installation The operating mode of the LS-2 and LS-2/M module versions is controlled only by software, and therefore no jumpers or switches have to be set by the user. Therefore, for these modules you may skip this section and proceed with the installation of the module in the equipment enclosure, as explained in Section 2.3. For the other module versions, there are hardware settings that control parameters which are not configurable by software.
Module Installation and Operation DCE DTE DCE CH6-10 CH1-5 DCE LENGTH 8BI T 9BI T 10BI CH1 CH2-5 CH6-10 LEN0 LEN1 LEN0 LEN1 OFFASYNC ON-SYNC DTE S1 1 2 3 4 5 6 7 8 T 11BI T LEN1 OF F OF F O N O N DTE LEN0 OF F O N OF F O N DCE DTE DCE-DTE SELECTORS DCE DTE DCE DC E MOD E DT E MOD E DTE DCE DTE DCE DTE DCE DTE DCE DTE DCE DTE CH6 CH7 CH8 CH9 CH10 CH1 CH2 CH3 CH4 CH5 Figure 2-1.
Module Installation and Operation Sections 1, 2, 3 These sections select the channel transmission mode (synchronous or asynchronous). With respect to the transmission mode (synchronous or asynchronous), the channels are divided into three groups. • Section 1: controls channel 1. • Section 2: for /X.50 and /SDM versions, controls channels 2 through 5, and for /X.58 versions controls channels 2 and 3. • Section 3: for /X.50 and /SDM versions, controls channels 6 through 10, and for /X.
Module Installation and Operation OFF ON OFF ON OFF OFF ON ON LEN1 LEN0 LENGTH 8BIT 9BIT 10BIT 11BIT OFF-ASYNC CH1 ON-SYNC CH2-5 CH6-10 LEN0 CH1-5 LEN1 LEN0 CH6-10 LEN1 S1 ON 1 2 3 4 5 6 7 8 ON S1 2 3 4 5 6 7 OFF-ASYNC CH1 ON-SYNC CH2-5 CH6-10 LEN0 CH1-5 LEN1 LEN0 CH6-10 LEN1 1 8 LENGTH 8BIT 9BIT 10BIT 11BIT LEN1 LEN0 OFF OFF ON ON OFF ON OFF ON Figure 2-3.
Module Installation and Operation 2.3 Module Installation For your safety, do not connect cables to the module before the module is installed in a properly installed and grounded MEGAPLEX enclosure. Installation in Enclosure Refer to the system installation plan and insert the module in the assigned I/O slot of the MEGAPLEX enclosure. For MTLS-2 and MTLS-2/2TS modules, install the required interface module in the corresponding slot: Cable Connections • IM-S68/2 interface module for the MEGAPLEX-2100F.
Module Installation and Operation 2.4 Module Panels The panels of the LS-2 modules are shown in figure 2-4. MTLS-2 TS-A TS-B SYNC LOSS LS-2/M LS-2/A SYNC LOSS SYNC-LOSS TST CH 1-5 CD CH-1 TST CD CH-2 TST CD CH-3 TST CH 6-10 CD CH-4 TST CD CH-5 TST CD CH-6 Figure 2-4. Typical Module Panels Modules MTLS-2, MTLS-2/2TS The MTLS-2 and MTLS-2/2TS panels include two SYNC LOSS indicators.
Module Installation and Operation the first group of channels (1 through 5) of the local module, which uses one time slot, loses synchronization to the corresponding group of the remote module. The indicator designated SYNC LOSS TS-B has the same function with respect to the second group of channels (6 through 10), which uses the other time slot; the indicator is off when only the first group of channels is in use.
Module Installation and Operation 2.5 Normal Indications The module starts operating as soon as it is plugged into an operating MEGAPLEX enclosure. The normal indications for each module type are listed below. Modules LS-2, LS-2A, LS-2A/2TS, MTLS-2 If the link to the remote MEGAPLEX unit is operating, and the data base contains all the configuration parameters necessary for the module, the SYNC LOSS indicator of the module will turn off after a few seconds, and the module will start normal operation.
Module Installation and Operation 2.6 Configuration Instructions General This section provides information on the configuration parameters of the LS-2 modules. The configuration activities required to select the desired values of these parameters are performed by means of the management system used to control the MEGAPLEX unit.
Module Installation and Operation Table 2-4. External Port Parameters Parameter Description Connect Determines whether the port will be connected to the main link YES Port is connected. This selection is effective only when the module itself is connected to the main link NO Port is disconnected. You can still program the desired parameters, so the channel will be ready to operate when needed Rate (kbps) Specifies the port user's data rate, 2.4, 4.8, 9.6 and 19.2 kbps.
Module Installation and Operation 2-12 MP2100M-LS-2 Modules - Installation and Operation Manual
Chapter 3. Alarms & Diagnostics 3.1 General This chapter provides information on the alarms generated by the LS-2 modules, and instructions for using the module-specific diagnostic functions. The diagnostic information presented in this chapter supplements the general MEGAPLEX-2100 diagnostics operation instructions contained in Part I of the manual. 3.2 Alarm Messages Table 3-1 lists the specific alarm messages generated by the LS-2 module, specifies their type, and explains their interpretation.
Alarms & Diagnostics Table 3-1. LS-2 Alarm Messages (Cont’d) Code Message Type Interpretation 029 NOT SUPPORTED SOFTWARE VER State The software version of the LS-2 module does not match the version expected by the software version of the CL module 180 SUB RATE MUX LOCAL SYNC LOSS State The local LS-2 module is not synchronized.
Alarms & Diagnostics 3.3 Diagnostics Loopback Types The LS-2 modules have an extensive set of test loopbacks that includes local and remote loopbacks on each channel. When a test or loopback is activated, the user can also specify the time it remains active: the range is 1 through 30 minutes, in 1-minute steps. After the specified time, the test or loopback is automatically deactivated, thereby reducing the management workload during system troubleshooting.
Alarms & Diagnostics Local Channel Loopback The local channel loopback is performed within the channel user interface, by returning the transmit signal arriving from the user on the receive path. At the same time, the transmit channel signal is connected to the input of the transmit path and is sent to the remote user. When everything works O.K., the local user should receive its own transmission. The loopback signal path is shown in figure 3-2. Channel 1 User or Test Equipment . . . .. . Channel 2 .
Alarms & Diagnostics Channel 1 User or Test Equipment .. . Channel 2 . . . . . . .. . MEGAPLEX System MTLS-2 MEGAPLEX System User or Test Equipment Local Unit Remote Unit I/O MODULES I/O MODULES MTLS-2 System Management Figure 3-3. Remote Channel Loop External Modem Loopback (External Modem Remote Loop) LS-2/M Only User or Test Equipment The remote modem loopback is an ITU-T Rec. V.
Alarms & Diagnostics Externally Initiated Local Modem Loopback - LS-2/M Only The external initiated local modem loopback is an ITU-T Rec. V.54 loop 2 performed by the internal channel, in response to the command sent by the external modem connected to the LS-2/M channel. This loop cannot be connected by a System Manager command, but its activation is indicated by an alarm message (EXT INITIATED TEST IN CHn, where n is the channel number).
Alarms & Diagnostics If the local subscriber receives its own signal when the local loopback is connected, the problem is at the remote end. To check, repeat the procedure on the remote MEGAPLEX. For modules having built-in modems (e.g. LS-2/M), use the following procedure: • Request the user to perform a local loopback test on the external modem connected to its equipment.
Alarms & Diagnostics 3-8 MP2100M-LS-2 Modules - Installation and Operation Manual
Appendix A. Connection Data A.1 Interface Modules for MTLS-2/MTLS-2/2TS The MTLS-2 and MTLS-2/2TS modules require the IM-S68/2 interface module when installed in the MEGAPLEX-2100F, and the IMB-S68/2 interface module when installed in the MEGAPLEX-2100B. Figure A-1 shows the panels of the IM-S68/2 and IMB-S68/2 modules. IM-S68/2 CH. 1-5 CH. 6-10 IMB-S68/2 CH. 6-10 CH. 1-5 Figure A-1.
Connection Data The interface modules have two 68-pin connectors, one for channels 1 through 5, the other for channels 6 through 10. Table A-1 lists the wiring of both connectors. The CBL-LS202 column also lists the pin assignment of the 25-pin connector of the adapter cable serving the corresponding channel. Table A-1.
Connection Data Table A-1. IM-S68/2 and IMB-S68/2 Modules, 68-Pin Connector Pin Assignment (Cont’d) Connector Pin Direction CH1–5 CH6–10 Connector Connector 68-Pin (Module Side) CBL-LS202 Cable (25-Pin Side) Channel 5 (Note 2) Channel 10 (Note 2) 29 66 30 65 34 33 32 67 31 64 68 63 1 3 2 4 5 6 8 15 24 17 20 7 Function Frame GND RD TD RTS CTS DSR DCD TCLK EXTCK RCLK DTR Signal GND DCE DTE OUT IN IN OUT OUT OUT OUT IN OUT IN - IN OUT OUT IN IN IN IN OUT IN OUT - Notes 1.
Connection Data A.2 LS-2/M Module Connectors Each channel of the LS-2/M module has an RJ-11 connector wired as shown in Table A-2. Table A-2.
Connection Data A.3 LS-2, LS-2A, and LS-2A/TS Modules Connectors The LS-2, LS-2A and LS-2A/TS modules have two 44-pin connectors, one for channels 1 through 5, the other for channels 6 through 10. Table A-3 lists the wiring of both connectors. The CBL-LS201 column also lists the pin assignment of the 25-pin connector of the adapter cable serving the corresponding channel. Table A-3.
Connection Data Table A-3. LS-2, LS-2A and LS-2A/TS Modules, 44-Pin Connector Pin Assignment (Cont’d) Connector Pin CH1–5 CH6–10 Connector Connector 44-Pin (Module Side) CBL-LS201 Cable (25-Pin Side) Channel 5 (Note 2) Channel 10 (Note 2) 44 43 28 29 15 30 13 14 9 2 3 2 4 5 6 8 15, 17 7 1 24 Function RD TD RTS CTS DSR DCD INTCK Signal GND Frame GND EXTCK Direction OUT IN IN OUT OUT OUT OUT IN N/A IN Notes 1. Direction: IN Input to channel OUT Output from channel 2. For LS-2/X.
