COMSPHERE 3800 SERIES MODEMS MODEL 3830 USER’S GUIDE Document No.
COMSPHERE 3800 Series Modems – Model 3830 COMSPHERE 3800 Series Modems Model 3830 User’s Guide 3830-A2-GB91-30 4th Edition (August 1998) Changes and enhancements to the product and to the information herein will be documented and issued as a new release or a limited revision of this manual. For the Model 3830 standalone modem, the Universal Service Order Code (USOC) for Permissive mode is RJ11C. The Canadian equivalent to the USOC is CA11.
Trademarks Warranty, Sales, and Service Information Contact your sales or service representative directly for any help needed. For additional information concerning warranty, sales, service, repair, installation, documentation or training, use one of the following methods: • Via the Internet: Visit the Paradyne World Wide Web site at http://www.paradyne.com • Via Telephone: Call our automated call system to receive current information via fax or to speak with a company representative. – Within the U.S.
COMSPHERE 3800 Series Modems – Model 3830 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.
Safety Instructions 8. A rare phenomenon can create a voltage potential between the earth grounds of two or more buildings. If products installed in separate buildings are interconnected, the voltage potential may cause a hazardous condition. Consult a qualified electrical consultant to determine whether or not this phenomenon exists and, if necessary, implement corrective action prior to interconnecting the products. 9.
COMSPHERE 3800 Series Modems – Model 3830 Notices
Safety Instructions Government Requirements and Equipment Return Certain governments require that instructions pertaining to modem connection to the public switched telephone network be included in the installation and operation manual. Specific instructions are listed in the following sections. United States Notice To Users Of The Public Switched Telephone Network 1. This equipment complies with Part 68 of the FCC rules.
COMSPHERE 3800 Series Modems – Model 3830 6. If you experience trouble with this equipment, please contact your sales or service representative (as appropriate) for repair or warranty information. If the product needs to be returned to the company service center for repair, contact them directly for return instructions using one of the following methods: • Via the Internet: Visit the Paradyne World Wide Web site at http://www.paradyne.
Safety Instructions Canada Notice To The Users Of The Canadian Public Switched Telephone Network The Canadian Department of Communications label identifies certified equipment. This certification means that the equipment meets certain telecommunications network protective, operational and safety requirements. The Department does not guarantee the equipment will operate to the user’s satisfaction.
COMSPHERE 3800 Series Modems – Model 3830 termination on a loop may consist of any combination of devices subject only to the requirement that the total of the Load Numbers of all devices does not exceed 100. If your equipment is in need of repair, refer to the procedure in the Government Requirements and Equipment Return section.
Table of Contents Preface Objectives and Reader Assumptions . . . . . . . . . . . . . . . . . . v How to Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . v Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi 1.
COMSPHERE 3800 Series Modems – Model 3830 4. AT Command Set and S-Registers Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Command Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AT Command List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-Register List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents List of Figures Figures 1-1 2-1 C-1 Page Model 3830 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Model 3830 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Wiring Diagram – 8-Position to 6-Position Conversion Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3800 Series Modems – Model 3830 List of Tables Tables Page 1-1 4-1 4-2 4-3 A-1 A-2 A-3 A-4 A-5 B-1 C-1 C-2 D-1 D-2 1-4 4-4 4-7 4-30 A-2 A-3 A-4 A-7 A-8 B-1 C-1 C-5 D-8 D-9 iv Model 3830 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Result Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model 3830 AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model 3830 S-Registers . . . . . . . . . . . . . . . . . . . .
Preface Objectives and Reader Assumptions This manual describes how to install and operate the Model 3830 standalone modem. This manual assumes that you have a basic understanding of dial modems and their operation. How to Use this Manual Chapter 1 provides information about the 3830 modem’s hardware and software features, including the front panel and status indicators.
COMSPHERE 3800 Series Modems – Model 3830 Related Documents 3810-A2-GB30 COMSPHERE 3800 Series Modems, Models 3810, 3811, and 3820, User’s Guide 6700-A2-GY31 COMSPHERE 6700 Series Network Management System User’s Guide Contact your local sales representative, service representative, or distributor directly for any help needed.
Introduction 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . COMSPHERE Model 3830 Modem Front Panel and Status Indicators . . . . . Status Indicators (LEDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3800 Series Modems – Model 3830 Features The 3830 modem has a wide variety of features, including: 1-2 • Dial-Line Modulations: V.32terbo (19,200 and 16,800 bps), ITU-T V.32bis (14,400, 12,000, 9600, 7200, and 4800 bps), V.32 (9600 and 4800 bps), V.22bis (2400 bps), V.22 (1200 bps), V.21 (300 bps), Bell 212A (1200 bps), and Bell 103J (300 bps). • Two-wire Leased-Line Modulations: V.32terbo (19,200 and 16,800 bps), V.32bis (14,400, 12,000, 9600, 7200, and 4800 bps), and V.
1. Introduction • Compatibility with COMSPHERE 3800 Series modems’ Remote Access Mode, which allows users of 3810, 3811, and 3820 modems to view the configuration options of a 3830 modem from their front panel LCD displays. • Storage of up to 10 telephone numbers to directory locations. • Two factory-defined configurations and two user-defined configuration areas.
COMSPHERE 3800 Series Modems – Model 3830 Table 1-1 (1 of 2) Model 3830 LEDs Label Color Indicates PWR green Power ON. Power is on and the modem is capable of operating. ALRM red OH green Alarm Flashing The modem has detected an internal malfunction. Off-Hook ON. The modem is off-hook. OFF. The modem is on-hook. DTR/108 green Data Terminal Ready The DTE has turned ON DTR or the modem has forced DTR ON. RTS/105 green Request-to-Send The DTE has data to send to the modem.
1. Introduction Table 1-1 (2 of 2) Model 3830 LEDs Label RATE Color yellow Indicates Rate ON. The modem is connected at a data rate lower than the data rate it is configured for. OFF. The modem is connected at its configured data rate. AT yellow AT Command Set ON. The AT command set is disabled. OFF. The AT command set is enabled. Slow Flash. The modem will not respond to all AT commands due to the setting of the AT Command Mode configuration option (see S84 in Chapter 4).
COMSPHERE 3800 Series Modems – Model 3830 1-6 August 1998 3830-A2-GB91-30
Model 3830 Modem Installation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model 3830 Modem Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Customer-Supplied Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model 3830 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DTE Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3800 Series Modems – Model 3830 • Two ferrite chokes and cable ties • Fax software and documentation (if fax option installed) If any hardware components are damaged, notify your service representative. Return equipment using the procedures described in the Government Requirements and Equipment Return section in the front of this book.
2. Model 3830 Modem Installation • An 8-pin modular keyed jack for external telephone set use only. • An 8-pin modular keyed jack for dial (PSTN) lines or 2-wire leased lines. • A 25-pin DB-25-S receptacle for DTE interface. Figure 2-1.
COMSPHERE 3800 Series Modems – Model 3830 DTE Connection Use the following procedures to connect the EIA-232-D cable and ferrite choke from the modem to the DTE: 1. Make sure the modem’s rear panel power switch is Off. 2. Connect the DB-25-P (male) connector on the cable to the DB-25-S (female) connector labeled DTE (Figure 2-1) on the modem’s rear panel. Use a small screwdriver to tighten the cable to the modem. 3. Connect the DB-25-P connector on the cable to the DB-25-S connector on the DTE.
2. Model 3830 Modem Installation 2-Wire Leased-Line Connection Use the following procedures to connect a Model 3830 modem to the 6-pin, center pair, leased-line network interface. (For 2-wire leased line connection to a JM8 network interface, refer to Appendix C, Pin Assignments.) 1. Insert the 6-position, 4-conductor modular plug into the jack labeled LINE, Figure 2-1. 2. Insert the other end of the modular cord into the leased-line network interface.
COMSPHERE 3800 Series Modems – Model 3830 To ensure compliance with FCC Part 15 Regulations, a ferrite choke must be installed on the power transformer cable. 1. Open the ferrite choke, place it around the power transformer cable as close as possible to the connector attached to the modem, and snap the ferrite choke shut. 2. Install a cable tie behind the ferrite choke to prevent it from sliding along the cable.
2. Model 3830 Modem Installation Selecting Factory Configuration Options After the modem passes the power-up self-test, it can be configured for operation using one of two factory preset configurations. These factory preset templates contain the most commonly used configuration options (straps) for Asynchronous Dial and UNIX hardware network configurations. Your modem is shipped from the factory with the Async Dial default configuration options stored in memory.
COMSPHERE 3800 Series Modems – Model 3830 1. Use the AT&F&W command to load the appropriate factory configuration to the appropriate storage area. Enter the following: TYPE: AT&Fy&Wn Where: y is one of the following Factory configurations: 0 for Async Dial 3 for UNIX Dial 5 for Cellular (Mobile) 6 for Cellular (PSTN) and Where: n is one of the following storage areas: 0 for Active (Saved) 1 for Customer 1 2 for Customer 2 &F5 and &F6 are available only if Enhanced Throughput Cellular (ETC) is installed.
2. Model 3830 Modem Installation To establish a connection with a remote modem, use the D (Dial) command. Refer to Chapter 4, AT Commands and S-Registers, for more information. Recovering AT Commands AT commands are issued from asynchronous terminals and personal computers. Certain dialing methods, such as V.25bis and synchronous operation, disable the use of AT commands and place the modem into a state known as Dumb mode. The Model 3830 is capable of normal operation when in Dumb mode.
COMSPHERE 3800 Series Modems – Model 3830 If these characters are not echoed back to the DTE screen after the power-up self-test is complete, then the modem is still in Dumb mode and maintains its current configuration. Turn the modem Off and then ON again, and repeat Step 1. 2. Once the characters are echoed back to the DTE, TYPE: T*** (The case of this character must be consistent with the case used in Step 1. Mixed case prefixes such as aT or At are not recognized.
2. Model 3830 Modem Installation Initialization Strings An initialization string contains several AT commands that are entered at once to program the modem for a specific application. The following initialization strings identify essential AT commands that directly impact modem operation for a particular application. If you need to modify these strings for your application, make sure additional commands are inserted somewhere in the middle of the initialization string.
COMSPHERE 3800 Series Modems – Model 3830 Synchronous Leased-Line Applications For synchronous leased-line operation, create the following initialization string with the following commands: TYPE: AT&F &D1 &S1 S44=n S45=n S82=n &M1 &Ln &W Where: n is the value for the AT command. Refer to either Table 4-2 or Table 4-3 in Chapter 4 to determine the best possible values for these commands.
Fax Operation 3 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Fax Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Overview The procedures for sending and receiving facsimile documents with your modem depend on the fax software you use.
COMSPHERE 3800 Series Modems – Model 3830 • You must have configured your modem according to the specifications of your fax software manual. For example: – Some fax software requires that the modem have Auto-Answer disabled. You can set this with the ATS0=0 command. – Some fax software requires that the modem use software flow control. You can set this with the AT\Q1 command. – DTR Action should be set for standard EIA-232-D operation. Use the AT&D2 command.
AT Command Set and S-Registers 4 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Switching Between Data Mode and Online Command Mode . . . . . . . . . Escape Sequence and Escape Guard Time . . . . . . . . . . . . . . . . . . . . . . Command Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3800 Series Modems – Model 3830 Switching Between Data Mode and Online Command Mode Sometimes it is necessary to change operating parameters while the modems are online. The Escape Sequence allows you to toggle the modem between Data mode and online Command mode while maintaining a connection with the remote modem. This is accomplished using the escape sequence (+ + +) to exit Data mode and the O command to return to Data mode.
4. AT Command Set and S-Registers Command Guidelines Review the following guidelines before using any AT Commands. • The escape sequence (+ + +) is used to enter online Command mode from Data mode. • The asynchronous character format for the AT command set must be one of the following: – 8 data bits + no parity + 1 stop bit. – 7 data bits + no parity + 2 stop bits. – 7 data bits + parity + 1 stop bit (parity can be odd, even, mark, or space).
COMSPHERE 3800 Series Modems – Model 3830 Result Codes Table 4-1 lists all valid result codes for the Model 3830 modem. Refer to the Vn and Xn commands for more on result codes.
4.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-1 (3 of 3) Result Codes Numbers (1) Numbers (2) Word 30 30 CONNECT 57600** Connection at 57,600 bps 32 32 CONNECT 76800** Connection at 76,800 bps 34 34 CONNECT 115200** Connection at 115,200 bps Description ** Appears when the Extended Result Codes configuration option is set for Use DTE Rate. This displays the DTE data rate instead of the line rate.
4. AT Command Set and S-Registers Table 4-2 (1 of 23) Model 3830 AT Commands *** AT Command Recovery Mode Allows the modem to remain in Asynchronous data mode so that AT commands can be used to change the modem’s current configuration. Use this command when AT commands are disabled or the modem is operating in Synchronous data mode. This command can only be executed after the completion of a power-up self-test.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (2 of 23) Model 3830 AT Commands Dn Dial Begins the dialing sequence. The dial string n (modifiers and telephone number) is entered after the D command. Any digit 0–9, * , # , A, B, C, D, may be dialed as a DTMF tone. Only the digits 0–9 can be dialed in Pulse Dial mode. The following example shows how to dial through a PBX.
4. AT Command Set and S-Registers Table 4-2 (3 of 23) Model 3830 AT Commands Dn, continued R – Reverse Dial mode. Causes the originating modem to send out an answertone once it no longer detects ringback. (Ringback is the ring you hear at the originating site when making a call.) The R parameter must be the last character in the dial string. For correct operation, at least one ringback must be detected; therefore, the remote modem should be configured to answer on the second ring or subsequent rings.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (4 of 23) Model 3830 AT Commands In Identification Provides useful information when upgrading or servicing the product. I0 I1 I2 I3 I4 I5 I6 I9 Displays product code (default is 144). Displays 3-digit firmware revision number. Performs an EPROM check. Displays serial number. Displays model number. Displays hardware part number. Displays software part number. Displays 3-digit firmware revision number (same as I1).
4. AT Command Set and S-Registers Table 4-2 (5 of 23) Model 3830 AT Commands Qn Result Codes Result codes are informational messages (such as Connect and Ring) sent from the modem and displayed on the asynchronous DTE terminal. Refer to Table 4-1 for a list of result codes. Q0 Enables modem to send result codes to the DTE. Q1 Disables modem from sending result codes to the DTE. Q2 Enables in Originate mode only for modem to send result codes to the DTE. Required for most UNIX applications.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (6 of 23) Model 3830 AT Commands Xn Extended Result Code, Dial Tone Detect, and Busy Tone Detect The Xn command sets three configuration options simultaneously: X0 X1 X2 X3 X4 X5 X6 X7 Ext Result Code Dial Tone Detect Disable Enable Enable Enable Enable Add/EC Add/V42,MNP Use DTE Rate Disable Disable Enable Disable Enable Enable Enable Enable Busy Tone Detect Disable Disable Disable Enable Enable Enable Enable Enable EXTENDED RESULT CODE Informa
4. AT Command Set and S-Registers Table 4-2 (7 of 23) Model 3830 AT Commands Xn, continued BUSY TONE DETECT Sets the modem to monitor for Busy Tone (Enable) or ignore Busy Tone (Disable). Disable. Modem ignores busy tone. Enable. Modem monitors for busy tone. Yn Long Space Disconnect Determines the modem’s response to a continuous spacing condition sent from the remote modem when it goes on-hook. Issuing a long space is one method of disconnecting a call. Y0 Disable. Ignores long space. Y1 Enable.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (8 of 23) Model 3830 AT Commands &Cn LSD Control Line Signal Detect (LSD) is a signal indicating that the carrier signal is being received from the remote modem. It is normally turned Off to the DTE when the power level of the received carrier signal drops below the carrier detect threshold. &C0 Forced On. LSD ON at all times. &C1 Standard EIA-232. LSD is ON when the remote modem’s carrier signal is detected.
4. AT Command Set and S-Registers Table 4-2 (9 of 23) Model 3830 AT Commands &Dn DTR Action Data Terminal Ready (DTR) is a signal from the DTE to the modem indicating that the DTE is connected and ready for operation. &D0 Ignore. Modem ignores the true status of DTR and treats it as always ON. &D1 Off=Command Mode. Modem enters online Command Mode if connected when DTR switches off. &D2 Standard EIA-232. DTR Signal is controlled by the DTE. &D3 Off=Reload Strap.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (10 of 23) Model 3830 AT Commands &Fn Select Factory Default Configuration Options (cont’d) If ETC is installed and your modem is attached to a cellular telephone, use the &F5 command to configure the modem for cellular communications. &F5 sets the following configuration options: AT Command Option Value Maximum Frame Size \A4 Error Control Mode \N4 Auto-Answer Rings S0=3 No Answer Timeout S7=120 No Carrier Disconnect S10=100 V.32bis Train S43=1 V.
4. AT Command Set and S-Registers Table 4-2 (11 of 23) Model 3830 AT Commands &In Dial Transmit Level for Cellular Auto When Dial Transmit Level Type is set to Permissive, &In sets Dial Transmit Level to a value between –10 and –32 dBm. If Enhanced Throughput Cellular (ETC) is installed, &I99 and &I100 causes the level to be varied automatically according to conditions for ETC operation. &J0 overrides this command. &I10 –10 dBm &I11 –11 dBm D D D D &I32 –32 dBm &I99 Valid only if ETC is installed.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (12 of 23) Model 3830 AT Commands &Mn or &Qn Async/Sync Mode and DTE Dialer Type Sets the modem for either asynchronous or synchronous operation and selects the type of dialing method the modem uses. &M0, &Q0 Modem operates in Asynchronous data mode and uses AT Command protocol. &M1, &M3, &Q1, &Q3 Modem operates in Synchronous data mode and uses AT Command protocol.
4. AT Command Set and S-Registers Table 4-2 (13 of 23) Model 3830 AT Commands &Rn RTS Action Request-to-Send (RTS) is a signal from the DTE to the modem indicating the DTE has data to send to the modem. &R0 Standard EIA-232. DTE controls RTS to the modem in normal EIA-232-D operation. RTS must be ON for the DTE to transmit to the modem. &R1 Ignores RTS. Modem assumes RTS is always ON. Use this selection when the DTE does not provide RTS to the modem. &R2 Simulated Control Carrier.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (14 of 23) Model 3830 AT Commands &Sn DSR Control Data Set Ready (DSR) is a signal from the modem to the DTE indicating the modem is connected and ready for operation. &S0 Forced On. Forces DSR output ON constantly. This is usually used for leased-line applications and when the DTE requires DSR to always be ON. &S1 Standard EIA-232. Modem controls DSR to the DTE. The modem raises DSR when it begins the handshake process. DSR lowers upon disconnect.
4. AT Command Set and S-Registers Table 4-2 (15 of 23) Model 3830 AT Commands &Tn Tests &T0 Abort. Stops any test in progress. &T1 Local Analog Loop. &T2 Pattern. Transmits and receives a 511 Bit Error Rate Test (BERT). *&T3 Local Digital Loopback test. &T4 Enables Receive Remote Loopback Response configuration option. &T5 Disables Receive Remote Loopback Response configuration option. *&T6 Remote Digital Loopback test. *&T7 Remote Digital Loopback with Pattern. &T8 Local Loopback with Pattern.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (16 of 23) Model 3830 AT Commands &Vn View Configuration Options Displays each configuration group within the Active (Operating), Active (Saved), Customer 1, and Customer 2 configuration areas as well as the telephone numbers stores in directory locations 1–10. &V0 Active (Operating) configuration options. &V1 Active (Saved) configuration options. &V2 Customer 1 configuration options. &V3 Customer 2 configuration options. &V4 Directory locations 1–10.
4. AT Command Set and S-Registers Table 4-2 (17 of 23) Model 3830 AT Commands &Zn =x Store Telephone Numbers Modem saves the telephone number and dial command modifiers (if any) entered for x (up to 40 characters in length) in Directory Location n (1–10). The DS command dials numbers stored this way. For example, the command AT&Z1=5551234 stores the telephone number 555 –1234 into directory location 1.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (18 of 23) Model 3830 AT Commands \Cn Error Control Negotiate Buffer Determines if the answering modem buffers the data that it received from the remote modem during an interval in which the modem attempts to establish a connection using error control. Online changes to this configuration option do not take effect until a disconnect occurs. \C0 Disable. \C1 Enable. \C2 Disable and Switch.
4. AT Command Set and S-Registers Table 4-2 (19 of 23) Model 3830 AT Commands \Kn Buffer Control, Send Break Control, Break Forces Escape The \Kn command sets three configuration options simultaneously: \K0 \K1 \K2 \K3 \K4 \K5 \K6 Break Buffer Control Discard Data Discard Data Keep Data Keep Data Keep Data Keep Data Discard Break Send Break Control Break First Break First Break First Break First Data First Data First Not Applic.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (20 of 23) Model 3830 AT Commands Nn Error Control Mode Determines the type of error control used by the modem. In most cases, V42/MNPorBfr is the best choice. If V.42bis and MNP are enabled, then the modem uses the following priority for error control negotiation: V.42bis, V.42, MNP 5 and below. Online changes do not take effect until a disconnect occurs. \ N0 Buffer Mode. \ N1 Direct Mode. \ N2 MNP or Disconnect. \ N3 MNP or Buffer. \ N4 V.
4. AT Command Set and S-Registers Table 4-2 (21 of 23) Model 3830 AT Commands \Tn No Data Disconnect Timer Forces the modem to disconnect if no data is transmitted or received within a specified amount of time. \T0 Disable. \Tn Where n is a value from 1 to 255 in 1-minute increments. \ Xn XON/XOFF Passthrough Flow Control The way this configuration option functions depends on how the modem is configured for flow control.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-2 (22 of 23) Model 3830 AT Commands %Bn Modulation and Data Rate Sets the modulation and maximum VF rate. The %B300 and %B1200 commands work in conjunction with the B (ITU-T/ Bell Mode) command to determine modulation. %B19200 V.32terbo, maximum rate 19,200 bps %B16800 V.32terbo, maximum rate 16,800 bps %B14400 V.32bis, maximum rate 14,400 bps %B12000 V.32bis, maximum rate 12,000 bps %B9600 V.32bis/V.32, maximum rate 9600 bps %B7200 V.
4. AT Command Set and S-Registers Table 4-2 (23 of 23) Model 3830 AT Commands %Cn MNP5 Data Compression Determines if the modem uses MNP Class 5 data compression. It can be set independently of V.42bis data compression. Online changes do not take effect until a disconnect occurs. %C0 Disable. %C1 Enable. %Rn DTE Rate Sets the rate at which data is passed between the modem and the DTE. %R must be the last command on the command line.
COMSPHERE 3800 Series Modems – Model 3830 S-Register List S-Registers affect the operating parameters of the Model 3830 modem. These registers are applicable only when the DTE Dialer Type configuration option is set for AT. (See &Mn and &Qn commands.) S-Registers can be displayed and/or modified when the modem is in Command mode. To display the value of an S-Register, issue the following command: TYPE: ATSn? Where: n is the register number.
4. AT Command Set and S-Registers Table 4-3 (2 of 20) Model 3830 S-Registers S2 AT Escape Character Determines ASCII value used for escape sequence to enter Command mode from Data mode. Enter a value from 0 to 127 for the escape character. Any value greater than 127 causes the modem to disable the escape sequence. When the escape sequence is disabled, the modem cannot return to Command mode until the call is disconnected. Factory setting is 43 (ASCII + sign).
COMSPHERE 3800 Series Modems – Model 3830 Table 4-3 (3 of 20) Model 3830 S-Registers S6 Blind Dial Pause Determines how long (in seconds) the modem waits after going off-hook before dialing a telephone number if using result code X0, X1, or X3. Enter a value from 2–255 seconds. Factory setting is 2 seconds. S7 No Answer Timeout Determines how long (in seconds) an originating modem waits before abandoning a call when no answer tone is received. Enter a value from 1–255 seconds.
4. AT Command Set and S-Registers Table 4-3 (4 of 20) Model 3830 S-Registers S18 Test Timeout Sets the duration (in seconds) for the modem tests. This automatically cancels any test in progress after the time of this register expires. Any test can be manually canceled by issuing the escape sequence (+++) followed by the &T0 command. Enter a value from 0–255 seconds. (A value of 0 disables this register.) Factory setting is Disable (0).
COMSPHERE 3800 Series Modems – Model 3830 Table 4-3 (5 of 20) Model 3830 S-Registers S35 Auto Redial (Leased Line) Auto Redial allows repeated automatic dial backup attempts by specifying the range of Directory Locations that can be tried. A redial attempt is made in response to a bad phone number, a busy signal, no answer, or no quiet answer. The modem must be in Originate mode.
4. AT Command Set and S-Registers Table 4-3 (6 of 20) Model 3830 S-Registers S37 Auto Redial Works in conjunction with the Bad Lines Auto Originate and Rate Auto Originate options. It allows repeated automatic dial backup attempts by specifying the range of Directory Locations that can be tried. The modem must be in Originate mode.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-3 (7 of 20) Model 3830 S-Registers S39 Receive Buffer Disconnect Delay Determines the maximum amount of time the modem can continue to send data in its Receive Buffer to the DTE after the modem is commanded by the DTE to disconnect, or after the modem detects a line disconnect.
4. AT Command Set and S-Registers Table 4-3 (8 of 20) Model 3830 S-Registers S43 V.32bis Train Register controls the modem’s train time for V.32bis/V.32 mode. Register has the following values: 0 = Long (A long train is required for satellite links which have long roundtrip delays.) 1 = Short Factory setting is Long. S44 Leased-Line Rate Determines the modem’s highest data rate and modulation scheme for operation on 2-wire leased lines in either Answer or Originate mode.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-3 (9 of 20) Model 3830 S-Registers S46 Bad Lines Auto Originate Register determines if the modem performs an automatic dial backup if the leased lines fail. Register has the following values: 0 = Disable 1 = 30 seconds 2 = 20 seconds 3 = 60 seconds 4 = 90 seconds 5 = 120 seconds S S S S 21 = 600 seconds Factory setting is Disable. Note that the S46 = 2 command has an effect that is out of sequence with the other values.
4. AT Command Set and S-Registers Table 4-3 (10 of 20) Model 3830 S-Registers S48 Leased Line Carrier On Level Determines if the modem disconnects if the carrier signal on leased lines falls below –26 dBm or –43 dBm. Register has the following values: 0 = –43 dBm 1 = –26 dBm Factory setting is –43 dBm. S49 Transmit Buffer Disconnect Delay Determines the maximum amount of time the modem can continue to send data in its Transmit Buffer to the remote modem after it is commanded by the DTE to disconnect.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-3 (11 of 20) Model 3830 S-Registers S52 DTE Local Loopback (CT141) Determines if the modem performs a local analog loopback if it receives a CT141 signal from the DTE. Register has the following values: 0 = Disable 1 = Enable Factory setting is Disable. S53 V.54 Address Identifies the address of the modem to be placed in a loopback test. Register has the following values: 0 = Disable 1–34 = Modem address Factory setting is Disable. S54 V.
4. AT Command Set and S-Registers Table 4-3 (12 of 20) Model 3830 S-Registers S57 Remote Access Password Register allows entry of the second of digits of a remote access password. Any value from 00 to 99 is valid. For example, if the remote access password is 12345678, then S57=34. S58 Remote Access Password Register allows entry of the third of digits of a remote access password. Any value from 00 to 99 is valid. For example, if the remote access password is 12345678, then S58=56.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-3 (13 of 20) Model 3830 S-Registers S62 V.25bis Coding Identifies to the modem the type of coding used by the DTE while in V.25bis mode. Register has the following values: 0 = ASCII 1 = EBCDIC Factory setting is ASCII. S63 V.25bis Idle Character Identifies to the modem the type of idle fill used by the DTE while in V.25bis mode. Register has the following values: 0 = Mark 1 = Flag Factory setting is Mark. S64 V.
4. AT Command Set and S-Registers Table 4-3 (14 of 20) Model 3830 S-Registers S65 Line Current Disconnect Determines if the modem disconnects if an interruption in loop current greater than 8 milliseconds or 90 milliseconds occurs. Register has the following values: 0 = Enable (8 msec) 1 = Enable (90 msec) 2 = Disable Factory setting is Enable (8msec).
COMSPHERE 3800 Series Modems – Model 3830 Table 4-3 (15 of 20) Model 3830 S-Registers S69 Make Busy Via DTR Determines if the modem goes off-hook (busy) when DTR is Off. Register has the following values: 0 = Disable 1 = Enable Factory setting is Disable. S74 Network Position Identification Register identifies each modem as either a control or tributary modem. Register has the following values: 0 = Tributary 1 = Control Factory setting is Tributary.
4. AT Command Set and S-Registers Table 4-3 (16 of 20) Model 3830 S-Registers S77 DTR Alarm Reporting Register determines whether an alarm is sent to the 6800 Series Network Management System controller when the DTR signal has been Off for more than 10 seconds. Register has the following values: 0 = Disable 1 = Enable S78 V.32bis Automode (Dial Line) If enabled, automode permits the modem to automatically connect to a remote modem using any supported modulation scheme.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-3 (17 of 20) Model 3830 S-Registers S80 No Data Disconnect Trigger Signal Register determines whether Pin 2 (transmit data) or Pin 3 (receive data) of the modem’s EIA-232 serial interface is monitored so that the modem can disconnect the call if there is no activity for a certain period. (See the \T command.) Register has the following values: 0 = Transmit or Receive 1 = Transmit only 2 = Receive only 3 = Transmit and Receive Factory setting is 3.
4. AT Command Set and S-Registers Table 4-3 (18 of 20) Model 3830 S-Registers S84 AT Command Mode Determines how the modem responds to valid and invalid AT commands. The selections No ERROR and No Strap or ERROR permit installation into applications that are customized for a different modem. Register has the following values: 0 =Normal. 1 =No ERROR. The modem executes all valid commands, ignores invalid commands, and never issues an ERROR message. 2 =No Strap or ERROR.
COMSPHERE 3800 Series Modems – Model 3830 Table 4-3 (19 of 20) Model 3830 S-Registers S89 V.42 ARQ Window Size Increase Register allows the V.42 Automatic Request for Transmission (ARQ) window size to be set to a value from 6 to 15 frames to accommodate satellite delays. Register has the following values: 0 = 6 frames (default) 1 = 7 frames 2 = 8 frames 3 = 9 frames D D D D 9 =15 frames This command applies only to connections made using V.42bis data compression or V.42 error control.
4. AT Command Set and S-Registers Table 4-3 (20 of 20) Model 3830 S-Registers S91 Cellular Enhancements Valid only if Enhanced Throughput Cellular (ETC) is installed. Register determines whether parameters are set to improve performance over a cellular link. Should be enabled when the remote modem is using a cellular connection. Register has the following values: 0 = Disable 1 = Enable Factory setting is Disable; &F5 and &F6 set S91 to Enable.
COMSPHERE 3800 Series Modems – Model 3830 4-50 August 1998 3830-A2-GB91-30
Troubleshooting A Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 Overview This appendix points out basic problems that can occur when operating a 3830 modem. Use Tables A-1 through A-5 to check out these problems. If you are having data communication difficulties, such as periodic character loss, random errors, or constant format errors, use the loopback tests associated with the &T command.
COMSPHERE 3800 Series Modems – Model 3830 Table A-1 Modem Health Symptom Action Modem did not pass power-up self-test Contact your customer service representative. Power LED does not light g Make sure the modem’s ON/Off switch is in the ON position. Make sure the ac power transformer is connected to the ac power receptacle. If the Power LED does not operate, contact your customer service representative. A problem is suspected after the power-up self-test Perform a self-test using the AT&T9 command.
A. Troubleshooting Table A-2 Modem – DTE Connection Symptom Action Modem does not accept or echo back AT commands Verify that the cable between the Async port of the DTE and the modem is a standard EIA-232 cable. If the cable is bad, replace it. (Null modem cables, also known as crossover cables, do not work in this application.) Reload the Async Dial factory configuration area to guarantee that all configuration options are returned to their proper setting.
COMSPHERE 3800 Series Modems – Model 3830 Table A-3 (1 of 4) Modem – VF Connection Action Symptom Modem does not receive a dial tone Attach the telephone directly to the wall outlet to verify that a dial tone exists. Make sure the VF line is connected to the modem’s rear jack labeled Dial. Modem does not go off-hook and answer an incoming call Verify that the Auto-Answer Ring Count configuration option (S-Register 0) is set to a value other than 0 (disable).
A. Troubleshooting Table A-3 (2 of 4) Modem – VF Connection Symptom Modem goes off-hook, answers, but does not connect (continued) Action Verify that originating modem supports your modem’s modulation schemes. The 3830 modem recognizes V.32terbo, CCITT V.32bis, V.32, V.22bis, V.22, V.21, Bell 212A, and Bell 103J. The 3800 Series modem does not support other vendors’ proprietary modulation schemes. Use the S41 register to force your modem to operate at the same modulation scheme as the originating modem.
COMSPHERE 3800 Series Modems – Model 3830 Table A-3 (3 of 4) Modem – VF Connection Symptom Action Modem does not go off-hook and begin dialing (continued) If using V.25bis HDLC, verify that the correct character format uses flag, address, and control characters before the text block and a frame sequence check and flag after the text block. Modem dials but does not connect If the modem is operating behind a PBX, verify if a 9 and comma are needed before the telephone number.
A. Troubleshooting Table A-3 (4 of 4) Modem – VF Connection Symptom Modem establishes and disconnects a call (continued) Action The remote modem may be in a forced Error Control mode (disconnect if there is no error control). Reconfigure your modem to V.42/MNP or Buffer and try again. Perform a Local Analog Loopback test to check the modem’s hardware operation. High error rates occur when running a local loopback or self-test. Incoming rings can cause data errors during a loopback test.
COMSPHERE 3800 Series Modems – Model 3830 Table A-5 Leased-Line Operation Symptom Modems do not train-up on leased lines Action Verify that the correct cabling is used for your application. Refer to Chapter 2 for modem installation instructions. Verify that one modem is configured for Answer mode and the other is configured for Originate mode.
Technical Specifications B Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1 Technical Specifications Table B-1 shows the technical specifications for the Model 3830 modem. Table B-1 (1 of 4) Model 3830 Technical Specifications Description Specifications APPROVALS (115 Vac, 60 Hz only) FCC Part 15 Class A FCC Part 68 Registration Number: (See label on modem) UL Listed to UL 1950 CSA Certified to CSA C22.2 No.
COMSPHERE 3800 Series Modems – Model 3830 Table B-1 (2 of 4) Model 3830 Technical Specifications Specifications COMPATIBILITY Description DIAL-LINE MODULATIONS V.32terbo (19,200, 16,800 bps) ITU-T V.32bis (14,400, 12,000, 9600, 7200, 4800 bps) ITU-T V.32 (9600, 4800 bps) ITU-T V.22bis (2400 bps) ITU-T V.22 (1200 bps) ITU-T V.21 (300 bps) Bell 212A (1200 bps) Bell 103J (300 bps) LEASED-LINE MODULATIONS V.32terbo (19,200, 16,800 bps) ITU-T V.32bis (14,400, 12,000, 9600, 7200, 4800 bps) ITU-T V.
B. Technical Specifications Table B-1 (3 of 4) Model 3830 Technical Specifications Specifications POWER CONSUMPTION Description 5.25 watts (typical, including power transformer, speaker off) DIMENSIONS Weight 2.5 pounds (1.14 kg) (not including power transformer) Height 2.1 inches (5.4 cm) Width 7.6 inches (19.4 cm) Depth 12.1 inches (30.
COMSPHERE 3800 Series Modems – Model 3830 Table B-1 (4 of 4) Model 3830 Technical Specifications Specifications Description DATA RATES Dial Line 19,200, 16,800, 14,400, 12,000, 9600, 7200, 4800, 2400, 1200, or 300–0 bps. Leased Line 19,200, 16,800, 14,400, 12,000, 9600, 7200, or 4800 bps Fax 14,400, 12,000, 9600, 7200, 4800, or 2400 bps DTE 115,200–300 bps ERROR CONTROL ITU-T V.42 MNP 4-2 DATA COMPRESSION ITU-T V.
Pin Assignments C EIA-232-D Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1 VF Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3 EIA-232-D Pin Assignments Table C-1 lists the EIA-232-D pin assignments for the modem.
COMSPHERE 3800 Series Modems – Model 3830 Table C-1 (2 of 3) EIA-232-D Pin Assignments RS-232 Pin Name EIA Circuit CCITT Signal Source Circuit Function 9 +10V – – – Reserved for test purposes (may be used to drive one RS-232 load) 10 –10V – – – Reserved for test purposes (may be used to drive one RS-232 load) 11 – – – – Unassigned 12 CT112 CI 112 DCE 13 – – – – Reserved for future function 14 – – – – Reserved for future function 15 TXC DB 114 DCE Transmit Clock
C.
COMSPHERE 3800 Series Modems – Model 3830 The Model 3830 provides the 2-wire leased-line signals on the same leads used for Tip and Ring when in Dial mode. To connect the modem to a standard JM8 leased-line jack, a conversion cable (125-0054-1531) must be used. Note that for 2-wire leased-line operation, the yellow and black leads are not used. The wiring of this cable is illustrated in Figure C-1. Figure C-1.
C. Pin Assignments Table C-2 illustrates the connector pin assignments for Model 3830 modular jacks as well as the pin assignments for the leased-line jacks.
COMSPHERE 3800 Series Modems – Model 3830 C-6 August 1998 3830-A2-GB91-30
ITU-T V.25bis Dialing Commands and Response D Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call Request Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call Request with Number Provided (CRN) . . . . . . . . . . . . . . . . . . . . . . . Call Request with Stored Memory Address Provided (CRS) . . . . . . . . . . Call Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3800 Series Modems – Model 3830 The following section discusses those V.25bis commands supported by the Model 3830 modem and the responses to those commands. Tables D-1 and D-2 in the Command Response section list the V.25bis command and response and the analogous AT command. NOTE The Model 3830 modem must be configured for V.25bis dialing. Refer to the &M or &Q commands listed in Chapter 4, AT Command Set and S-Registers.
D. CCITT V.25 bis Dialing Commands and Response Call Request with Number Provided (CRN) The CRN command dials the telephone number entered from the DTE. CRN is similar to the ATD command. The CRN command format is: CRNn Where: n is the dial string.
COMSPHERE 3800 Series Modems – Model 3830 Call Failure Indication (CFI) The CFI response is issued to the DTE if the modem fails a CRN or CRS command. CFI is similar to the AT result codes BUSY, NO ANSWER, NO CARRIER, NO DIALTONE, and ERROR.
D. CCITT V.25 bis Dialing Commands and Response Call Answer Commands Call Answer commands disable or enable the modem’s AutoAnswer function. These commands are issued from the DTE. Call Answer commands include Incoming Call (INC), Disregard Incoming Call (DIC) and Connect Incoming Call (CIC). Incoming Call (INC) The INC response informs the DTE that the modem has detected a ring tone. At this point, the DTE can issue the DIC command to disable the modem from answering the call.
COMSPHERE 3800 Series Modems – Model 3830 Program Normal (PRN) The Program Normal (PRN) command allows the DTE to enter and store a telephone number to a specific directory location. PRN is similar to the AT&Z command. The PRN command format is: PRNx;n Where: x is the directory location 1–10; n is the telephone number. Request List of Stored Numbers (RLN) The Request List of Stored Numbers (RLN) command displays telephone numbers stored in the modem’s directory location.
D. CCITT V.25 bis Dialing Commands and Response Command Response A Command Response indicates that the command entered was a valid or invalid entry. Command Response includes Valid (VAL) and Invalid (INV). Valid (VAL) The VAL response indicates that the modem has accepted the V.25bis command issued by the DTE. VAL is similar to the AT result code OK. Invalid (INV) The INV response indicates that the modem has received an incorrect V.25bis command from the DTE. INV is similar to the AT result code ERROR.
COMSPHERE 3800 Series Modems – Model 3830 Table D-1 V.25bis Commands V.
D. CCITT V.25 bis Dialing Commands and Response Table D-2 lists V.25bis response messages supported by the Model 3830 modem. Table D-2 V.25bis Response Messages V.
COMSPHERE 3800 Series Modems – Model 3830 D-10 August 1998 3830-A2-GB91-30
Glossary Active (Operating) A configuration area containing configuration options currently in use by the modem. When a power cycle occurs, a reset is performed, or a save is issued, this area is updated with the contents of Active (Saved). Active (Saved) A nonvolatile configuration area containing the most recently saved configuration options. Any changes made to configuration options can be saved by issuing an AT&W0 command. analog loop See local analog loop.
COMSPHERE 3800 Series Modems – Model 3830 asynchronous transmission A data transmission that is synchronized by a transmission start bit at the beginning of a character (five to eight bits) and one or more stop bits at the end. AT command set A group of commands, issued from an asynchronous DTE, that allow control of the modem while in Command mode. All commands must begin with the characters AT and end with a carriage return.
Glossary buffer A storage device used to compensate for differences in the data flow rate when transmitting data from one device to another. byte A sequence of successive bits (usually eight) handled as a unit in data transmission. character A letter, figure, number, punctuation, or other symbols. character echo A way to check the accuracy of data transmission by sending (displaying) all the characters being transmitted to the monitor. Class 1 fax A fax modem standard.
COMSPHERE 3800 Series Modems – Model 3830 Customer 1 A user-defined configuration area containing customized configuration options for a specific application. Customer 2 A user-defined configuration area containing customized configuration options for a specific application. data carrier A continuous frequency signal that can be modulated by another signal that contains information to be transmitted.
Glossary dial line A communications circuit that is established by a switched circuit connection in the dial network. dial network See PSTN. dial string A series of characters that consists of numbers and modifiers used to dial a telephone number. digital signal A signal composed of only two discrete values, representing the binary digits 0 and 1. directory location Nonvolatile memory that stores up to ten telephone numbers. Each directory location can have up to 40 characters entered.
COMSPHERE 3800 Series Modems – Model 3830 error control An algorithm used to correct data transmission errors. escape sequence Default setting is +++. This sequence lets you switch your modem from Data mode to Command mode. extended result codes An asynchronous message (in either numbers or words) that includes VF data rate and error control information the modem sends to the DTE after executing or trying to execute a command. fax modem A modem capable of emulating some features of a fax machine.
Glossary Hz A unit of frequency (hertz) that equals one cycle per second. ITU-T The Telecommunications Standardization Sector of the International Telecommunications Union, an advisory committee established by the United Nations to recommend communications standards and policies. Before March 1993 it was called CCITT. ITU-T V.17 A fax communications standard for modems operating half-duplex with synchronous data at 14,400 bps. ITU-T V.
COMSPHERE 3800 Series Modems – Model 3830 ITU-T V.42 ITU-T standard for error control protocol. ITU-T V.42 bis ITU-T standard for data compression. ITU-T V.54 ITU-T standard for local and remote diagnostic loopback tests. JM8 A jack used for leased-line networks. Pins 1 and 2 are the transmit pair and Pins 7 and 8 are the receive pair. leased line A private line connection exclusively for the user. No dialing is necessary. LED Light-Emitting Diode.
Glossary modulation The process of varying some characteristics (usually amplitude, frequency, and/or phase) of a carrier wave to form data transmissions. off-hook A telephone or modem is being used. on-hook A telephone or modem is not being used. Originate mode The modem is in a state where it is ready to transmit a call. In a dial network, it is the modem that makes the call. In a leased-line network, it is one of two sides of the network that is selected to be the originating modem.
COMSPHERE 3800 Series Modems – Model 3830 PSTN Public Switched Telephone Network. A network shared among many users who can use telephones to establish connections between two points. Also known as dial network. pulse dialing One of two dialing methods, in which telephone numbers are sent as pulses (brief changes in voltage or current intensity) across the telephone line. Rotary telephones use pulse dialing.
Glossary tone dialing One of two dialing methods, in which telephone numbers are sent as tones across the telephone lines. training A process where two modems try to establish a connection over the VF line. UL Underwriter’s Laboratories, Inc. UNIX Dial A factory preset configuration area containing the configuration options most often used in a UNIXr dial network. USOC Universal Service Ordering Codes. VF Voice Frequency.
COMSPHERE 3800 Series Modems – Model 3830 Glossary-12 August 1998 3830-A2-GB91-30
Index ! (hook flash), 4Ć9 ," dial modifier (Pause), 4Ć8 ," Pause Time (S8), 4Ć32 ;" (return to command mode), 4Ć9 @ (quiet answer), 4Ć9 1800 Hz Training Tone (S34), 4Ć33 220-240V power transformer, 2Ć2, 2Ć5 A/ (Repeat Last Command), 4Ć7 ac power, 2Ć5 Answer mode (ATA), 4Ć7 Async/Sync Mode (AT&M), 4Ć18 AT commands "H (V.42bis Compression), 4Ć29 &C (LSD Control), 4Ć14 &D (DTR Action), 4Ć15 &F (Factory Defaults), 4Ć15 &G (V.
COMSPHERE 3800 Series Modems – Model 3830 &Q (Async/Sync Mode and DTE Dialer Type), 4Ć18 &R (RTS Action), 4Ć19 &S (DSR Control), 4Ć20 &T (Tests), 4Ć21 &V (View Configuration Options), 4Ć22 &W (Write to Memory), 4Ć22 &X (Transmit Clock Source), 4Ć22 &Z (Store Telephone Number), 4Ć23 %A (Error Control Fallback Character), 4Ć27 %B (Modulation and Data Rate), 4Ć28 %C (MNP5 Data Compression), 4Ć29 %R (Sets DTE Rate), 4Ć29 *** (Command Recovery), 4Ć7 \A (Maximum Frame Size), 4Ć23 \C (Error Control Negotiate Buff
Index Auto Dial Standby (S47), 4Ć38 Auto Originate, 4Ć38 Auto Redial (Leased Line), 4Ć34 Auto Redial (S37), 4Ć35 autoĆanswer problems, AĆ4 automatic redialing, 4Ć35 automode (S78), 4Ć45 autorate S76 Dial Line, 4Ć44 S82 Leased Line, 4Ć46 Bad Lines Auto Originate (S46), 4Ć38 Bell Mode, 4Ć7 blind dial pause (S6), 4Ć32 blind dialing, 4Ć12 Break Buffer Control (AT\K), 4Ć25 Break Forces Escape (AT\K), 4Ć25 busy tone detect (ATX), 4Ć12 Call Answer commands (V.25bis), DĆ5 Call Request commands (V.
COMSPHERE 3800 Series Modems – Model 3830 character format, 4Ć3 problems, AĆ3, AĆ7 clock source (AT&X), 4Ć22 command echo, 4Ć9, AĆ3 Command mode, 4Ć1 Command Response (V.25bis), DĆ7 compression MNP5, 4Ć29 V.
Index dialing problems, AĆ5 Directory Location 1 Callback (S67), 4Ć43 Disconnect Delay Receive Buffer, 4Ć36 Transmit Buffer, 4Ć39 display configuration options, 4Ć22 SĆRegister, 4Ć11 DSR Control (AT&S), 4Ć20 DTE connection, 2Ć4 DTE Rate CT111 Rate Control, 4Ć41 problems, AĆ3 set to VF rate, 4Ć48 DTE rate, in result codes, 4Ć12 DTR Alarm Reporting (S77), 4Ć45 make busy via (S69), 4Ć44 DTR Action (AT&D), 4Ć15 echo command, 4Ć9 EIAĆ232ĆD cable, 2Ć2 EIAĆ232ĆD pin assignments, CĆ1 Enhanced Throughput Cellula
COMSPHERE 3800 Series Modems – Model 3830 Escape Guard Time, 4Ć2, 4Ć32 escape sequence (+++), 4Ć1, 4Ć2, 4Ć31 ETC (Enhanced Throughput Cellular), 4Ć49 extended result codes (ATX), 4Ć12 Fast Disconnect, 4Ć47 fax Class 2, 3Ć1 EIA/TIAĆ592 standard, 3Ć1 operation, 3Ć1 software settings, 3Ć2 features, 1Ć2 ferrite choke on DTE cable, 2Ć4 on power transformer cable, 2Ć6 firmware revision number, 4Ć10 flow control AT\Q command, 4Ć26 DTE to modem, 4Ć26 modem to DTE, 4Ć26 modem to modem, 4Ć24 problems, AĆ7 frame s
Index Identification (ATI), 4Ć10 initialization strings, 2Ć11 DATAKIT, 2Ć12 synchronous leasedĆline applications, 2Ć12 V.
COMSPHERE 3800 Series Modems – Model 3830 SĆRegisters, 4Ć30 Modulation and Data Rate (%B), 4Ć28 modulation problems, AĆ5 modulations supported, BĆ2 Network Management Address (S75), 4Ć44 Network Position Identification (S74), 4Ć44 NMS (COMSPHERE 6700 Series NMS), 1Ć2 NMS Call Messages (S66), 4Ć43 No Carrier Disconnect (S10), 4Ć32 No Data Disconnect Trigger Signal, 4Ć46 operating modes, 4Ć1 P (Pulse dial), 4Ć8 password, Remote Access, 4Ć40, 4Ć41 pin assignments RSĆ232, CĆ1 VF connector, CĆ3 Power L
Index R (Reverse dial), 4Ć9 Rate Auto Originate (S36), 4Ć34 Rate Control (CT111), 4Ć41 recovering use of AT commands, 2Ć9 redialing, automatic, 4Ć35 remote access (S55), 4Ć40 Remote Access Password (S56-S59), 4Ć40, 4Ć41 Repeat Last Command (A/), 4Ć7 reset (ATZ), 4Ć13 Result Code Control (ATQ), 4Ć11 result codes, 4Ć4 extended, 4Ć12 Result Codes Format (ATV), 4Ć11 retrain (S81), 4Ć46 return to command mode, 4Ć9 return to Online mode (ATO), 4Ć10 ring number (S0), 4Ć30 RTS Action (&R), 4Ć19 RTSĆtoĆCTS Delay
COMSPHERE 3800 Series Modems – Model 3830 S34 (1800 Hz Training Tone), 4Ć33 S35 (Auto Redial, Leased Line), 4Ć34 S36 (Rate Auto Originate), 4Ć34 S37 (Auto Redial), 4Ć35 S38 (DTR Cont Repeat), 4Ć35 S39 (Receive Buffer Disconnect Delay), 4Ć36 S4 (Line Feed Character), 4Ć31 S41 (Dial Line Rate), 4Ć36 S43 (V32bis Train), 4Ć37 S44 (Leased Line Rate), 4Ć37 S45 (Leased Line Transmit Level), 4Ć37 S46 (Bad Lines Auto Originate), 4Ć38 S47 (Auto Dial Standby), 4Ć38 S48 (Leased Line Carrier On Level), 4Ć39 S49 (Transm
Index S88 (Straps When Disconnected), 4Ć47 S89 (V.42 ARQ Window Size Increase), 4Ć48 S90 (DTE Rate = VF Rate), 4Ć48 S91 (Cellular Enhancements), 4Ć49 S92 (V.
COMSPHERE 3800 Series Modems – Model 3830 V.25bis applications, 2Ć11 V.25bis Coding (S62), 4Ć42 V.25bis dialing, 4Ć18 V.25bis dialing comands, DĆ1 V.25bis Idle Character (S63), 4Ć42 V.25bis New Line Character, 4Ć42 V.29 Train On Data (S92), 4Ć49 V.32bis Automode (S78), 4Ć45 V.32bis Autorate (Dial Line), 4Ć44 V.32bis Autorate (Leased Line), 4Ć46 V.32bis Train (S43), 4Ć37 V.32terbo, 1Ć1 V.42 ARQ Window Size (S89), 4Ć48 V.42bis Compression (AT"H), 4Ć29 V.54 Address (S53), 4Ć40 V.
