Paradyne 3920PLUS, 3921PLUS B

B-13920-A2-GN31-30 November 1996

Troubleshooting

Overview B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview

This appendix points out basic problems that can occur when operating a 392xPlus

modem. Use

Tables B-1 through B-6 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 described in the

T

est

section of Chapter 4. W

ith these tests you can usually isolate

the fault in your system by using the process of elimination. If problems continue to occur,

contact your service representative.

Table B-1

Modem Health

Symptom Action

The modem did not pass the

power-up self-test. Contact your service representative.

The power LED does not light or the

LCD does not display information. Make sure the modem’s ON/OFF switch is in the ON position.

Make sure the power supply is connected to the dc power receptacle on the

modem.

If the Power LED and/or LCD do not operate, contact your service

representative.

A problem is suspected after the

power-up self-test. Perform a self-test via the modem’s DCP or type AT&T9 if using AT commands.

Perform a local analog loopback with a Pattern test. If the modem consistently

registers errors, contact your service representative.

If the modem passes the above tests and a problem still exists, then the

problem is probably not with your modem.

B

Contents

Main COMSPHERE 392x Modems Models 3920 and 3921 Warranty, Sales, and Service Information Trademarks Important Safety Instructions Notices Table of Contents Preface 1. Introduction 2. Modem Installation 3. DCP Operation 4. DCP Configuration 5. AT Command Set and S-Registers 6. Dial Access Security Appendices Glossary Index List of Figures List of Tables Page Preface Objectives and Reader Assumptions How to Use This Manual Related Documents Introduction COMSPHERE 392x Models Model 3920 Standalone Model 3920 Plus Model 3920 s Singleport and Multiport Housing Singleport Modem Back Panel Multiport Modem Back Panel Model 3921 Carrier-Mounted Singleport Modem Model 3921 Carrier-Mounted Multiport Modem Introduction Plus 1-53920-A2-GN31-30 November 1996 Figure 1-2. Model 3921 Singleport Modem 1-6 November 1996 3920-A2-GN31-30 49614423a-0 3 Figure 1-3. Model 3921 Multiport Modem Operational Modes Features Singleport Features Multiport Features Applications Multipoint Dual-Leased Backup MSD Digital Bridge V.34 Modulation Multiport Backup Government Requirements and Equipment Return United States Canada Technical Specifications Plus Plus, shows the technical specifications for the 392x modems. Technical Specifications for 392x Modems Specifications Description Modem Installation Modem Package Customer-Supplied Equipment Model 3920 Modem Installation Connecting Cables to the Model 3920 Modem DTE Connection Power Supply Connection Leased-Line Connection Dial Connection Leased Backup Connection Dial Backup Connection Removing and Replacing the Model 3920 Modem Model 3921 Modem Installation Page Plus Plus Figure 2-3. Installing the Model 3921 Modem Page Page Removing and Replacing the Model 3921 Modem Selecting Factory Configuration Options for 392x Modem Power-Up Using the Diagnostic Control Panel (DCP) DCP Operation Diagnostic Control Panels Diagnostic Control Panel Faceplate and Shared Diagnostic Control Panel (SDCP) Status Indicators 3-4 November 1996 3920-A2-GN31-30 SDU Plus 3921 Figure 3-2. Optional SDCP and Model 3921 Faceplates Table 3-1 DCP LEDs Label Color Indicates Table 3-1 DCP LEDs Label IndicatesColor The SDCP LEDs are listed and described in Table 3-2. Table 3-2 SDCP LEDs Label Color Indicates Diagnostic Control Panel Operation LCD Display Hidden Choice Indicators Other Indicators Keypad Menu Structure Page Top-Level Menu Status and Operational Messages MR* EC** EC** MR* MR* EC** Status IndicatesMessage Call Setup Branch Page Page Quick Configuration Display Page DCP Operation 3-173920-A2-GN31-30 November 1996 Status Branch access Status from the T To Status op-Level menu, select Status. Device Health and Status (DeviceHS) Table 3-6 Health and Status Messages Type IndicatesMessage VF Displaying VF Conditions Clearing VF Counters Identity DTE V.34 Backup Page Options Record Service Log Configure Branch Poll List Branch Display Clear Change Add Acquire Control Branch Speaker Reset Data Stream Selecting All Ports EIA LEDs Make Busy/Remove Make Busy Service Line/Disconnect Service Line Download Software Selecting Clone Remote Clone Remote in Point-to-Point Configurations Clone Remote in Broadcast Configurations Page Clone Remote in Multipoint Configurations Page Page Implementing a Clone Remote Operation Page Automatic Firmware Download Automatic Firmware Download Failure VF Thresholds Update Page Page Test Branch Abort Self Loc Analog Loop Rem Digital Loop Page Loc Digital Loop Pattern Page Page Sub-Network Health and Status Branch Call Setup Branch Dial Disconnect Answer XX Dial Standby/Return to Dial Page Change Directory Entering Telephone Numbers and Dial Command Modifiers into Directory Locations Directory Status (may not appear for certain countries) Talk/Data Branch Manual Dialing When the Remote Modem is Configured for Auto-Answer Line Dialer Manual Dialing When the Remote Modem is Configured for Manual Answer Line Dialer Security Branch Remote Branch Page Page Page Diagnostic Control Panel Access DCP Configuration Page Configure Branch Editing and Saving a Configuration Option Page Page Summary Configuration T ables Multiport Mode l DCP Configuration Multiport Mode V.42/ MNP/ Buffer , V * MUX DTE Interface Multiport Mode l (2 of 9) (3 of 9) Port Rate Sub-Group (One for Each Port) (4 of 9) Port Async Sub-Group (One for Each Port) (5 of 9) Port EIA Sub-Group (One for Each Port) (6 of 9) (7 of 9) (8 of 9) (9 of 9) Extended Point-to-Point Line Dialer Multiport Mode l Table 4-2 Line Dialer Configuration Options Multiport Mode l Table 4-2 Line Dialer Configuration Options Multiport Mode l , Installation Manual COMSPHERE 3000 Series Carrier Dial Line Multiport Mode l Table 4-3 Dial Line Configuration Options Multiport Mode l Leased Line Multiport Mode l Table 4-4 Leased Line Configuration Options Multiport Mode l Table 4-4 Leased Line Configuration Options Multiport Mode l Test Multiport l Misc Multiport l Table 4-6 Miscellaneous Configuration Options Multiport Mode l Table 4-6 Miscellaneous Configuration Options Multiport Mode l Singleport Mode A 4-32 November 1996 3920-A2-GN31-30 DTE Interface DTE Dialer Does not appear on Singleport modems. Singleport Mode V.42/ MNP/Buffer Security MUX* DTE Interface Singleport Mode (2 of 8) (3 of 8) (4 of 8) (5 of 8) (6 of 8) (7 of 8) (8 of 8) DTE Dialer Singleport Mode (2 of 5) (3 of 5) AT Commands and S-Registers (4 of 5) AT Commands and S-Registers (5 of 5) Line Dialer Singleport Mode (2 of 4) (3 of 4) (4 of 4) Dial Line Singleport Mode Table 4-10 Dial Line Configuration Options Singleport Mode A Table 4-10 Dial Line Configuration Options Singleport Mode A Leased Line Singleport Mode (2 of 5) (3 of 5) (4 of 5) (5 of 5) V.42/MNP/Buffer Singleport Mode (2 of 6) (3 of 6) (4 of 6) (5 of 6) (6 of 6) Test Singleport Mode Table 4-13 Test Configuration Options Singleport Mode A Misc Singleport Mode Table 4-14 Miscellaneous Configuration Options Singleport Mode A z y z Security Singleport Mode Dial Access Security. AT Command Set and S-Registers Operating Modes Switching Between Data Mode and Online Command Mode Escape Sequence and Escape Guard Time Command Guidelines Result Codes Table 5-1 Result Codes Numbers (1) DescriptionWord Numbers (2) AT Command List AT Command Format (1 of 9) Command Description DCP LCD (2 of 9) Zn=x r n=r (3 of 9) Extended Result Code: Dial Tone Detect: Busy Tone Detect: (4 of 9) Default Configuration Options Page (6 of 9) (7 of 9) (8 of 9) n=x (9 of 9) S-Register List S-Register Format (1 of 12) S-Registers S-Register Description DCP LCD (2 of 12) S-Registers (3 of 12) S-Registers (4 of 12) S-Registers (5 of 12) S-Registers (6 of 12) S-Registers (7 of 12) S-Registers (8 of 12) S-Registers (9 of 12) S-Registers (10 of 12) S-Registers (11 of 12) S-Registers Page Page Page A-2 November 1996 3920-A2-GN31-30 Status Status Configure PList Menu T Test ree A-33920-A2-GN31-30 November 1996 Troubleshooting Page Table B-4 Modem DTE Connection Table B-5 Modem VF Connection DTE Dialer DTE Interface Line Dialer Table B-5 Modem VF Connection Set Orig Sec Set Answer Sec Test Branch Pin Assignments EIA-232-D Pin Assignments VF Connector Pin Assignments Page Page To connect a Model 3920 Figure C-4. Wiring Diagram 25-Pin Crossover Cable Plus port to another modems EIA-232-D interface, use a 25-pin crossover cable (Figure C-4). CCITT V.25bis Dialing Command and Responses D DCP Configuration Call Request Commands Call Request with Number Provided (CRN) Call Request with Stored Memory Address Provided (CRS) Call Response Call Failure Indication (CFI) Call Answer Commands Incoming Call (INC) Disregard Incoming Call (DIC) Connect Incoming Call (CIC) Program Normal (PRN) Request List of Delayed Numbers (RLD) Request List of Forbidden Numbers (RLF) Request List of Stored Numbers (RLN) List Delayed Numbers Response (LSD) List Forbidden Numbers Response (LSF) List Stored Number Response (LSN) Command Response Valid (VAL) Invalid (INV) Page E ASCII Character Table Page Page Page F Default Configuration Options (1 of 10) Factory Default Configuration Options (Multiport mode) (2 of 10) Factory Default Configuration Options (3 of 10) Factory Default Configuration Options (Singleport mode) (4 of 10) Factory Default Configuration Options (Singleport mode Contd) DTE Dialer l (5 of 10) Factory Default Configuration Options DTE Dialer l(Contd) Line Dialer (6 of 10) Factory Default Configuration Options Dial Line Lease Line (7 of 10) Factory Default Configuration Options Lease Line (Contd) (8 of 10) Factory Default Configuration Options V.42 / MNP / Buffer l (9 of 10) Factory Default Configuration Options Test Misc (10 of 10) Factory Default Configuration Options Security l G Sample Configurations Point-to-Point Figure G-1 shows a sample configuration for point-to-point applications. Figure G-1. Sample Configuration Point-to-Point Page Extended Point-to-Point Figure G-2 shows a sample configuration for extended point-to-point applications. Port TXC Source Set Port 4 to External. Figure G-2. Sample Configuration Extended Point-to-Point exceptions: TX Clock Source Set to RXC_Loop. Page Extended Multipoint Figure G-3. Sample Configuration Extended Multipoint B Figure G-3 shows a sample configuration for extended multipoint applications. Page Point-to-Point with Automatic Dial Backup Page Point-to-Point with Network Management Figure G-5 shows a sample configuration for point-to-point applications with network management. Figure G-5. Sample Configuration Point-to-Point with Network Management Rate Refer to the Sample Port Rate T Diag Connection Set to NMS(CC). NetworkPosition Set to Control. NetMngmtAddress Set to 1. Page Carrier with Network Management Figure G-6. Sample Configuration Carrier with Network Management Page Extended Diagnostics Adapter Digital Bridging Page Point-to-Point MSD Sample Port Rate Table: Point-to-Point MSD 3920Plus A Sample Port Rate Table: Point-to-Point MSD 3920Plus B Multipoint MSD Page H Equipment List Equipment Feature/ Part Number Glossary Page Page Page Page Page Page Page Page Page Index A B C D E F G H M N O P Q R S T W U V