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COMSPHERE
392xPLUS MODEMS
MODELS 3920PLUS AND
3921PLUS
INSTALLATION AND OPERATION
MANUAL
Document No. 3920-A2-GN31-30
November 1996
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COMSPHERE 392xPlus Modems COMSPHERE 392xPlus Modems Models 3920Plus and 3921Plus Installation and Operation Manual 3920-A2-GN31-30 4th Edition (November 1996) Changes and enhancements to the product and to the information herein will be documented and issued as a new release or a Firmware Update Description document to this manual. For the Model 3920Plus standalone modems, the Universal Service Order Code (USOC) for Permissive mode is RJ11C. The Canadian equivalent to RJ11C is CA11A. For the 39
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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 adapter. Prior to installation, use an outlet tester or a voltme
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COMSPHERE 392xPlus Modems Notices
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Table of Contents Preface Objectives and Reader Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . vii How to Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii 1. Introduction Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 COMSPHERE 392xPlus Models . . . . . . . . . . . . . . . . . . . . . . .
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COMSPHERE 392xPlus Modems Poll List Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30 Control Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35 Test Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-54 Sub-Network Health and Status Branch . . . . . . . . . . . . . . . . . . . . . . 3-64 Call Setup Branch . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents List of Figures Figure Page 1-1 Model 3920Plus Standalone Singleport and Multiport Modems . . . . . . . . . . . . . . . 1-3 1-2 Model 3921Plus Singleport Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 1-3 Model 3921Plus Multiport Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 2-1 Model 3920Plus Multiport Back Panel and Power Supply . . . . . . . . . . . . . . . . . . . . 2-4 2-2 Modem’s Back Connector P
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COMSPHERE 392xPlus Modems List of Tables Table Page 1-1 392xPlus Operational Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 1-2 Technical Specifications for 392xPlus Modems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 3-1 392xPlus DCP LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 3-2 SDCP LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contents Table Page B-6 Online Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5 B-7 Mux Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5 C-1 EIA-232-D Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2 C-2 VF Connector Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Preface Objectives and Reader Assumptions This manual describes how to install and operate the COMSPHERE Model 3920Plus standalone and Model 3921Plus carrier-mounted modems. Users of this manual must have a basic understanding of modems and their operation. How to Use This Manual Chapter 1 provides technical specifications, information about the four 392xPlus models, the modem features, and the government requirements for using these modems. Chapter 2 provides instructions for installing the 39
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COMSPHERE 392xPlus Modems Related Documents 3000-A2-GA31 COMSPHERE 3000 Series Carrier, Installation Manual 3610-A2-GZ45 3600 Hubbing Device, Feature Number 3600-F3-300, Installation Instructions 3920-A2-GK41 COMSPHERE 392xPlus Modems, Models 3920Plus and 3921Plus, Installation Instructions 3920-A2-GK40 COMSPHERE 3900 Series Modems, Model 3921Plus, Ferrite Choke Installation Instructions Call your sales representative to order additional product documentation. viii November 1996 3920-A2-GN31-30
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Introduction 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 COMSPHERE 392xPlus Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Model 3920Plus Standalone Singleport Modem . . . . . . . . . . . . . . . . . . . 1-2 Model 3920Plus Standalone Multiport Modem . . . . . . . . . . . . . . . . . . . . 1-2 Model 3921Plus Carrier-Mounted Singleport Modem . . . . . . . . . . . . . . 1-4 Model 3921Plus C
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COMSPHERE 392xPlus Modems COMSPHERE 392xPlus Models The COMSPHERE 392xPlus modem is available in the following four models: • Model 3920Plus standalone singleport modem (model no. 3920-A1-41x). • Model 3920Plus standalone multiport modem (model no. 3920-A1-40x). • Model 3921Plus carrier-mounted singleport modem (model no. 3921-B1-01x). • Model 3921Plus carrier-mounted multiport modem (model no. 3921-B1-00x). The last digit in the model number (x) varies, depending on whether the modem is equippe
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Introduction Model 3920Plus Singleport and Multiport Housing DIAGNOSTIC CONTROL PANEL LCD AND KEYPAD SPEAKER POWER SUPPLY STATUS POWER INDICATORS CORD Singleport Modem Multiport Modem Back Panel Back Panel POWER DTE 4 ON/OFF POWER DTE 3 ON/OFF POWER IN DTE 2 POWER IN NMS NMS DTE 1 DTE 1 DIAL DIAL LEASED LEASED 496-14684-01 Figure 1-1. Model 3920Plus Standalone Singleport and Multiport Modems 3920-A2-GN31-30 November 1996 1-3
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COMSPHERE 392xPlus Modems Model 3921Plus Carrier-Mounted Singleport Modem The Model 3921Plus is a carrier-mounted singleport modem (Figure 1-2) capable of either 4-wire/2-wire leased-line or dial operation. The modem installs into a COMSPHERE 3000 Series Carrier, occupying a single slot. The modem’s faceplate has sixteen (16) LED status indicators for displaying modem activity and an audio speaker jack for the carrier’s optional speaker. The modem’s back panel has two edge card connectors that
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Introduction FACEPLATE Status Pwr Alrm 142 Test Dial BACK CONNECTOR 125 RI PLATE Busy Serv EIA232/V.24 SQ CONNECTOR EIA232/V.24 EDGE CARD CONNECTOR 103 TXD 104 RXD 105 RTS GROUNDING 106 CTS TAB 107 DSR FUTURE 108 DTR USE 109 LSD Front Panel FUTURE USE Spkr 3921Plus 496-14178a-04 Figure 1-2. Model 3921Plus Singleport Modem 3920-A2-GN31-30 November 1996 1-5 RS366A/V.25 (3800) EIA232/V.24 V.35 (3600/3500)
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COMSPHERE 392xPlus Modems FACEPLATE Status Pwr Alrm EDGE CARD 142 Test CONNECTORS Dial 125 RI Busy Serv BACK SQ CONNECTOR 13 PLATES Port 24 PORT 103 TXD 1 104 RXD PORT 105 RTS 3 106 CTS 107 DSR 108 DTR 109 LSD Front Panel Spkr PORT 2 PORT 4 3921Plus 49614423a-03 Figure 1-3. Model 3921Plus Multiport Modem 1-6 November 1996 3920-A2-GN31-30 DTE B DTE A DTE B DTE A
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Introduction 392xPlus Operational Modes The 392xPlus operational modes determine how your modem performs in various applications. These operational modes are determined by your modem model and the selected configuration options. There are two operational modes: • Singleport mode. Operates on both the singleport and multiport modems. Singleport mode is the only operational mode for the singleport modem. For the multiport modem, it is in effect when the MUX mode configuration option is set to Disa
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COMSPHERE 392xPlus Modems • Network management system (NMS) support through the COMSPHERE 6800 or 6700 Series NMS using Advanced Diagnostic protocol (ADp). • Automatic and manual backup with standby capabilities for 4-wire/2-wire leased-line applications. (The backup facility may be either a 2-wire dial line or a 2-wire leased line.) 392xPlus Singleport Features Features specific to 392xPlus singleport modems are: • Four-wire/two-wire leased-line modulations. • Dial-line modulations. Refer to Ta
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Introduction Dual-Leased Backup Dual-Leased Backup is available in all 392xPlus modems. It enables a 2-wire leased line to be used as the backup facility instead of the normal 2-wire dial line. Plug the leased line into the jack labeled DIAL on the back panel of the modem (see Figure 2-1 in Chapter 2), and enable the Dual_Leased_Ln configuration option. (Refer to the Multiport Mode — Leased Line or the Singleport Mode — Leased Line section in Chapter 4 for configuration options.) Except for dial
