Paradyne 3600, 3611 Bilateral Loopback

COMSPHERE 3600 Series Data Service Units

5-24 March 1999 3610-A2-GB41-60

Bilateral Loopback

Bilateral Loopback, shown in Figure 5-9, is a

combination of DTE and Digital Loopbacks operating

simultaneously in the same DSU. Bilateral Loopback or

Digital Loopback is a customer-selectable configuration

choice (see the General Configuration Option Table in

Chapter 6 of the COMSPHERE 3600 Series Data Service

Units, Models 3610 and 3611, Operator’s Guide).

NOTE

If the Bilat Lpbk (Bilateral

Loopback) configuration option

is enabled, requesting a Remote

Digital Loopback or Digital Test

on a port also initiates a DTE

Loopback on the port.

Requesting an aggregate

Remote Digital Loopback or

Digital Loopback automatically

initiates a DTE Loopback on all

ports.

Figure 5-9. Bilateral Loopback

Contents

Main COMSPHERE 3600 Series Data Service Units Warranty, Sales, Service, and Training Information Document Feedback Trademarks !Important Safety Instructions Notices Table of Contents Preface 1. Overview 2. Model 3610 Installation 3. Model 3611 Installation 4. Principles of Operation Index 5. DSU Operations Appendices List of Figures Page Page List of Tables Preface About this Guide How to Use this Guide Related Documents Reference Documents Overview Standard Features 3611, Operators Guide 3611, Dial Backup Module and SNA Diagnostic Interface Options, Applications Guide. Optional Features DSU with TDM Capability Page DSU with MCMP Capability DSU with Digital Bridge Capability DSU with LPDA-2 Interoperability and TDM or MCMP Models Except Model 3610 with TDM or MCMP Model 3611 with TDM or MCMP Models 3610 and 3611 with SNA Diagnostic Interface Figure 1-1. Model 3610 DSU with TDM or MCMP Page DBM Types DBM-V DBM-S DBM-D Government Requirements Page Model 3610 Installation Hardware Straps Page Changing Hardware Settings Page Changing the Flex Interface Switch Changing the DSD Option Card Electrical Connection Power-Up Routine WITH TDM or MCMP OPTION Figure 2-7. Model 3610 DSU with TDM or MCMP WITH TDM or MCMP OPTION WITHOUT TDM or MCMP OPTION 3611, Time Division Multiplexer, Multichannel Multipoint, and Digital Bridge Options, Users Guide COMSPHERE 3600 Series Data Service Units, Models 3610 and 3611, Operators Guide Network Diagnostic Connection Software Configuration From the DCP and Async Terminal From the NMS Network and LADS Connections DSU DTE Connection Verification Testing Adding a TDM/Flex or MCMP/Flex to an Installed Model 3610 DSU Getting Started Removing the DSU from Its Base Installing a TDM/Flex or MCMP/Flex Reassembling the Unit Model 3611 Installation Non-Modular DSU with a TDM or MCMP Modular DSU with a TDM or MCMP DBM-Vs/DBM-Ss/DBM-Ds Hardware Straps Software Configuration From the SDCP From the NMS Verification Testing Adding a TDM or MCMP to an Installed Model 3611 DSU Installing a Non-Modular TDM or MCMP Power-Up Routine 3611, Users Guide Page Installing a Modular TDM or MCMP Page Page Removing TDM or MCMP from an Installed Model 3611 DSU Page Principles of Operation Network Terminology Point-to-Point Transmission Multipoint Transmission Modes Of Operation Basic Mode TDM Mode MCMP Mode Bridge Mode Time Division Multiplexing Speed Characteristics Asynchronous and Synchronous Sources In-Band Framing and Underspeed Channel TDM Architecture core TDM Applications Single-Port Async/Sync Support Page Point-to-Point Multiplexing TDM Backbone Circuit with Extensions Diagnostic Path Extension Digital Sharing Page Multiplexing and Digital Sharing FEP Port Sharing Set the tributary DSUs port Set the control DSUs port cannot Page TDM Backup Page Page Page Page Multichannel Multipoint Page Line and Channel Speeds MCMP Overhead Composition Management Channel In-Band Secondary Channel Transport Number of Tributaries MCMP Architecture MCMP Operation Initialization Network Modification Switched-Carrier Emulation MCMP Applications MCMP MCMP with Digital Sharing MUX Configuration Options MCMP with FEP Port Sharing MCMP Backup Page Page Page Page Page Page Digital Bridge Page Page Diagnostic Considerations Multipoint Backup Page Multipoint Backup Addressing Page Multipoint Backup Architecture Page Page Central-Site DBM-Vs/DBM-Ss/DBM-Ds DBM-V/DBM-S/DBM-D Dial on DTR Capability Digital Bridge/DBM-V/DBM-S/DBM-D Interface Digital Bridge/DBM-V/DBM-S/DBM-D Switched LSD Operation Tributary DSU Considerations Setup DSU Rate Equals DBM Rate Automatic DDS Restoration Setup DBM Rate Less Than DSU Rate* Manual DDS Restoration LADS Operation Point-to-Point LADS Bridged LADS Page Bridged LADS Architecture Digital Bridge/DSU Interface NMS Control SNA Diagnostic Interface LPDA-2 Addressing Assigning an Address to the Control DSU Assigning an Address to the Tributary DSU NetView-Initiated Dial Backup Multipoint Dial Backup Multiplexing with TDM or MCMP Page Digital Sharing Page Page Page Page DSU Operations Diagnostic Control Panels Status Indicators TDM Multirate DSU 3611 COMSPHERE 3600 Series Data Service Units 5-4 March 1999 3610-A2-GB41-60 MCMP Port Multirate DSU 3611 Figure 5-2. Model 3611 DSU and MCMP Faceplates DBM-S Bridge mode (circuit designations) or (the SDCP addresses one device at a time) (the TDM or MCMP circuit card has same address as its associated DSU) Menu Structure Menus and Mode of Operation Local/Remote Menu Subbranches does not Status Branch Health and Status Device Health and Status Expanded Health and Status Subnetwork Health and Status DTE Status If there is only one port If there is more than one port If using FEP port sharing Circuit Quality Terminal Power Backup Branch DBM/DBM-V/DBM-S/DBM-D Aggregate Switch Bridge Test Branch Abort Device Test Page Loopback must Local Loopback Page DTE Loopback Digital Loopback Page Remote Digital Loopback Page Bilateral Loopback Digital Test Page End-to-End Test Local Bit Error Rate Test Page Lamp Test Configuration Branch Options MUX Configuration Options MUX Setup Option Set Always select the mode (MUX Funct) first Page Page Page Port Option Sets MCMP Operation Poll List Port Speed Configuration Options Poll List Adding Self to Poll List Acquiring the Poll List Directory Save Phone Save Async Terminal Control Branch Transmitter Control will not LEDs External Leads Page Page Page Page B Configuration Worksheets Instructions Page Configuration Worksheet for TDM Mode (1 of 3) (Chang) (Chang) (Chang) (TDM) Configuration Worksheet for TDM Mode (2 of 3) Configuration Worksheet for TDM Mode (3 of 3) Page Configuration Worksheet for MCMP Mode (1 of 3) MUX Setup Value MUX Funct: (MCMP) or greater Prt3 Options Value Prt1 Options Value Configuration Worksheet for MCMP Mode (2 of 3) ) , ) Configuration Worksheet for MCMP Mode (3 of 3) Page Configuration Worksheet for Bridge Mode (1 of 2) (CBrdg or EBrdg) (Chang) *MCMP option only Configuration Worksheet for Bridge Mode (2 of 2) ** TDM option only Configuration Worksheet for Basic Mode Configuration Worksheet for Basic (DBM-V, DBM-S, or DBM-D) or (Chang) Note: Values shown in [Bold] are factory-set defaults. Pin Assignments Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page D Configuration Scenarios all only affected TDM Configuration Scenarios TDM Scenario 1 Using Two Synchronous Channels Page TDM Scenario 2 Using Switched 56 kbps Dial Backup Page Digital Bridge Configuration Scenarios Automatic Partial Backup Not Page Full Backup To place a call from the DBM-V to its tributary Page Multipoint Full Dial Backup with Nondisruptive Diagnostics Page Page Page Automatic Partial Backup Using an Extended Bridge Page Page Page Page Network Management-Controlled Full Backup Using an Extended Bridge Page Page Page Page Page MCMP Configuration Scenarios MCMP Using FEP Port Sharing Page Dedicated MCMP Backup with Switched 56 DBMs Page Page MCMP Backup Using FEP Port Sharing Not Page Page Page Page Index A B C D Page E F G H I K L M N O P R S T U V W