Using an ADTRAN Terminal Adapter with Cisco
Routers
Document ID: 28080
Contents
Introduction
Prerequisites
Requirements
Components Used
Conventions
Dialing Method
V.25 or V.25bis Dialing
DTR Dialing
Keypad Dialing
Cabling
Configuration Example using V.25bis
ADTRAN ISU Configuration
Router Configuration and Testing
Verify
Troubleshoot
Troubleshooting Commands
Debug Output
Troubleshooting Procedure
Related Information
Introduction
ADTRAN ISDN terminal adapters (TAs) can be used to provide basic rate interface (BRI) connectivity to
routers without BRI interfaces. The TA (connected to the serial port) terminates the BRI call and transmits the
data to the router as a synchronous data stream.
This document outlines how to ADTRAN ISU" TAs to work with Cisco routers. We recommend that you
refer to the product documentation on the ADTRAN
web site prior to proceeding.
Prerequisites
Requirements
Verify that the BRI circuit is working correctly. You may wish to use the circuit on a router with a BRI port to
test the circuit prior to deploying it in this configuration. Also verify and test the peer device to ensure that it
functions properly.
For some applications, the ADTRAN ISU must support synchronous Multilink PPP (MPPP). The ISUs that
support synchronous MP include the ISU Express (Part Numbers 1200.081L5, 1200.081L6, and 1202.081
L6), ISU 2x64 (1200.051L1 and 1200.051L2), and the second generation ISU 128 (1202.029L2 and
1202.029L3.)
To use MPPP on a Cisco router, the software revision of the ISU must be up to date. A list of minimum
software revisions is presented by product in the table below:
