ADTRAN 1200305L1 system manual Dial Backup for Dedicated T1 Circuits, Before You Begin

DIAL BACKUP FOR DEDICATED T1 CIRCUITS

Introduction

Dial backup is an ATLAS 550 capability which allows you to create alternate data connections in the unit to ensure data integrity in the event of a primary circuit failure. This note will explain what dial backup is and how to configure an ATLAS 550 to support it. There are three steps to configuring the ATLAS 550 for dial backup: Configuring the Dedicated T1 Data Link, Configuring the Dial Backup PRI, and Configuring the Dial Backup Endpoint.

The primary link to be backed up must be a data link to a V.35 port. Dedicated dial backup for T1 ports is not currently supported.

Before You Begin

This application requires an ATLAS 550 containing firmware B.01 or later, a V.35 Nx Module (P/N 1200311L1), and a BONDing Module (P/N 1200326L1) if bonding of B channels is required.

Description

The ATLAS 550 will either originate or answer a dial backup call upon detection of a network failure or data failure on the T1/E1. A network failure is any physical layer T1/E1 failure, such as red alarm or loss of signal (LOS). A data failure is detected when the ATLAS 550 no longer receives keep-alive responses over the 8K inband channel. The data criteria for dial backup can only be used when configured to monitor the inband channel.

61200305L1-1F © 2002 ADTRAN, Inc. 365