Isdn As Backup Interface; Configuring Isdn As A 64Kbps Backup Interface - Avaya 1000 Series Configuration Manual

Backup Interface-ISDN

ISDN as backup Interface

ISDN interface can be used as Backup interface, for another primary interface. This ISDN
backup interface will be tracking the primary interface. When the primary interface goes down,
then this backup interface will dial and make a call establishment. Data, which is supposed to
go through the primary interface, will be diverted and starts to flow through the ISDN backup
interface. When the primary interface is back up and running, then the ISDN call gets
disconnected and data starts to flow through the primary interface.
Primary interface might go down due to any of the following reasons:
• Physical links go down
• Negotiation failure occurs
• Link-drop feature (e.g., Link errors might exceed the configured thresholds)

Configuring ISDN as a 64Kbps Backup Interface

The network topology map show below is used for this configuration.
I
To configure the ISDN interface as the primary 128Kbps interface:
276 Avaya Secure Router 1000 Series Configuration Guide
Note:
The ISDN call will get disconnected if there is no traffic passing through the ISDN
interface for idle timeout period.
December 2010