Cisco VCO/4K ISDN Supplement Manual

About this manual

This document serves as a supplement for the Cisco VCO/4K system, detailing the installation and configuration of the ISDN Primary Rate Interface (PRI) and Non-Facility Associated Signaling (NFAS) options. It covers hardware requirements, preinstallation procedures for both nonredundant and redundant systems, and specific instructions for setting up ISDN spans.

What's inside

• Introduction
• System Administration Support
• ISDN Processing Overview
• Call Examples
• Non-Facility Associated Signaling (NFAS)
• D-Channel Backup Processing
• Hardware Requirements
• ISDN Message Templates
• NFAS Configuration
• Interworking

Specifications

Frequently asked questions

What are the hardware requirements for the ISDN PRI installation?

The manual specifies that hardware requirements are detailed in Chapter 1 under the section Hardware Requirements.

How do I access the NFAS Group Summary Screen?

The manual describes accessing the NFAS Group Summary Screen as part of the NFAS System Administration procedures.

What is the purpose of the D-channel switchover timer T321?

The T321 timer is started when the primary D-channel fails or a manual switchover is initiated, lasting 40 seconds.