O'Reilly logo

CCVP TUC Quick Reference Sheets by David McDaniel

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 3. Call Setup Issues

Call Setup Issues Introduction

Many types of problems can occur during call setup. The following are some examples of this class of problem:

• Fast-busy tone during or at the end of dialing

• Caller ID missing or incorrect

• No ringback

• Dead air

• One-way audio

• Inefficient call routing

• Secondary dial tone not functioning

The first step toward narrowing down potential problems is to decide whether the call is happening at a single site, is destined off-site or over an intercluster trunk, or whether it is being routed through an H.323 gatekeeper. The following paragraphs discuss each of these topologies in depth and present some of the associated issues and resolutions that can occur.

On-Premise Single-Site Calling ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required