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 ...

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