Specifications

5-35

Catalyst 4224 Access Gateway Switch Software Configuration Guide

OL-2031-02

Chapter 5 Configuring the Voice Interfaces

E&M Trunk Line Configuration (H.323)

The section illustrates how to configure VoIP to link PBX users with E&M trunk

lines.

This section contains the following topics:

• Scenario, page 5-35

• Handling Incoming Caller ID Digits on an E&M Port, page 5-36

• Gateway San Jose Configuration, page 5-37

• Gateway Salt Lake City Configuration, page 5-37

Scenario

Suppose that a company wants to connect two offices: one in San Jose, California,

and the other in Salt Lake City, Utah. Each office has an internal telephone

network using a PBX connected to the voice network with an E&M interface.

Both the Salt Lake City and the San Jose offices are using E&M Port Type II, with

four-wire operation and ImmediateStart signaling. Each E&M interface connects

to the gateway using two voice interface connections. Users in San Jose dial 8-569

and then the extension number to reach a destination in Salt Lake City. Users in

Salt Lake City dial 4-527 and then the extension number to reach a destination in

San Jose.

Figure 5-2 illustrates the topology of this configuration.