Cisco MC3810-APM-FXO= Datasheet download pdf (Page 31)

Configuring Voice Ports

Configuring Digital Voice Ports

VC-65

Cisco IOS Voice, Video, and Fax Configuration Guide

Configuring Controller Settings for Digital T1/E1 Voice Ports

The purpose of configuring controllers for digital T1/E1 voice ports is to match the configuration of the

router to the line characteristics of the telephony network connection being made so that voice and

signaling can be transferred between them and so that logical voice ports, or DS0 groups, may be

established.

Figure 16 shows how a ds0-group command gathers some of the DS0 time slots from a T1 line into a

group that becomes a single logical voice port, which can later be addressed as a single entity in voice

port configurations. Other DS0 groups for voice can be created from the remaining time slots shown in

the figure, or the time slots can be used for data or serial pass-through.

Note that all the controller commands in Figure 16 other than ds0-group apply to all the time slots in

the T1.

Step 4

Router(config-dspfarm)# codec {high | med}

Specifies the codec complexity based on the codec

standard being used. The keyword specified for

codec affects the choice of codecs available when

the codec dial-peer configuration command is

used. The keywords are as follows:

• high—Supports two voice channels encoded

in any of the following formats: G.711, G.726,

G.729, G.729 Annex B, G.723.1, G.723.1

Annex A, G.728, and fax relay.

• med—(default) Supports up to four calls

using the following codecs: G.711, G.726,

G.729 Annex A, G.729 Annex B with Annex

A, and fax relay.

Step 5

Router(config-dspfarm)# description

Enters a string to include descriptive text about

this DSP interface connection. This information is

displayed in the output for show commands and

does not affect the operation of the interface in any

way.

Command Purpose

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Cisco MC3810-APM-FXO= Datasheet Page 31