SPA400 Field Reference

Setup

C

IP Tos/DiffServ

Call Signaling Packets

TOS field in IP header for outgoing SIP packets

 

Default: 68

 

 

RTP Packets

TOS field in IP header for outgoing RTP/RTCP packets

 

Default: b8

 

 

Session

 

 

 

Enable Session Timer

Enables the SPA400 to encode the Timer header in all

 

INVITE requests for ringing timeout (checked by default)

 

 

Desired Refresh Time

Desired session timer in seconds (0 by default)

 

 

Minimum Refresh Time

Minimum value of the session timer in seconds (0 by default)

 

 

Setup tab>

Voice

NOTE The default settings should be sufficient in most use cases. These settings should be adjusted only after consultation with a service technician for the telephone company. It is essential that these settings are compatible with those of the Central Office.

Voice Codecs

Preferred Codecs

Preferred Codec

The preferred voice codec that SPA400 uses to negotiate with remote VoIP devices to determine the voice codec for a call: G.711U, G.711A, or G.729

Voice Codecs

Packetization

The packetization time in milliseconds for each codec:

 

G.711U, G.711A, G.729

 

 

VAD

Voice Activity Detection (OFF or ON)

 

Default: OFF

 

 

SPA9000 Voice System Administration Guide

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Cisco Systems SPA9000 manual Voice Codecs