Aastra Telecom 9480i CT Series User Manual

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41-001160-03, Rev 00, Releaes 2.4 

IP Phone Administrator Guide

You can configure the following RTP settings.

RTP Port Base

RTP Port

sip rtp port

The RTP port is used for sending 
DTMF tones and for the audio 
stream. Your network administrator 
may close some ports for security 
reasons. You may want to use this 
parameter to send RTP data using a 
different port. Default is 3000.

For more information, see Chapter 
4, 

.

N/A

Basic Codecs
(G.711 u-Law, 
G.711 a-Law, G.729)

sip use basic codecs

Enables or disables basic codecs. 
Enabling this parameter allows the 
IP phone to use the basic Codecs 
when sending/receiving RTP 
packets. Valid values are 0 
(disabled) and 1 (enabled). Default 
is 0 (disabled).

For more information, see Chapter 
4, 

.

N/A

Force RFC2833 Out 
of Band DTMF

sip out-of-band dtmf

Enables or disables out-of-band 
DTMF. Enabling this parameter 
forces the IP phone to use 
out-of-band DTMF according to 
RFC2833. Valid values are 0 
(disabled) and 1 (enabled). Default 
is 1 (enabled).

For more information, see Chapter 
4, 

.