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Aastra Telecom 41-001343-02 User Manual

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Operational, Basic, and Advanced Parameters
 
A-99
41-001343-02 REV04 – 05.2014
RTP, Codec, DTMF Global Settings
Global Settings
Parameter – 
sip rtp port
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description
Indicates the port through which the RTP packets are sent. This value must specify the 
beginning of the RTP port range on the gateway or router. 
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.
Note:
The phones support decoding and playing out DTMF tones sent in SIP INFO requests. 
The following DTMF tones are supported:
• Support signals 0-9, #, *
• Support durations up to 5 seconds
Format
Integer
Default Value
3000
Range
Not Applicable
Example
sip rtp port: 3000
Parameter –
sip use basic codecs
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description
Enables or disables basic codecs (G.711 u-Law, G.711 a-Law, G.729). Enabling this 
parameter allows the IP phone to use the basic Codecs when sending/receiving RTP 
packets.
Format
Boolean
Default Value
0
Range
0 - Disable
1 - Enable
Example
sip use basic codecs: 1
Parameter – 
sip amr codec payload format
Configuration Files
aastra.cfg, <model>.cfg <mac>.cfg
Description
Specifies the payload format for the AMR/AMR-WB codec.
Format
Integer
Default Value
0
Range
0-2
0 (Enable bandwidth efficient mode per RFC, no octet-aligned header is in the INVITE 
SDP [default]).
1 (Enable octet-aligned mode and add octet-align:1 in SDP, 
negotiate mode for incoming calls).
2 (Disable octet-aligned mode and add octet-align:0 in SDP, 
negotiate mode for incoming calls).
Example
sip amr codec payload format: 1