Operational, Basic, and Advanced Parameters
41-001343-02 REV05 – 07.2014 A-25
Network Address Translation (NAT) Settings
Parameter –
sip nat ip
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description IP address of the network device that enforces NAT.
Format IP Address
Default Value 0.0.0.0
Range Not Applicable
Example sip nat ip: 192.245.2.1
Parameter –
sip nat port
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description Port number of the network device that enforces NAT.
Format Integer
Default Value 0
Range Not Applicable
Example sip nat port: 51620
Parameter –
sip nat 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 param-
eter 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 51720
Range Not Applicable
Example sip nat rtp port: 51730
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