Aastra Telecom SIP 57I - Manual (Page 522)

Operational, Basic, and Advanced Parameters
A-20 41-001160-00, Release 2.1, Rev 04
IP Phone Administrator Guide
Appendix A
Network Address Translation (NAT) Settings
Parameter –
sip nat ip
NAT IP
(in Web UI)
IP phone UI Options->Administrator Menu->SIP Settings
Aastra Web UI Advanced Settings->Network
Configuration Files aastra.cfg, <mac>.cfg
Description IP address 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
NAT SIP Port
(in Web UI)
IP phone UI Options->Administrator Menu->SIP Settings
Aastra Web UI Advanced Settings->Network
Configuration Files aastra.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