Aastra Telecom SIP 480I - Manual (Page 428)

Sample Configuration Files
D-16 41-001129-00 Rev 09, Release 1.4.1
IP Phone Administrator Guide
Appendix D
#sip nortel nat timer: 60 # seconds between keep alive messages
# Option 2:
#
# If you are using a session border controller, you should set the
# outbound proxy to the session border controller address
#sip outbound proxy: sbc.aastra.com
#sip outbound proxy port: 0 # a value of 0 enables SRV
# lookups for the address of
# the proxy.
# Option 3:
#
# If you know the public IP address of your NAT device and and have
# opened up a port for the SIP messages then you can statically
# assign this information.
#sip nat ip: 67.123.122.90
#sip nat port: 5890
# Additional Network Settings
#============================
#sip rtp port: 3000 # Eg. RTP packets are sent to port 3000.
#------------------------------------------------------------------
# Configuration Server Settings
# =============================