IP Server 900 Programming Manual Function 8: IP programming
L.13
Function 84: SIP trunk programming
Note: For each IP address in the following steps, enter the address in a dotted-decimal format consisting of four
numbers separated by dots. Valid numbers are 0 through 255. Use # to enter the dots between numbers.
1. Use the scroll keys to select the IP/ASC Carrier Card. Press # to continue.
IP/ASC CARRIER
1 >
Note: The only valid option is Carrier Card 1.
2. Use the scroll keys to select the type of SIP card that will be used. Press # to continue.
SIP CARD TYPE
SIGNALING
3. Use the scroll keys to enable or disable NAT traversal. Press # to continue.
CC 1 SIP NAT
DISABLED
Notes: When the IP Server 900 is behind a firewall, select ENABLED for the NAT traversal option (step 3). Program
the SIP public IP address (step 4) using the public IP address of the WAN side of the firewall.
When the IP Server 900 is not behind a firewall, select DISABLED for the NAT traversal option (step 3).
With the SIP NAT option (step 3) disabled, the SIP public IP address (step 4) is not needed and this
step will not appear.
While the public IP addressing for SIP trunk programming may differ from the IP/ASC Carrier Card or NSP
public IP addresses, it is important to remember that the IP/ASC Carrier Card gateway will always be used
for SIP trunking. This means that all outgoing traffic will be sent through that gateway. For SIP carriers who
provice their own, dedicated Internet connectivity, it is important to be aware of this functionality in the IP
Server 900 to ensure that connectivity is stable.
(Continued)
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