3Com VCX v7111 User Manual page 51

Quick Setup Screen
Figure 20
To configure basic SIP parameters:
If the V7111 gateway is connected to a router with Network Address Translation (NAT)
1
enabled, perform the following procedure. If it is not, leave the NAT IP Address field
undefined.
Determine the public IP address assigned to the router (by using, for instance, router
Web management). If the public IP address is static, enter this in the NAT IP Address
field.
Enable the DMZ (Demilitarized Zone) configuration on the residential router for the
LAN port where the V7111 gateway is connected. This enables unknown packets to
be routed to the DMZ port.
Under SIP Parameters, enter the V7111 domain name in the Gateway Name field. If the
2
field is not specified, the V7111 gateway IP address is used instead (default).
When working with a Proxy server, set the Working with Proxy field to Yes and enter the
3
IP address of the primary Proxy server in the Proxy IP Address field. When no Proxy is
used, the internal routing table is used to route the calls.
Enter the Proxy Name in the Proxy Name field. If Proxy name is used, it replaces the
4
Proxy IP address in all SIP messages. This means that messages are still sent to the
physical Proxy IP address but the SIP URI contains the Proxy name instead.
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3Com VCX V7111 VoIP Gateway User Guide
51