[cisco-voip] SIP gateway with IM client

[DeRooy, Aaron H]

I have an IM client that can't make a call thru a 3640 gateway
configured for SIP. Here's the dial peers on the gateway. The g/w has a
T1 pointing to the PSTN and a ethernet on the same campus as the SIP
server that is acting as a SIP proxy. My understanding is the SIP/IM
client (using a softphone-like app) places a call like 9,223-4455 and
the SIP server sets up the call with the g/w and then the g/w contacts
the SIP/IM client to talk RTP. The call setup seems to make it to the
g/w but the user gets "can not complete the call" or the like. Is there
something missing on my dial peer statements? What make the g/w a SIP
g/w other than the session protocol line?

dial-peer voice 202 voip
 incoming called-number .
 session protocol sipv2
 session target ipv4:10.130.0.22
 codec g711ulaw
!
dial-peer voice 100 pots
 destination-pattern 9.......
 port 2/1:0
 prefix 9,

Aaron H. DeRooy