<div><br></div>I am building a Cisco IOS sip gateway with Nortel CS1000M , I have T1 cas circuits terminated on the IOS gateway and need help with SIP configuration for communication with Nortel. I have tried a configuration but I cant make a call using csim start on the router to a Nortel IP extension, it errors out saying sipSPIOutgoingCallSDP: Could not create source SDP for Outgoing Call in debug ccsip all. I have looked at Cisco IOS voice gateway compatibility portal and also through the IOS sip configuration guide. <div>
<br></div><div>Any help would be greatly appreciated.</div><div><br></div><div>Regards,</div><div><br></div><div>Aman</div>