Twilio SIP Trunking with CUBE

[JOHN PARDUHN]

I am working on my lab setup with CUCM 11.5, a 2811 router running IOS 12.4, and a Twilio SIP trunk. I can route a call to the trunk from an IP phone without an issue, but the call won't set up. I get the following dump from the Twilio debugger (redacted):

ParametersShow Raw

From	<sip:6305551212@domain_sip.pstn.twilio.com;user=phone>;tag=11296D5C-10CC
To	<sip:+14154758378@domain_sip.pstn.twilio.com;user=phone>
SipSrcIp	1.2.3.4
SipSrcTransport	udp
SipCallId	6CBE739-EA5A11E6-99CBC1B4-E343E364@192.168.0.2
UserAgent	Cisco-SIPGateway/IOS-12.x

Message TextShow Raw

Msg	The body of the request was empty, which is not allowed in this context.
ErrorCode	32103
LogLevel	WARN

I'm curious if anyone has worked on this setup and what your experience was. I'd really like to have this proof-of-concept working for my own knowledge. Thanks in advance!

[keglass]

parduhnj,

I recommend you also post this to the Cisco Support Community for additional feedback from Cisco technical experts and other users.

https://supportforums.cisco.com/

Thank you for participating in the community.

Kelli Glass

Moderator for Cisco Customer Communities

[JOHN PARDUHN]

Thanks, Kelli. I will follow your recommendation.

[Theofilos Tzachristas · Accepted solution]

Hello all,

I had the same problem.This is because Twilio doesn't accept SIP delayed offer. In the INVITE message SDP should be included which can be done when you force Early Offer

Twilio-CUBE(config)#voice service voip

Twilio-CUBE(conf-voi-serv)#sip

Twilio-CUBE(conf-serv-sip)#early-offer forced

Theo