[SIPForum-discussion] Re-Invite without SDP, No Audio Issue

[Ellen Lee]

Hi Harshal,

 

Re-Invite is to put caller on/off hold during call transfer. Not hearing the CSAT survey indicates SIP/RTP setup issues between Avaya and IVR.  

 

Ellen

 

From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of Harshal Patel
Sent: Tuesday, September 26, 2017 5:40 PM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] Re-Invite without SDP, No Audio Issue

 

Hello Members,

 

We have a quick question for our propriety SIP IVR deployment with Avaya 6.3.

 

Avaya sends "SIP IVR" a Re-Invite after Agent(Avaya) tries to connect to "SIP IVR" for CSAT application. Meaning Agent is now connecting "original caller" to IVR CSAT application.

This Re-Invite does not have SDP.

 

1.	Should the SIP IVR put the audio on hold ? because no SDP is present.
2.	Or Should the SIP IVR neglect the Re-INVITE and continue with the call?

 

The issue is caller is not able to hear the CSAT survey.

 

We checked the RFC & it states:

      a UAC MAY send a re-INVITE with no session description, in which case the first

   reliable non-failure response to the re-INVITE will contain the offer
   (in this specification, that is a 2xx response).
 
But we do not see anything in regards to audio.
 
Appreciate if you can provide any link - that describes the path to approach in the above case.
 
Thank you
Harshal
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