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100rel Header Is Not Forwarded By OCCAS (Doc ID 2810374.1)

Last updated on SEPTEMBER 28, 2021

Applies to:

Oracle Communications Converged Application Server - Version and later
Information in this document applies to any platform.


A question regarding behavior of OCCAS sip container regarding 100rel headers in 180 ringing responses.

An application written in B2BUA mode running on top of the OCCAS server. Logic regarding provisional responses: when receive them on side A to forward them to side B.

The issue is: Side A makes call to side B and side B response with 180 ringing message in which there are 100rel header. Application is forwarding this 180 message to side A but without 100rel header. It look like OCCAS sip container is striping this header.

After changing the code to make check is provisional response is "isReliableProvisional" to resend this response with "sendReliably" method. And now 100rel header is not striped and it is resend to side A and everything is OK.

Is this behavior to strip 100rel header normal for the OCCAS sip container? And is it always needed to use isReliableProvisional and sendReliably methods? Is this the correct way to handle this scenarios?


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