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Cisco Bug: CSCvs92936 - Jabber takes around 2 seconds to respond to a SIP INVITE during an escalation to ad-hoc conf

Last Modified

Mar 09, 2020

Products (1)

  • Cisco Jabber for Windows

Known Affected Releases


Description (partial)

When adding a Jabber client to a ad-hoc call, it takes a around 2 seconds for Jabber to reply to one of the SIP INVITE 
flow is following:
- Endpoint 1 calls Endpoint 2
- call is established between Endpoint 1 and Endpoint 2
- Jabber calls Endpoint 1
- The "Add" button is used on Endpoint 1 to answer the call from Jabber and escalate it to ad-hoc call directly
- in the SIP messages, we can see that Endpoint 1 replies to the INVITE from Jabber with 200 OK. Then ACK is sent by Jabber.
- Endpoint 1 then puts the call with Jabber on hold in order to merge. To do so, Endpoint 1 sends another SIP INVITE with the a attributes for each media set to inactive in the SDP.
- Jabber takes 2 seconds before replying to that INVITE.

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Bug Details Include

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  • Status
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