Preview Tool

Cisco Bug: CSCvt93560 - Jabber delays sending UpdateCapabilities CAST message on originating side causing video flapping

Last Modified

Aug 28, 2020

Products (1)

  • Cisco Jabber for Windows

Known Affected Releases

12.6(2) 12.7(0) 12.7(1) 12.8(0) 12.8(1) 12.8(2)

Description (partial)

When Jabber for Windows is used in Desk Phone Control mode it does not identify that it's controlling phone A originating the call and delays sending CAST UpdateCapabilities message.
As a result both Jabber clients (on Phone A side - originating the call and Phone B side - terminating the call) are delaying UpdateCapabilities message for 1000ms
This leads to the video stream flapping at 3-5th second at the beginning of a video call between due to additional re-Invite in combination with threaded architecture of the phone FW and race condition b/w threads.

- Jabber for windows is used in Desk Phone Control mode
- Jabber is controlling CP-88XX IP phones
- Call is made from IP Phone (not from Jabber client)
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.