[SR-Users] Strange PUA Behaviour

Phil Lavin phil.lavin at synety.com
Mon Jan 18 19:15:07 CET 2016

Hi all,

We are investigating an issue with BLF whereby the BLF key on the subscribed phone does not always "turn off" after the call has ended. We have enabled force_single_dialog to keep things simple for debugging. The attached pcap is the result. The relevant stuff as I see it is:

*         Packet #60 - UA sends a BYE

*         Packet #62 - PUA sends a PUBLISH over loopback with a state of "terminated"

*         Packet #65 - The PUBLISH is sent out to the subscribed UA as a NOTIFY with a state of "early"

This causes the BLF light on the phone to continue flashing.

We are running a version of Kamailio compiled from the HEAD of the current 4.3 branch.

Any ideas?

Phil Lavin
Telecoms Systems Manager
CloudCall by SYNETY

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