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Cisco Bug: CSCtc17319 - Unexpected new call and onhold event in a rare conference scenario

Last Modified

Nov 03, 2012

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases


Description (partial)


There are rare occasions when
some unexpected event messages are notified and
phones become unexpected status.

[Scenario Example]
CTIPort - DN:1000
IPPhone-A - DN:2000
IPPhone-B - DN:3000

1. 2000 makes a call to 1000
2. 1000 answers the call(CALL-A)
3. Setup a conference on 1000(CTIPort)
4. 1000 makes a consultation call to 3000
5. 3000 answers the consult call
6. Complete the conference on 1000 and neary simultaneously the original call(CALL-A) is dropped
by remote phone(IPPhone-A).

After the above scenario:
An extra New CALL is notified.
And the consult call get ONHOLD(the call should be CONNECTED).

Expected status after the above scenario is simple two-party call between 1000 and 3000.


This is race condition in a specific conference scenario.
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Bug Details Include

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