Olle E Johansson wrote:

26 jan 2007 kl. 16.31 skrev James Fromm:

Olle E Johansson wrote:
24 jan 2007 kl. 18.10 skrev Eric "ManxPower" Wieling:
James Fromm wrote:

The behavior we see is that the SIP interface in the queue will sometimes not release from the in-use state. Connecting to the interface from another SIP device and immediately hanging up will clear the state. The phones in question are configured with one line that will except only one call. The device itself does not think it is in-use because it will accept another call. Something in the SIP channel driver is not clearing the state when a call is completed. There is definitely no correlation between this and Asterisk restarting. In fact, if a device is 'stuck' on in-use, restarting Asterisk will clear the state. I've been working on this for a week now. It only started for us because I just implemented the call-limit option in the sip.conf in Asterisk for the devices. See my posts with subject 'Queue and Interface time out'.

I believe there is/was a bug relating to call-limit. Buddy Watch doesn't work if you use call-limit and if a call from a queue is transfered, the call-limit is not released until the original call is terminated. I do not know if these issues have been fixed or not.
Again, a relation to call transfer. I think the bug is that we don't handle call-limits properly during a call transfer. That needs
to be verified and fixed.

There may be, but transfers are not the cause of the issue I describe. SIP interfaces that are members of a Queue, will erratically not be released from 'in-use' when a call is completed. I have tested with both caller terminated and agent terminated calls and both will cause this behavior. It happens on approximately 20% of all calls the queue members receive. Dialing the SIP device with another device will immediately free the status.

I wonder if this only happens on calls sent to the SIP device by the Queue application. I will test that today.

If you are using chan_agent as a proxy channel, check if that changes things.


We don't have agents defined so I don't think chan_agent applies. The Queue's members are assigned through the management port from an application running on the the agent's PC. I think the Queue application loses sync to the SIP channel driver's information containing the state of the SIP interfaces.

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