[cisco-voip] 69XX Unrecoverable Phantom Hold Issue

[Gabriel Jackson]

Both groups experiencing this issue have a line that is shared on roughly
10 phones. In both cases the "Maximum Number of Calls" and "Busy Trigger"
is set to allow for a large number of calls to be taken and managed from a
single device.

In my research I did not run across any warnings on this type of setup,
although I realize that Hunt Groups or similar are, more often than not,
used as an alternative.


On Tue, Jun 3, 2014 at 11:11 AM, Brian Meade <bmeade90 at vt.edu> wrote:

> I've seen this on the 7861s.  How many phones have the shared line?
>
> I would get console logs from all phones with the shared line and
> CallManager traces for the time period you see the next phantom call.  That
> way the call can be tracked in CallManager to where it came from and why it
> didn't clear.
>
> Brian
>
>
> On Tue, Jun 3, 2014 at 10:44 AM, Gabriel Jackson <gdjackso at oakland.edu>
> wrote:
>
>> We are currently experiencing an issue on some Cisco 6945 phones which
>> results in devices showing a shared line as on-hold, yet no call is
>> actually present. We can't reproduce this issue on demand, but we have
>> noticed the following is true when it occurs:
>>
>> 1. The shared line often has high call volume and is shared by as many as
>> 10 devices.
>> 2. The phantom hold will often only affect a single device, resulting in
>> the phone being out of sync with its peers.
>> 3. No amount of line-button/soft-button/hard-button presses seems to
>> clear the line of the phantom. Rebooting the phone will remove the phantom,
>> though.
>> 4. Calls can be made from the afflicted line
>> 5. To date, this has occurred on SIP6945.9-4-1-3 and SCCP6945.9-3-3-2-SR1
>> firmwares.
>>
>> We have found similar bug reports on the Cisco website, but they either
>> apply to other phone series and/or were corrected by the 9.3.X code train.
>>
>> Has anyone else run into anything similar? Thanks!
>>
>> --
>> Gabriel Jackson
>> Network and Telecom Systems Engineer
>> University Technology Services
>> (248) 370-4560
>>
>> _______________________________________________
>> cisco-voip mailing list
>> cisco-voip at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>
>>
>


-- 
Gabriel Jackson
Network and Telecom Systems Engineer
University Technology Services
(248) 370-4560
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