[cisco-voip] issue with 8851 handset

[Brian Meade]

This one is nasty.  Been hitting a bunch of people.

On Tue, Feb 27, 2018 at 2:51 PM, Anthony Holloway <
avholloway+cisco-voip at gmail.com> wrote:

> Have you seen the defect on the Opus codec and 8800 series phones?
>
> OPUS codec on 78XX/88XX causing audio quality problems
> <https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvc76073>
>
> On Tue, Feb 27, 2018 at 9:48 AM Terry Oakley <Terry.Oakley at rdc.ab.ca>
> wrote:
>
>> This appears to be a SIP issue but I will ask you much more brilliant
>> people than I to see where I should or should not be looking.   We are
>> slowly migrating from a mostly 7941 7942 SCCP deployment to almost
>> exclusively 8851 SIP based handsets.   We rarely saw any call issues but
>> now with the 8851 handsets in place we have a few users who are
>> experiencing dropped calls (so far only internal calls have been reported
>> as dropped).    The other person in the call path is almost always getting
>> the Perservation mode message on their device.   This is so far been
>> reported as affecting a few users primarily and consistently.   Even to the
>> point where one of them the phone is restarting on a regular basis even
>> when not on a call.   We have replaced devices, moved users to new network
>> ports and still the issue continues.   Any advice that you have that would
>> assist me in troubleshooting this I would greatly appreciate.   I have used
>> RTMT to ‘look’ at different parameters but am a little green on where or
>> what I should be looking for.
>>
>>
>>
>> Graciously thanking you in advance
>>
>>
>>
>> Terry
>>
>>
>>
>> *Terry Oakley*
>>
>> Telecommunications Coordinator *| *Information Technology Services
>>
>> *Red Deer College **|*100 College Blvd. *|* Box 5005 *| *Red Deer *|* Alberta
>> *| *T4N 5H5
>>
>> work (403) 342-*3521   **| * FAX (403) 343-4034
>>
>>
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>>
>
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