We've not heard it called 'growling,' but we do hear it. Our customers have said the phone makes a 'farting' noise and they are unable to pick it up.
We've narrowed it down to a firmware release, we think. We very much experienced the issue with the 6.8.5.1 H.323 release, when the phones did not directly upgrade from the 6.8.5.0 or 6.8.4 releases. If they did, things seemed to be OK, but we found phones that went directly to 6.8.5.1 from an earlier than 6.8.4, they experienced this issue.
Our fix so far as been to downgrade to 6.8.5.0 then upgrade immediately after to 6.8.5.2. We just started this process for the phones that have reported it, and have seen favorable results. Don't know if it is the 100% fix though, since we've only been deploying it for less than a week so far.
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Nick Kwiatkowski
Director of Design and Engineering
Michigan State University
East Lansing MI
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Original Message:
Sent: 06-22-2022 08:50 AM
From: Sam Osheroff
Subject: SIP phones "growling" or muffled ring tone
This sounds like a network issue.. Could be a slow loop, such as through a phone, or a sleeping computer flooding IPv6 multicast listener flooding (happens when computers with certain Intel NICs go to sleep). I would bet the latter, as we've seen first hand how the IPv6 multicast flood impacts the H323 firmware on the 96x1 phones (makes them very sluggish). You should be able to see a multicast flood in Wireshark. It'll appear as a massive amount of IPv6 multicast traffic. Your phones don't need to have IPv6 enabled to be impacted, either.
As a side note... Your CM is ahead of your ASM, and I assume ahead of your SMGR. They should all be at the same patch level, starting with SMGR. At least that used to be Avaya's stance. The order of upgrade was always: SMGR, ASM, BSM, LSP, ESS, CM.
-Sam
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Sam Osheroff
UC Engineer
University of Washington
Seattle WA
Original Message:
Sent: 06-21-2022 11:06 AM
From: Richard Browne
Subject: SIP phones "growling" or muffled ring tone
Hello,
We are experiencing an odd behavior that I am trying to troubleshoot. On one floor at one of our office buildings, all the suites get a "growling" or muffled ring tone, and a delayed Caller ID. Sometimes the calls will not complete.
When we trace on the network and with the carrier, we cannot any obvious errors. Since we are using TLS, I cannot see the details on the SIP transactions.
Has anyone seen this occur and how were you able to fix it?
Kind Regards, Richard
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Richard Browne
Sr. Telecommunications Engineer
Adventist HealthCare
820 West Diamond Avenue, Suite 600
Gaithersburg, MD 20878
Office #: 1-240-826-6465 / 1-240-637-4045
Email: RBrowne@AdventistHealthCare.com
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