Several 8831s at a site report one way audio periodically. The users dial into an external, third party conferencing service. Once in a while, everyone else can't hear the users on the 8831. They have to hang up and dial in again. The firmware is sip8831.10-3-1SR4-2-NA, CUCM version 10.5.1. The problem will, of course, disapear for a week or so and come back. There are 10 total 8831s at the site, but only 4 complain. There are around 100 8831 phones in the whole company and only one phone in one other site has complained of the exact thing. Always the other callers cannot hear the users on the 8831. They say, when they call the conference service from their desk phones 8841s, there is no problem.
i have read through this post and would like to confirm if the latest progression on this release is that a factory reset is required after firmware is successfully loaded?
I noticed the issue resolved itself on the 8831<>8831 phones, but then found the issue reappeared again on calls between 8831<>and other model types(protocol independent). Has anyone else found this same issue?
Not sure if you have you contacted the TAC yet but I would suggest opening a ticket.
We downgraded to sip8831.10-3-1SR3-5-NA as the issue appeared to reoccur with the ES load mentioned and are rebooting the devices regularly (hard reset) as this seems to keep the issue at bay. Otherwise it appears to happen again a week or so after a reboot.
Unfortunately we don't have any spare phones to complete testing and obtain the failed logs for Cisco.
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