CME 8 and 3945 router IOS 15.1.1 T

we are experiencing random phones that unregister with following error in log:
089919: Aug  5 15:31:18 EDT: %IPPHONE-6-UNREGISTER_ABNORMAL: ephone-60:SEP0026CBCXXXX IP:X,X.X.X Socket:168 DeviceType:Phone has unregistered abnormally.
we have been chasing our tails on this. network is saying its the router , CME team is saying its a network issue.
i did find this bug but its on a 3825 router with same IOS and CME version
http://www.ciscosystems.com/en/US/docs/ios/15_1/release/notes/151TCAVS.html
CSCth28007
Symptoms: Cisco IP phone users may experience dropped calls, resetting phones, and one-way audio.
Conditions: These symptoms are observed on a Cisco 3825 router that is running Cisco IOS Release 15.1(1)T and CME 8.0 when there are 4 or more active calls. The symptoms occur with the following topology:
Router/ PBX ---pri---- CISCO3825 ----sccp---- ip phone.
It is a normal external call: PSTN <-----> IP phone calls.
Workaround: Install Cisco IOS Release 12.4(15)XZ2 or another release earlier than Release 15.n.

I would recommend opening a TAC case and referecing the defect you think you're experiencing.  You should be able to work with the assigned engineer to resolve the issue.
--Matt

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    IOS corruption may also contribute err but I have mostly seen either a crash of the Boot process or no booting at all, and the router gets stuck after the POST.
    You can download IOS from the Cisco website as long as you are not using the router in production and/or for profit from a business, all you need is a valid CCO ID and a Smartnet (ESW) or UCSS contract.
    That should be able to help you to download the software and use it for non production environment.
    HTH

  • When I log onto my 2811 router (IOS Ver 12.3(8)T8 it dumps me

    When I log onto my 2811 router (IOS Ver 12.3(8)T8 it dumps me into enable mode automatically. Is there a fix for this? Thanks for any help you can provide.

    David
    There are a couple of things that can result in the session going directly into enable mode instead of into user mode. I think the most likely one is a configuration on the vty lines which specifies privilege level. I suggest that you check the configuration of the 2811 and look under the vty lines for privilege level 15. If it is there remove it and your sessions should start in user mode.
    It is also possible that if you are using aaa to authenticate and authorize that the user ID you are using has been configured to automatically give enable access. But I am guessing that the issue is the privilege level on the vty lines.
    HTH
    Rick

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