Yes we have already narrowed down to an 8831 issue OR 8831 Config OR CUCM (but only on 8831) issue as the drops work fine for other phones. 

And then, of course,  the odds of every drop that we happened to plug an 8831 into - is a bad drop.- are astronomical

Have upgraded all 8831s to 8831.10-3-1SR3-5 - Seemed to be fine for a couple of days.  This morning I see that I have one that is showing as unregistered - again.

Getting pretty irritated with these - any other suggestions -

Anyone else experiencing like behavior?

Thanks

I am experiencing the same issues.  Find a solution yet?

So oddly enough - it appears the

does much better regarding drop offs

I had been up for about 9 days on all conference phones.  WHen I saw your post I took a look in Call Manager and I one 8831 phone showing asUnregistered.

Just sent a tech to take a look but it appears that the behavior still happens but less frequently with SR3-5

I am now firmly convinced that this is a firmware issue and Im very surprised that I am not seeing others with the same issue.  Maybe not that many 8831 out there?  anyway the SR3-5 should "help" your issues - has it not?

I am upgrading them now to that rev.  issue just started happening today on 10+ 8831s after months of stable use (after upgrading to 11.5). 

thanks for the quick reply, i will update if i continue to have issues after the upgrades. 

Yea - we are at

11.5.1.11900-26

Update - It appears that when a user unplugs the phone that call manager reports status as "unregistered"

I also have one 8831 showing as "None" - which Im told has never been plugged in

Not sure why users want to unplug a conference phone but the point is - it appears that the new firmware update on my 11.5 version of CUCM has resolved my 8831 Phone issues.

Just curious - does anyone have a list of all possible status designations for Call Manager?  - I did googly that but haven't been able to find the document that details each status.  I think I can stick a fork in this one

Upgraded firmware in environment recently SR3-5 and same issues as before when on different firmware. It may be happening less but we have about 100 of these devices. This has been going on in our environment over a year

I already have the said Firmware (sip8831.10-3-1SR3-5). However i am facing similar issue on 8831.

randomly the Phone would unregister and needs a reboot to register it again.

Hi
So any update on the resolution of this problem? I have a few 8831 that keeps losing registration. sip8831.10-3-1SR2-2

is there a solution to this problem? I have few 8831 with software version  sip8831.10-3-1SR4-2 on CUCM System version: 11.5.1.13902-2 and we are facing the same "phone not registered" error form time to time.

Thank you.