Cisco 8861 phone is not registering with CUCM 8.5.1

[Neildsilva25]

Call Manager version 8.5.1

Cisco Phone model: 8861

Phone version: sip88XX.10-2-1-16 and sip88XX.10-2-2-16 

Device Pack:cmterm-devicepack8.5.1.18135-1.cop.sgn

CP-8861 is not registering to CUCM 8.5.1, in the CUCM its showing unknow- unknow, but when we GUI the IP on the browser, we can see the phone details on the web browser.

Any Idea ?

[Aman Soi]

Did u restart your server after u added device pack?

regds,

aman

[Neil Dsilva]

Reboot the all the nodes start from Publisher to subs. But issue exist. unknow unknow in the cucm

Regards,

ND

[Terry Cheema]

When you go to the web/GUI of the phone, do you see the TFTP server and is it correct? I dont have a gui right now in front of me but explore it for any logs and also the status messages on the phone itself.

-Terry

Please rate all helpful posts

[Neildsilva25]

Hi Terry

i can see TFTP is correct and when i did the packet capture i can see phone is sending the register msg to CUCM but call manager is responding. 

[Andrew West]

I have around 500 of the 8851 deployed right now and can say their are a few confirmed bugs with the 8841/51/61 family of endpoints. 

Here is just one of them:  https://tools.cisco.com/quickview/bug/CSCuq46373

This one presents where any time you make a line change to the phone it loses and will not register to the CUCM again. The work around is unplugging the phone or shut/no shut on the int. 

Knowing that their are bugs with that firmware it's probably worth opening up a TAC case. 

That being said, does the phone work when it shows up unknown?

[david.vanherck]

Are you using DNS on the CUCMs? Then check that the IP phone has received the correct DNS settings. I had 8861 phones showing registration status None, but they were operational. After updating the DHCP scope with the correct settings, they show now "Registered on <node>". Also check the status messages on the phone for more information.