Cisco 8841 and 8851 Phone issues

[Siva chinap]

Dear Gents,

Often phone is getting hanged , we are using CUCM 11.x all the phone firmware are up to date. Wondering what could be the issue?

[Manish Gogna]

Hi Siva,

Did the issue start after any firmware or cucm version upgrade? Was any change made on the switch to which the phones are connected? You can provide the exact cucm version and firmware version on these IP phones to check for any known bugs. Also, how frequent is the issue  and how do you fix it?

HTH

Manish

[Siva chinap]

The issue users facing when a incoming calls arrives to the IP Phones unable to answer it. it got ganged multiple needs to press the answer key.

CUCM VERSION: 11.5.1.10000-6

FIRMWARE VERSION : CISCO 8841 :- SIP88xx-11-5-1-18 Cisco 8851:- SIP88xx-11-5-1-18

[Manish Gogna]

Hi Siva,

Apart from verifying the following bug i would suggest engaging TAC to investigate further or maybe publish the latest firmware ES to see if that helps

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCva11762/?reffering_site=dumpcr

Manish

[Siva chinap]

Thanks Maneesh