Was the cluster reboot done after applying the device pack on all the servers?
Can you try restarting the TFTP service on all the TFTP servers as well.
What is the exact message on the display of 8941 IP phones?
Are all of these phones remote to the TFTP server or even the phones local to the TFTP server facing the issue?
The cluster done multiple reboots & tftp service restarted several times,i am facing this issue after applying 7821 device pack,themessage 8941 showing stii upgrade.the phones are local.
We are using CUCM verison 9.1 & the firmware version for 8941 is SCCP8941_8945.9-4-1-9,i have been reigisters to sccp.
except this phone modles all device are registered,i am facing this issue after applying device pack for 7821.
If u are using CUCM version 9.1(2) with 9.4(1) for 8941 , u require a Device pack for the phone to work.Even though it was working earlier, can u check for Device Pack?also, share show version active
Also, cross-check as Brian has suggested.You can login through CLI and run file list tftp *8941* to check the available firmwares.
Thanks for your reply,
I will download device will check it.
show version active
Active Master Version: 18.104.22.16800-28
Active Version Installed Software Options: