8945 hanged up to upgrade firmware

[diaeldin19]

Hi,

i have model 8945 with default firmware version sccp 9-3-1-19 and upgraded this model inside call manager to the latest version  SCCP894x.9-4-2SR3-1. the problem is when i connect new 8945  to register into call manager it is hanged up .

i tried to upgrade phone one by one ( using local tftp Tftpd32) from old version to upper but also stop upgrade version 8941_8945-sccp.9-3-4-17 and last successful upgrade version  is SCCP8941_8945.9-3-2SR1-2  (my idea  try upgrade from old version to upper till reach  SCCP894x.9-4-2SR3-1) but failed . i tried to downgrade version of this model into call manger from SCCP894x.9-4-2SR3-1 to sccp 9-3-1-19 or any version less than SCCP894x.9-4-2SR3-1 , also call manager rejected to downgrade .

kindly help me to be able register this model and use it

[Anthony Holloway]

Yeah, this can happen when a middle firmware version is needed.

See this post, which says you need to upgrade to 9.3(4) first, then go to 9.4(2).

https://community.cisco.com/t5/collaboration-voice-and-video/cisco-8941-8945-ip-phone-stuck-or-frozen-with-quot-upgrade-in/ta-p/3145749

If the phone is currently stuck, you will need to cut power to the phone in order to reboot it.