I am trying to upgrade the SCCP firmware of a 7941 model, but the display locks on a upgrading message.
The new firmeware´s version is 8.X and the old one is previous from 7.X .
I found some Cisco documents that warned about the impossibility of a direct upgrade, if the 7941 old version was previous 7.X. In this case, I had to make a 7.X upgrade and, after this, a second upgrade to a 8.X version. But I´ve seen the document only after the problem.
I´ve reseted to the default factory conf and, after this, tried the upgrade through CallManager Express and a TFTP server (I´ve configured the .xml config file and uploaded all the files necessary to the firmware upgrade), but it didn´t work. I didn´t try to change the firmware to SIP and back to SCCP.
Does somebody had already this problem?