I have upgrated a cluster of CallManager from 4.1.3 to 6.1(2).the upgrade was smooth and i did not DMA errors.
After upgrade to version 6.1(2), ihad lot of problems with Cisco 7911 IP Phones!!! they didn't load the new firmware (came with CCM 6). I have done the Reset facotory (using 123456789*03 and 3491672850*#) but no solution!!!
i did not have problem with 7960, 7941,..etc i had only problems with 7911 and the wiere is that some of the 7911 did load succussfly the firmware and some did not!!
i don't know what to do. please we need urgent help!!
ths in advance.