Hit an issue when I was going through an upgrade of the IOS on a 2951 router running CME for a client. Completed the upgrade to a version of IOS with CME 8.6 (was previously running CME 8.0) and I found that after phones had upgraded (took a few hours after all the phones kicked the absolute out of the tftp service on the router), I was seeing the following in the Phone debug displays along the lines of:
12:05:36a 24: Name=SEP90000000473C Load= SCCP45.9-1-1SR1S Last=Phone-Reg-Rej
I couldn't initially see what was going wrong. I ended up running a 'debug ephone register' and it was returning the fact that the max number of ephones was reached. Checking the 'telephony-service' settings showed 'max ephones 165'.
What ended up being the issue was that I needed to accept the license on the system. I had to do a couple of things, first was run the command 'license accept end user agreement'. This didn't actually fix up the telephony service, I had to go into 'telephony-service' and execute 'max ephone 164'. This change then prompted for the agreement of the EULA. Once completed, the phones all registered.
Also saw issues with the cme-srst license but I'll detail that in a different post.
