Tomorrow night I'm cutting over after upgrading a CUCM 4.1 to CUCM 8.5.1., System version: 8.5.1.10000-26
Today I'm looking into the existing gateways checking for compatibility with the new system.
Here's what I have:
H.323: 1 2811 router running Cisco IOS Software, 2800 Software (C2800NM-SPSERVICESK9-M), Version 12.4(24)T1
The rest are MGCP:
2811 running Cisco IOS Software, 2800 Software (C2800NM-ADVIPSERVICESK9-M), Version 12.4(24)T
2801 running Cisco IOS Software, 2801 Software (C2801-ADVIPSERVICESK9-M), Version 12.4(24)T1
2801 running Cisco IOS Software, 2801 Software (C2801-ADVIPSERVICESK9-M), Version 12.4(24)T1, RELEASE SOFTWARE (fc3)
2801 running Cisco IOS Software, 2801 Software (C2801-SPSERVICESK9-M), Version 12.4(3e), RELEASE SOFTWARE (fc2)
2801 running Cisco IOS Software, 2801 Software (C2801-SPSERVICESK9-M), Version 12.3(11)T10, RELEASE SOFTWARE (fc4)
According to this site:
http://www.cisco.com/en/US/docs/voice_ip_comm/uc_system/unified/communications/system/versions/IPTMtrix.html#wp1016708
It seems like I should upgrade the IOSes to at least 15.1(3)T.
I've seen other posts that say there "shouldn't" be a problem but if there is to upgrade.
I just want to get a second option (non-TAC, no offense to TAC) about this. I'm hesitant to upgrade six routers, four of which are remote if things might work without a problem as-is.
Thoughts?
