[cisco-voip] IOS / CM

[Scott Voll]

So we are moving from CM 4.2 to 7.1.5.

according to this:
http://www.cisco.com/en/US/customer/docs/voice_ip_comm/uc_system/unified/communications/system/versions/IPTMtrix.html#wp1016708we
need all our Router up to 15.0.1M for CM 7.1.3

my questions:

1.  What about 7.1.5?
2.  Why do you need to upgrade to a 15.0 IOS?  Could 12.4T work?
3.  If we upgrade IOS to 15.0 will the Routers (VGWs) still work on CM 4.2?

If you have any info on the relationship between IOS and CM I would like to
understand it more completely.  I have both H323 and MGCP VGW's.  Since some
of them are H323 does the IOS requirements go out the window?

Thanks

Scott
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