[cisco-voip] Cisco compatability Matrix

[costas georgiou]

Hi All,
 
I am looking to move Phones and Gateways onto a centralised CUCM cluster running 8.5 from 7.1.  I have been looking at the Cisco Compatability matrix and it does not give you the minimum requirement for phone firmware or gateway IOS, it mentions 15.1(3) T as the minimum, I am sure you can use something lower.  Does anyone know of any documentation out there that can provide this information?
 
Regards
 
Costas 		 	   		  
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