<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 10pt;
font-family:Tahoma
}
--></style></head>
<body class='hmmessage'><div dir='ltr'>
Hi All,<BR>
<BR>
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?<BR>
<BR>
Regards<BR>
<BR>
Costas<BR> </div></body>
</html>