Thanks for the info all. <div><br>One further question. The customer has multiple branch locations each with a voice gateway containing IOS Enhanced Media Resources for transcoder, conf bridge, MTP and also SRST.</div><div>
<br></div><div>The CUCM IOS Compatibility matrix states that the minimum supported IOS is 15.1(4)M1. This is to provide SRST version 8x and SCCP ccm version 8x. </div><div><br></div><div>More than half of their gateways do not have enough DRAM and Flash to support 15.1(4)M1. The requirements is 512/128. </div>
<div><br></div><div>To upgrade all of these gateways it will cost a considerable amount of money. </div><div><br></div><div>Is it crucial that they're upgraded prior to the upgrade? Will the media resources be affected if left on the current IOS with only 6.1(3) support?</div>
<div><br></div><div>I think I know the answer but would like a 2nd opinion. </div><div><br></div><div>Thanks</div>