[cisco-voip] CUCM6 MCS to 8.6 UCS bridged upgrade Question

[Ryan Ratliff]

> 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?

Best-case:  IOS configured for 6.x DSPfarm and works with no issues.
2nd Best-case: They don't register at all.
Worst-case:  They register, appear to work, but leak calls randomly due to version incompatibility and/or bugs.

Your customer is going to be in a pinch either way.  Hopefully they can re-examine the need for local DSP resources on all of these gateways with the upgraded UCM and find that they are no longer required for their call flow OR you/they can do some testing to confirm that they can register successfully to the newer UCM and run just fine.  

-Ryan

On Jan 8, 2013, at 10:46 AM, Boon <ciscovoipuser at gmail.com> wrote:

Thanks for the info all. 

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.

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. 

More than half of their gateways do not have enough DRAM and Flash to support 15.1(4)M1. The requirements is 512/128. 

To upgrade all of these gateways it will cost a considerable amount of money. 

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?

I think I know the answer but would like a 2nd opinion. 

Thanks
_______________________________________________
cisco-voip mailing list
cisco-voip at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20130108/2f7ba269/attachment.html>