The CUCM is waiting for the far end to initiate TCS because that is how it is 
configured by default. As the document you reference noted, you can uncheck a 
box to modify this behavior. 

When you insert a CUBE in the call path then you either need to:

1. Disable the wait for far end TCS option OR

2. Leverage Fast Start by forcing MTP (and adding a MRGL and choosing your fast 
start codec option)

The CUBE doesn't initiate TCS. So, you have to leverage the CM config to 
accommodate the call scenario. 

HTH.

-Bill
--
William Bell, CCIE #38914
blog: http://ucguerrilla.com
twitter: @ucguerrilla




On Apr 14, 2013, at 8:03 PM, Barrera, Hugo wrote:

> Hi Guy’s,
>  
> Regarding the attached link, why does CUCM have to wait for the far end TCS 
> before it can send it’s own TCS what is the reason for this? ALSO what are 
> the best debugs to run when troubleshooting this??
>  
> https://supportforums.cisco.com/docs/DOC-2529
>  
> Hugo
>  
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