[cisco-voip] Unity Connections (Native Transcoding)

[Mark Marquez]

Pat,
	You understood correctly. I verified what you asked.   I don't have any hardware transcoding resources located at the remote site (BR2); however, I've assigned Headquarter (HQ) transcoding and software resources to remote site devices.

The voicemail ports are in the "Unity" Device Pool and the Remote site phones are in the BR2 Device pool.

Unity Device Pool
 HQ MRGL with the following Resource Groups:
HQ-HW
PUB-MOH
SUB-SW
PUB-SW

BR2 Device Pool
BR2 MRGL with the following Resource Groups:
HQ-HW
SUB-MOH
SUB-SW
PUB-SW

The region setting of the UC VM ports and the HQ-HW transcoder is the same.  CUCM is setup with three regions HQ, BR1, BR2 and is set to use the system default audio codec which is G729 between regions, per the CUCM Service Parameter.

I read that in Unity you are able to make a registry change that forced it to use CUCM software/hardware transcoding resources.  That apparently is not an option for Unity Connections. I may be wrong in my understanding.




-----Original Message-----
From: pat at wcyv.com [mailto:pat at wcyv.com] On Behalf Of Pat Hayes
Sent: Tuesday, January 25, 2011 4:30 PM
To: Mark Marquez
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Unity Connections (Native Transcoding)

You are saying that when you have UC setup to advertise G711 and G729, your G729 calls to it work, but when it is setup to only advertise G711, G729 calls fail? That sounds like UC is transcoding just fine and the problem is with your hardware transcoders. Have you verified that the transcoders are listed in the device pool/MRGL associated with the voicemail ports and that other devices with that same device pool are able to complete similar call flows?


On Tue, Jan 25, 2011 at 4:39 PM, Mark Marquez <MMarquez at goldsys.com> wrote:
> I hope someone can provide some help. Below is an explanation of my  iissue.
>
>
>
> In Unity Connections I've set the Port Group settings to only 
> advertise G711 mu-law.  From reading I found that Unity Connections 
> does Native Transcoding. My remote branch devices are set to use G729 over the WAN.
> When I dial voicemail from remote branch phones using either the Pilot 
> number or by using the Messages button calls get a fast busy.  If I 
> re-add the G729 codec to the advertised codec list on the Unity 
> Connections Port Group then calls complete. Apparently Native 
> Transcoding on the Unity Server is not working. I do have hardware 
> transcoding resources available to the phones in question but they are 
> not getting invoked. My understanding is that this is normal since 
> Unity Connections should do the transcoding natively via its CPU.  Any help is appreciated.
>
> BTW, phones at headquarters which are set to use G711 do work when 
> Unity Connections is set to only advertise G711.  Remote branch phones 
> connecting over the WAN using G729 fail.
>
>
>
>
>
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