[cisco-voip] Unity Connection 8.5 and G.722

[Paul]

I believe the information about PCM vs. G711 recording is in the design document 
as well.

G.722 and G.711 are both 64kbps codecs so I imagine converting between the two 
is a more trivial process than G.729<->G.711 and likely done on the fly using 
internal software....but I didn't write the thing so I'm just guessing on that 
bit.



----- Original Message ----
From: Jason Aarons (US) <jason.aarons at us.didata.com>
To: Paul <asobihoudai at yahoo.com>; "cisco-voip <(cisco-voip at puck.nether.net)>" 
<cisco-voip at puck.nether.net>
Sent: Thu, January 27, 2011 1:39:13 PM
Subject: RE: [cisco-voip] Unity Connection 8.5 and G.722

Does Connection 8.5 have some software cpu transcoding g722 to g711 (recording) 
or is Unity Connection expecting a external transcoding hardware (IOS) resource? 
I always complained Unity 4/5x, UCCX was hardcoded to 1 codec at setup.  I'm a 
fan of codecs that can adjust like RTP-A, Skype, and usually sound great 
regardless of link.

I normally use G711 for recording on Unity Unified 8x (with Exchange), some 
people can detect the G729 quality and complain. Bandwidth is gigabit or 
greater.

So next I need to find the Unity Connection 8.5 disk space usage/recording time 
based on MCS model. Wonder which doc that is in....

-----Original Message-----
From: Paul [mailto:asobihoudai at yahoo.com] 
Sent: Thursday, January 27, 2011 3:43 PM
To: Jason Aarons (US); cisco-voip <(cisco-voip at puck.nether.net)>
Subject: Re: [cisco-voip] Unity Connection 8.5 and G.722

According to the 8xcucdg.pdf (design guide for 8.x)...

Supported recording Codecs:

PCM linear
G.711 mu-law (default)
G.711 a-law
G.729b
G.726
GSM 6.10

So although it advertises G.722...it doesn't store it in G.722. You must choose 
what codec is used for storage.

PCM has the best audio quality but it'll eat your HDD for lunch if you have a 
voicemail heavy environment.




________________________________
From:Jason Aarons (US) <jason.aarons at us.didata.com>
To:"cisco-voip (cisco-voip at puck.nether.net)" <cisco-voip at puck.nether.net>
Sent: Thu, January 27, 2011 12:17:19 PM
Subject: [cisco-voip] Unity Connection 8.5 and G.722


Can Unity Connection 8.5 take calls in both G.722 and G.711? (the data sheets 
says G.722 is supported) What does it store the message as if you call in with 
G.722 from a 7945? I don’t want any transcoding going on, so I’m assuming in 
software it does some internal transcoding?

Or is it like Unity or UCCX where during setup you have to specify 1 and only 1 
codec ? or is it like a phone where it has a list of codecs advertised?
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