[cisco-voip] Location Question

Fri Oct 9 14:50:58 EDT 2009

Yeah, we are rolling out 256k Gold Car running g729 to a bunch of WAN
locations. Just trying to get  it right the first time. I figure being
conservative I can get about 9 calls so if I set my locations to 192K 8
calls - I should be good to go.

Steve

>>> Dennis Heim <Dennis.Heim at cdw.com> 10/9/2009 2:41 PM >>>

CallManager Locations based CAC and Network QoS are like 2 ships
passing in the night. They know nothing about each other, but your end
users will let you know if they don’t match.. J

Dennis Heim
Network Voice Engineer
CDW  Advanced Technology Services
11711 N. Meridian Street, Suite 225
Carmel, IN  46032

317.569.4255 Office
317.569.4201 Fax
317.694.6070 Cell
dennis.heim at cdw.com 
www.berbee.com ( http://www.berbee.com/ )

From:cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Matt Slaga
(US)
Sent: Friday, October 09, 2009 2:18 PM
To: STEVEN CASPER; Tanner Ezell
Cc: cisco-voip at puck.nether.net 
Subject: Re: [cisco-voip] Location Question

It is calculated as 24 per call for locations.  240 in a locations
should get you 10 calls.  It does not calculate header compression
ratios or anything like that, just simple math.  Same as gatekeepers. 
You can watch the locations numbers in the RTM.

From:cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of STEVEN
CASPER
Sent: Friday, October 09, 2009 1:32 PM
To: Tanner Ezell
Cc: cisco-voip at puck.nether.net 
Subject: Re: [cisco-voip] Location Question

You are way off base on your reply,  since my question references the
help screen here is a snippet from the help screen:

G.729 call uses 24 kbps. 
GSM call uses 29 kbps. 
Wideband call uses 272 kbps. 

Note : Each call comprises two call streams. To improve audio quality,
lower the bandwidth setting, so fewer active calls are allowed on the
link to this location. 

Video 

Now of course 240 divided by 24 = 10. I am curious about the "Each call
comprises two call streams". So is it 240 dived by 24 or 240 divided by
48. I would assume by 24 but why the comment about the two call streams
then?

>>> Tanner Ezell <tanner.ezell at gmail.com> 10/9/2009 12:52 PM >>>
Funny, I remember seeing this question on a Cisco exam.

Two things,

1) It's a bad idea to ask questions off an exam here

2) If you don't know that a G.729 call consumes about 24kbps in
bandwidth, you should try harder.

Cheers.

On Fri, Oct 9, 2009 at 12:32 PM, STEVEN CASPER <SCASPER at mtb.com>
wrote:

This is a simple question I think but I want to make sure I understand
what I am reading under the Location Configuration Settings Help
Screen:

I have a location with 240kb of bandwidth designated - how may g729
calls will this support?

Steve
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-- 
Regards,
Tanner Ezell
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