That's what I thought, but have not tested it to know for sure. 

 

As a follow up, as a general design what would be better. 

 

Using the Location setting as a form of Call-Admission-Control, or use
various QOS and IOS mechanisms to implement CAC on the Gateway Routers. 

 

IMO, I would rather have CAC implemented on the Routers, leaving UCM to
process calls, which is why I have usually set the Audio Bandwidth setting
under Locations to Unlimited. 

 

Thanks, 

 

Stephen Manuel

 

From: Cristobal Priego [mailto:cristobalpri...@gmail.com] 
Sent: Wednesday, June 22, 2011 2:37 PM
To: Stephen Manuel
Cc: ccie_voice@onlinestudylist.com
Subject: Re: [OSL | CCIE_Voice] UCM LOCATION QUESTION

 

Stephen,

the call will fail
you're going to get a message on the phone saying "not enough bandwidth" and
the call will drop

2011/6/22 Stephen Manuel <srman...@bellsouth.net>

Experts, 

 

I have a somewhat basic question just clear up something that is lingering
in my mind. 

 

The example is this:

 

In a multiple remote location site company, with a Centralized UCM
architecture, each site has it's own device pool, region, and location
settings. 

 

All the DN's on the phones for all sites are in the same PT, meaning calls
between sites are on net via their existing WAN infrastructure and not the
SIP Trunk/PSTN. 

 

Remote site A is rather large 50-60 phones.

 

Remote site B is rather small 10-15 phones. 

 

Calls between regions use g729

Calls to the PSTN using a SIP Trunk use g711

 

The location setting for site A is unlimited.

The location setting for site B is 256

 

What I am wondering is this, Site B has 3 calls to the PSTN using the SIP
Trunk using g711 @ 80k per call which equals 240k. The SIP trunk is also in
it's own Device Pool, region, etc.

 

Now someone from Site A calls site B, the bandwidth at Site A is unlimited
so no issue there. 

According to the Cisco Research I've done, a call requires 2 streams. 

Since Site B is using 240 of 256k of bandwidth on the 3 PSTN/SIP Trunk
calls, when a g729 calls comes inbound  which requires 24k  which causes
Site B location setting to be exceeded, will the call fail or succeed ??

 

IMO, the call will fail.

 

Thanks, 

Stephen Manuel

 

 

 


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_______________________________________________
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www.ipexpert.com

Are you a CCNP or CCIE and looking for a job? Check out 
www.PlatinumPlacement.com

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