[cisco-voip] Voice Gateway router size

[Lelio Fulgenzi]

You can also consider a traffic study at each location. This will give you quite a bit of information as well. It may cost you some dollars, but can you afford not too? Getting into a three year contract for one or two PRIs you don't use can be more costly. Adding a PRI could take weeks, costing you in other ways. 

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On Nov 22, 2011, at 6:25 PM, gr11 <grccie at gmail.com> wrote:

> Hi all,
> 
> can you guys advise what approach normally you follow while calculating the below requirements:
> 
> 1) Router size - 2801/2811/2821/3845 - any best practice
> 2) ISDN Channel calculation - Ratio of Users to ISDN channels calculation
> 3) DSP Resource calculation
> 
> I have few sites (with size varying from 50 upto 1000 users) lined up for migration from PABX to VoIP. Was calculating the requirements, thought it would be good to have second opinion.
> 
> CUCM is running on 8 and all gateways will be MGCP. 
> 
> If anyone can please share the best practices or their experiences.
> 
> gr
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