[cisco-voip] Design question on Voice Gateways / CFB / Transcoders

[Peter Slow]

two gateways gives you redundancy if one goes down, and allows you to
do maintenance in a less service impacting way.

...I now someone said it already, but the part about having adequate
xcode resources in the devices at the same physical site as the UCCX
servers is important.

Consolidating everything into one box really just gives you a single
point of failure, IMHO. the increased risk isn't worth the reduction
in management effort.

-Peter


On Wed, Apr 28, 2010 at 2:43 PM, Bill <bill at hitechconnection.net> wrote:
> I understand how transcoding and conferencing work. I also know to configure
> the CFB at the remote sites as well. My general question is would it be
> better to consolidate all of the TDM interfaces in one gateway and all of
> the additional DSP functions in another or split them up or consolidate
> everything in a single 3845 with a shelf spare chassie if needed.
>
>
>
> ________________________________
>
> From: Scott Voll [mailto:svoll.voip at gmail.com]
> Sent: Wednesday, April 28, 2010 10:01 AM
> To: Bill Riley
> Cc: cisco-voip voyp list
> Subject: Re: [cisco-voip] Design question on Voice Gateways / CFB /
> Transcoders
>
>
>
> Really depends on where the resources are going to be used.  you will need
> the transcoding resources at the UCCx site.  That is where all the
> transcoding will be done.  As for Conference resources, where ever it will
> be used.  I'm guessing split.  some at each site.
>
>
>
> YMMV
>
>
>
> Scott
>
> On Tue, Apr 27, 2010 at 6:49 PM, Bill Riley <bill at hitechconnection.net>
> wrote:
>
> I am doing a redesign of an existing  voice network. We currently have two
> 3845’s. One 3845 has three MFT-2 port PRI’s. Four of the PRI’s are used for
> inbound and outbound calls. One port on the third MFT is used as a TIE line
> between a Nortel box. We also have the other 3845 with two MFT-2 ports. Four
> of those PRI’s are used for inbound and outbound calling. The TDM gateways
> are separated like this for business / political purposes which I can get
> around if I need to and consolidate all of the TDM cards into one 3845 by
> purchasing some Network Modules. The other design problem is they are
> currently sending a substantial number of calls over the WAN to the central
> UCCX servers as G.711. This is causing some network congestion problems at
> their remote facilities. At any given time I would estimate about 60
> concurrent calls coming in as G.711 over the wan to UCCX. I now want to
> change the codec to G.729 over the WAN so I need to add some transcoding
> resources. They also have their conference bridges setup to use Call Manager
> as G.711 so I want to move those conference into the router as well. I know
> how to do all this and the configuration is not a problem, I am more
> concerned with what would be the best use of the routers. Should I leave the
> TDM interfaces split like this. Purchase two fully populated NM-HDV2 with
> four PVDM2-64. Place one NM module in each router and split the CFB’s /
> Transocding.  Should I consolidate the TDM interfaces in one router and
> configure the other router with two NM’s to only do the CFB and Transcoding?
> Or should I try to consolidate everything and place all 9 PRI’s and the
> extra NM’s for CFB and transcoding in one router. I have the extra physical
> routers so I think I should use them.
>
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