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

[Bill]

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.  


_______________________________________________
cisco-voip mailing list
cisco-voip at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-voip

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20100428/4cee91cf/attachment.html>