[cisco-voip] NFAS with D Channel Back Up

[Jason Aarons (US)]

IOS NFAS requires the PRIs be on same chassis with H323 which defeats
high availability.  I would work with telco to issue change order to
remove the NFAS and split the PRIs between two or more 28xx/38xx. You
can then have telco use Trunk Groups for incoming and you can use Route
Groups/Route Lists for outgoing.

NFAS was great when you had one really big refrigerator PBX with full
redundancy, but when you have distributed routers it doesn't fit as
well.

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of James Buchanan
Sent: Tuesday, July 29, 2008 2:51 PM
To: STEVEN CASPER; cisco-voip at puck.nether.net
Cc: RAWLE GORDON
Subject: Re: [cisco-voip] NFAS with D Channel Back Up

 

You can use NFAS since the requirement is that you use H323. 

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of STEVEN CASPER
Sent: Tuesday, July 29, 2008 1:47 PM
To: cisco-voip at puck.nether.net
Cc: RAWLE GORDON
Subject: [cisco-voip] NFAS with D Channel Back Up

 

 Getting ready to finally convert PSTN trunking from some larger Nortel
PBX systems to Cisco gateways. Up to this point we have been using PRI
tie lines between the PBXs and Cisco gateways and routing PSTN calls via
the PBX.  On the PBXs we are using various PSTN PRIs using primary and
backup D channels and in some cases NFAS. Can these connectivity options
be recreated in a Call Manager 6.1 environment or will I need to order
new PRIs with individual D-Channels? Can not seem to find any info on
this

 

We use a combination or 28xx and 38xx gateways

 

Thanks!

Steve




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