[cisco-voip] [cisco-nas] AS5400 More than 256 HDLC channels per CT3 card

[Joseph Mays]

This is useful information, but does it allow me to add more HDLC channels to a channel-group in a controller config? The problem I am having is that we add ds1 channels to ds3’s on an AS5400, add channel-gorups and pri-groups to the ds1’s, like so...

controller T1 1/0:26
framing esf
channel-group 0 timeslots 1-15 speed 64
loopback network ignore
pri-group timeslots 16-24
description combo PRI/T1

... and when channel-groups equal to 256 hdlc channels for the particular ds3 card have been added then the following happens....

AS5400#config t
Enter configuration commands, one per line.  End with CNTL/Z.
AS5400(config)#controller t1 7/0:14
AS5400#(config-controller)#channel-group 0 timeslots 1-22 speed 64 
%Insufficient HDLC resources to create channel group

So what I specifically need is to be able to add more channel-group timeslots to the ds1’s on the unit. If I add resource pools as shown in your example below, will it allow me to add more channel-groups and channels to a t1 controller config?


From: Aaron Leonard 
Sent: Friday, April 18, 2014 5:29 PM
To: Joseph Mays 
Cc: nas cisco 
Subject: Re: [cisco-nas] AS5400 More than 256 HDLC channels per CT3 card

Joe, the 256 HDLC framers are on each CT3 card, and you can't use the framers on one card to handle channels on another card. However, you can go past the HDLC channel limit by adding NextPort DSPs to handle the HDLC framing ("Tardis"), and then the DSPs do act as a global pool.

Afaik, we never documented anything on this on CCO.  Below is a snippet of a config that uses RPM to switch HDLC calls to a "Tardis" DSP pool.

Hth,

Aaron

____


Yes, you can use RPM to route your HDLC calls to NP resources. Basically 
you create a DNIS based customer profile and specify NP resource range for 
that number, such that the call will be routed to NP resources instead of 
default FreeDM resources. We use that in our Tardis testing and regression. 
Here is the configuration looks like. If you need some automated help then 
we have a ready-to-go scripts running for both AS5400 and AS5850.

===
resource-pool enable

resource-pool group resource tardis-ports
  range 1/0 - 1/323

resource-pool profile customer tardis-cust
  limit base-size all
  limit overflow-size 0
  resource tardis-ports digital
  dnis group tardis-dnis

dialer dnis group tardis-dnis
   number <... your DNIS number here...>


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On 4/16/2014 11:04 AM, mays at win.net (Joseph Mays) wrote:

  The standard CT3 card for an AS5400 only allows 256 HDLC channels, or about 10.5 T1’s. Is there any other T3 card available for an AS5400 that supports more HDLC channels, or any way to increase the number of HDLC channels supported? Also, if I have two CT3 cards in a unit, are the HDLC channels for each tied to their respective cards, or are they available system-wide? That is, would two cards required that I set up 10 T1’s on each card, or would they allow me to set up 20 T1’s on one card and no T1’s on the other?

  Joe Mays


   

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