[cisco-voip] T1 dropoffs.

[EKNUDSON at houston.rr.com]

Peter,

That should work fine, though you probably won't experience a true load-balance with that config. What most likely will happen is that all the matching calls will match the first dial-peer until the corresponding voice-port is saturated, then roll over to the next one. If you want to do something a bit more elegant, you can aggregate multiple voice-ports using 'trunk groups,' take a look here at the various trunkgroup commands here:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122tcr/122tvr/vrg_t1.htm


controller T1 1/0
 ds0-group 1 timeslots 1-10 type e&m-fgd
 cas-custom 1
 trunk-group foo

controller T1 1/1
 ds0-group 1 timeslots 1-10 type e&m-fgd
 cas-custom 1
 trunk-group foo

dial-peer voice 1 pots
destination-pattern .......
trunkgroup foo
foward-digits all

Hope this helps!

Eric


----- Original Message -----
From: peter.casanave at us.army.mil
Date: Friday, July 23, 2004 7:53 am
Subject: Re: [cisco-voip] T1 dropoffs.

> Eric,
> 
>   We figured out the problem. It was a software problem in the 
> tactical circuit switch. We have patched it and since have it up 
> and good. By IDSN I meant the default switch type i.e. 5ess which 
> we are using. We are using ds0-groups on a T1 emulating a 5ess. 
> For our pri circuits we emmulate a dms-100. 
>   Here is one thing I had a couple of questions about. If you are 
> not running MGCP in your voice network and your gateway router 
> accesses the T1s by dial-peer instruction, are their any commands 
> required for the gateway to access PBX. I my situation I have a 
> c3745 with 4 T1s. We have two in use right now and may add the 
> other two soon. The two T1s are going to the same PBX. I know MGCP 
> would probably make this work easier but, we are not using this at 
> this time. My current dial-peers are identical for both T1s. The 
> following is an example of how my dial-peers look now:
> 
> dial-peer voice 1 pots
> destination-pattern .......
> port 3/0:0
> foward-digits all
> 
> dial-peer voice 2 pots
> destination-pattern .......
> port 3/1:0
> foward-digits all
> 
> The problem is that we do not have high call volume at this time 
> but, here soon these circuits will be saturated. Will this method 
> work. Is this the best way? And will this load balance at all? I 
> know this may be elementary but, we, my Platoon of Soldiers, are 
> learning this on the fly out of books. We have no formal training. 
> Kevin Knowlen and I who are both members of this mailing-list have 
> extensive router experience but not much with voice. Thank you all 
> for your time.
> 
> V/R,
> PETER CASANAVE
> SSG, USA
> BBN Platoon Sergeant
> 
> 
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