[asterisk-users] Real T1 trunk group...

[Louis Carreiro]

Well... It worked! I would have wrote back sooner but I got swamped
with trying to move a business department to the new facility.

I think my problem was that I fat fingered (actually, overlooked) the
trunk group. The d channels should have been 48 and 72 because I was
using span 2 and 3. I kept putting in 24 for the primary d channel.

I'm going to have to find a window now so I can break it and put it
back together again to verify. I made a change in chan_dahdi.conf on
the group value for the spans too. I'm pretty sure that group value is
for outbound calling though, right? Shouldn't have impacted the trunk
group.

One last thing, the Verizon tech also mentioned that they are using
"Most/Least idle" for call distribution, is there a way for * to do
this too or should it not matter? I'm thinking italy not since both
sides are keeping track of the in use channels so they shouldn't send
a call down a channel that's busy and have a call "collide".

Thanks again Dale!

V/r,
Louis

On Jan 16, 2012, at 6:59 AM, Dale Noll <dnoll at wi.rr.com> wrote:

>
>
> On 01/16/2012 04:48 AM, Louis Carreiro wrote:
>> I've been banging my head against the wall for a while (almost 18 hours today alone) with this one... I migrated our incomming T1's from the Option 11 to our Asterisk box this morning. We have 1 local T1 and 2 long distance T1's. The local T1 went over with out a hitch. The problem is with my 2 long distance T1's. The switch on the other end is a DMS250 I'm told so I set Asterisk to DMS100 and got the timing, framing, etc all set. Well, the D channels came up so thats good. I started getting dropped calls every once in a while. I did a debug on the spans and saw the following:
>
> Sounds similar to what I am doing. Migrating from a Nortel Option 61 to Asterisk.  I have everything set, and am just waiting for an appropriate window to move the 4 T-1s (2 trunk groups). All PRIs are national though, not DMS100.
>> I tried configuring a trunkgroup and set the primary dch to 24 and the bdch to 72 and then then spanmap'ed span 2 and 3 into group 1 (e.g. 2,1,0 and 3,1,1) but I don't see anything when I do a "dahdi show channels" or a "pri show spans" or a "pri show channels", not even the channels not in the group. If I delete the trunkgroup, all three commands return all the channels.
>> I'm just curious if I'm going down the right path with trunkgroups for this or if there is something else to take care of the DS1 Identifier issue.
>>
> Here are the relevant portions of my configs, I based them on a working model for PRIs connecting the Asterisk to the Option 61 as TIE trunks.  This config has two dual port cards, with span 1 and 3 being a group and 2 and 4 being a different group. I hope this helps. (Or perhaps identifies something I have wrong that may not have been found yet ;-)
>
> Dale
>
> ###################################
> /etc/dahdi/system.conf
> ###################################
>
> # Span 1: TE2/0/1 "T2XXP (PCI) Card 0 Span 1" B8ZS/ESF RED
> span=1,1,0,esf,b8zs
> # termtype: unknown
> bchan=1-23
> dchan=24
> echocanceller=hwec,1-23
>
> # Span 2: TE2/0/2 "T2XXP (PCI) Card 0 Span 2" B8ZS/ESF RED
> span=2,2,0,esf,b8zs
> # termtype: unknown
> bchan=25-47
> dchan=48
> echocanceller=hwec,25-47
>
> # Span 3: TE2/1/1 "T2XXP (PCI) Card 1 Span 1" B8ZS/ESF RED
> span=3,3,0,esf,b8zs
> # termtype: unknown
> bchan=49-71
> dchan=72
> echocanceller=hwec,49-71
>
> # Span 4: TE2/1/2 "T2XXP (PCI) Card 1 Span 2" (MASTER) B8ZS/ESF RED
> span=4,4,0,esf,b8zs
> # termtype: unknown
> bchan=73-95
> dchan=96
> echocanceller=hwec,73-95
>
> ##############################
> /etc/asterisk/chan_dahdi.conf
> ##############################
>
> [trunkgroups]
> trunkgroup => 1,24,72
> trunkgroup => 2,48,96
> spanmap => 1,1,0
> spanmap => 3,1,1
> spanmap => 2,2,0
> spanmap => 4,2,1
>
> [channels]
>
> ....
> ; Span 1: TE2/0/1 "T2XXP (PCI) Card 0 Span 1" B8ZS/ESF RED
> ; General Trunking
> group=1
> context=from-pstn
> switchtype = national
> signalling = pri_cpe
> channel => 1-23
>
> ; Span 2: TE2/0/2 "T2XXP (PCI) Card 0 Span 2" B8ZS/ESF
> ; IVR Trunking
> group=2
> context=from-pstn
> switchtype = national
> signalling = pri_cpe
> channel => 25-47
>
> ; Span 3: TE2/1/1 "T2XXP (PCI) Card 1 Span 1" B8ZS/ESF
> ; General Trunking
> group=1
> context=from-pstn
> switchtype = national
> signalling = pri_cpe
> channel => 49-71
>
> ; Span 4: TE2/1/2 "T2XXP (PCI) Card 1 Span 2" (MASTER) B8ZS/ESF RED
> ; IVR Trunking
> group=2
> context=from-pstn
> switchtype = national
> signalling = pri_cpe
> channel => 73-95
>
>
>
>
>
> --
> "The truth speaks for itself. I'm just the messenger."
>     Lyta Alexander - Babylon 5
>
>
> --
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