[asterisk-users] Real trunk group w/ DAHDI

[Louis Carreiro]

So another quick look... when a sucessful call comes in it goes to DS1
Identifier 0... the Asterisk CLI shows the following:

    -- Accepting call from '727403XXXX' to '890' on channel 0/11, span 2

Is there a way to get the other span (span 3) to become channel 1/xx? So
when a call comes in asking for DS1 Identifier 1 I see the following:

    -- Accepting call from '727403XXXX' to '890' on channel 1/12, span 3


v/r,
Me



On Sun, Jan 15, 2012 at 9:14 PM, Louis Carreiro wrote:

> Hey all!
>
> 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:
>
> PRI Span: 3
> PRI Span: 3 < Protocol Discriminator: Q.931 (8)  len=40
> PRI Span: 3 < TEI=0 Call Ref: len= 2 (reference 857/0x359) (Sent from
> originator)
> PRI Span: 3 < Message Type: SETUP (5)
> PRI Span: 3 < [04 03 80 90 a2]
> PRI Span: 3 < Bearer Capability (len= 5) [ Ext: 1  Q.931 Std: 0  Info
> transfer capability: Speech (0)
> PRI Span: 3 <                              Ext: 1  Trans mode/rate:
> 64kbps, circuit-mode (16)
> PRI Span: 3 <                                User information layer 1:
> u-Law (34)
> PRI Span: 3 < [18 04 e9 80 83 08]
> PRI Span: 3 < Channel ID (len= 6) [ Ext: 1  IntID: Explicit  Other(PRI)
> Spare: 0  Exclusive  Dchan: 0
> PRI Span: 3 <                       ChanSel: As indicated in following
> octets
> *PRI Span: 3 <                       Ext: 1  DS1 Identifier: 0
> *PRI Span: 3 <                       Ext: 1  Coding: 0  Number Specified
> Channel Type: 3
> PRI Span: 3 <                       Ext: 0  Channel: 8 Type: CPE]
> PRI Span: 3 < [20 02 00 e2]
> PRI Span: 3 < Network-Specific Facilities (len= 2) [ Toll Free MEGACOM ]
> PRI Span: 3 < [6c 0c 21 83 37 32 37 34 30 33 34 30 37 34]
> PRI Span: 3 < Calling Number (len=14) [ Ext: 0  TON: National Number (2)
> NPI: ISDN/Telephony Numbering Plan (E.164/E.163) (1)
>
> The key part is the "*Ext: 1  DS1 Identifier: 0*" part. That's when calls
> fail. Right now, all calls are coming in on span 3 and want to talk to
> Identifier 0 (span 2). If a call comes in on span 2 and requests "*Ext:
> 1  DS1 Identifier: 1*", it fails. I called Verizon and asked them what
> was going on. Turns out, its configured as a trunk group. The tech
> mentioned that I need to figure out how to set my identifiers on the group
> and I should be good to go. I've done a ton of research about
> chan_dahdi.conf and dahdi-channels.conf and I think the answer is trunk
> groups.
>
> 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.
>
>
> Thanks in advance everyone!
>
> v/r,
> Me
>
>
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