<div>Hey all!</div>
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<div>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:</div>
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<div>PRI Span: 3<br>PRI Span: 3 < Protocol Discriminator: Q.931 (8) len=40<br>PRI Span: 3 < TEI=0 Call Ref: len= 2 (reference 857/0x359) (Sent from originator)<br>PRI Span: 3 < Message Type: SETUP (5)<br>PRI Span: 3 < [04 03 80 90 a2]<br>
PRI Span: 3 < Bearer Capability (len= 5) [ Ext: 1 Q.931 Std: 0 Info transfer capability: Speech (0)<br>PRI Span: 3 < Ext: 1 Trans mode/rate: 64kbps, circuit-mode (16)<br>PRI Span: 3 < User information layer 1: u-Law (34)<br>
PRI Span: 3 < [18 04 e9 80 83 08]<br>PRI Span: 3 < Channel ID (len= 6) [ Ext: 1 IntID: Explicit Other(PRI) Spare: 0 Exclusive Dchan: 0<br>PRI Span: 3 < ChanSel: As indicated in following octets<br>
<strong>PRI Span: 3 < Ext: 1 DS1 Identifier: 0<br></strong>PRI Span: 3 < Ext: 1 Coding: 0 Number Specified Channel Type: 3<br>PRI Span: 3 < Ext: 0 Channel: 8 Type: CPE]<br>
PRI Span: 3 < [20 02 00 e2]<br>PRI Span: 3 < Network-Specific Facilities (len= 2) [ Toll Free MEGACOM ]<br>PRI Span: 3 < [6c 0c 21 83 37 32 37 34 30 33 34 30 37 34]<br>PRI Span: 3 < Calling Number (len=14) [ Ext: 0 TON: National Number (2) NPI: ISDN/Telephony Numbering Plan (E.164/E.163) (1)<br>
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<div>The key part is the "<strong>Ext: 1 DS1 Identifier: 0</strong>" 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 "<strong>Ext: 1 DS1 Identifier: 1</strong>", 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.</div>
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<div>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.</div>
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<div>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.</div>
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<div>Thanks in advance everyone!</div>
<div><br clear="all">v/r,<br>Me<br><br></div>