D Channel on anything but 24?

Asterisk Asterisk Support
1

Good morning,

I’m getting 2 Asterisk boxes setup for our companies. The first one went up with little problems, but I’m having an issue with the second.

They’re using identical TE120P cards, but the second company uses a multiplexed T1 using a max of 12 channels for voice, rest for data, and I was told the D Channel is on 12 instead of 24

Can this be possible? When I try to setup my zaptel.conf files to show that, it errors out. However, if I configure my zaptel.conf like this:

span=1,1,0,esf,b8zs
bchan=1-11
dchan=24

It comes up ok, but the D channel isn’t on the right one. If I set dchan=12, I get an error and asterisk will not start up.

Is there something I can do about this, or maybe does the phone company have to change our d channel? Sorry if that’s a silly question, but I’m not too up on all of this stuff.

Thanks a ton! 8)

Dan

2

Hi
This is “normal” for fractional lines. no what does ztcfg show when you load the driver? also what does zapata.conf look like?

Ian

3

Thanks for the prompt reply.

Here is my zapata.conf:

;
; Zapata telephony interface
;
; Configuration file

[trunkgroups]

[channels]

group=1
signalling=pri_cpe
switchtype=national
context=from-zaptel
channel=1-11

language=en
rxwink=300              ; Atlas seems to use long (250ms) winks
;
; Whether or not to do distinctive ring detection on FXO lines
;
;usedistinctiveringdetection=yes

usecallerid=yes
hidecallerid=no
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=no
echotraining=800
rxgain=0.0
txgain=0.0
callgroup=1
pickupgroup=1
immediate=no

;faxdetect=both
faxdetect=incoming
;faxdetect=outgoing
;faxdetect=no

;Include genzaptelconf configs
#include zapata-auto.conf

;Include AMP configs
#include zapata_additional.conf

and here is what I get when I run ztcfg -vv

Zaptel Configuration
======================

SPAN 1: ESF/B8ZS Build-out: 0 db (CSU)/0-133 feet (DSX-1)

Channel map:

Channel 01: Clear channel (Default) (Slaves: 01)
Channel 02: Clear channel (Default) (Slaves: 02)
Channel 03: Clear channel (Default) (Slaves: 03)
Channel 04: Clear channel (Default) (Slaves: 04)
Channel 05: Clear channel (Default) (Slaves: 05)
Channel 06: Clear channel (Default) (Slaves: 06)
Channel 07: Clear channel (Default) (Slaves: 07)
Channel 08: Clear channel (Default) (Slaves: 08)
Channel 09: Clear channel (Default) (Slaves: 09)
Channel 10: Clear channel (Default) (Slaves: 10)
Channel 11: Clear channel (Default) (Slaves: 11)
Channel 12: D-channel (Default) (Slaves: 12)

12 channels configured.

Here is what Asterisk stops on:

 [chan_zap.so] => (Zapata Telephony w/PRI)
    -- Unregistered channel 1
    -- Unregistered channel 2
    -- Unregistered channel 3
    -- Unregistered channel 4
    -- Unregistered channel 5
    -- Unregistered channel 6
    -- Unregistered channel 7
    -- Unregistered channel 8
    -- Unregistered channel 9
    -- Unregistered channel 10
    -- Unregistered channel 11
    -- Unregistered channel 12
Asterisk died with code 1.
Automatically restarting Asterisk.

Now when I change d channel to 24, it comes up ok.

This is all with a loopback cable connected.

Thanks,

Dan

4

Well I guess the point is moot anyhow. We just got confirmation from the phone company that they will provision the D channel on 24, which is what they prefer anyhow, so it all will work out (I hope)

Thanks again for the reply.

Dan