[asterisk-ss7] Alignment problem with libss7

[Victor Neiman]

Hi,

I'm trying to get SS7 communication between Asterisk 1.8.16.0 which has
libss7 installed and the Mobicents Signalling Gateway , using Sangoma A101
hardware in two boxes.  Both boxes are using wanrouter and dahdi. One box
is running Asterisk, the other Mobicents. I have been corresponding closely
with people at Mobicents to get the configuration right for their software
and am fairly sure it is correct. The problem is that when I start up the
Mobicents Signalling Gateway, Asterisk on the other side immediately fills
up with these errors:

[Oct  1 10:55:46] NOTICE[19825]: chan_dahdi.c:3437
> my_handle_link_exception: SS7 got event: HDLC Abort(6) on span 1/0



The box that is running the SGW has the following /etc/dahdi/system.conf:

#autogenerated by /usr/sbin/wancfg_dahdi do not hand edit
> #autogenrated on 2012-09-28
> #Dahdi Channels Configurations
> #For detailed Dahdi options, view /etc/dahdi/system.conf.bak
> loadzone=us
> defaultzone=us
>
> #Sangoma A101 port 1 [slot:4 bus:5 span:1] <wanpipe1>
> span=1,1,0,ccs,hdb3,crc4
> bchan=1-31
>

This config comes straight from the guys at Mobicents. All channels are
bchan.

The Asterisk side looks like this, /etc/dahdi/sysem.conf

#autogenerated by /usr/sbin/wancfg_dahdi do not hand edit
> #autogenrated on 2012-09-28
> #Dahdi Channels Configurations
> #For detailed Dahdi options, view /etc/dahdi/system.conf.bak
> loadzone=us
> defaultzone=us
>
> #Sangoma A101 port 1 [slot:4 bus:2 span:1] <wanpipe1>
> span=1,0,0,ccs,hdb3,crc4
> bchan=2-31
> mtp2=1
>

 /etc/asterisk/chan_dahdi,conf looks like this:

;autogenerated by /usr/sbin/wancfg_dahdi do not hand edit
> ;autogenrated on 2012-09-28
> ;Dahdi Channels Configurations
> ;For detailed Dahdi options, view /etc/asterisk/chan_dahdi.conf.bak
>
> [trunkgroups]
>
> [channels]
> context=default
> usecallerid=yes
> hidecallerid=no
> callwaiting=yes
> usecallingpres=yes
> callwaitingcallerid=yes
> threewaycalling=yes
> transfer=yes
> canpark=yes
> cancallforward=yes
> callreturn=yes
> echocancel=yes
> echocancelwhenbridged=yes
> relaxdtmf=yes
> rxgain=0.0
> txgain=0.0
> group=1
> callgroup=1
> pickupgroup=1
> immediate=no
>
> ;Sangoma A102 port 1 [slot:2 bus:6 span:1] <wanpipe1>
> context=from-pstn
> group=0
> echocancel=no
> signaling=ss7 ;this is ss7 signaling
> ss7type=itu ;using the ITU variant
> ss7_called_nai=dynamic ;NAI for outgoing calls
> ss7_calling_nai=dynamic ;NAI for incoming calls
> ss7_internationalprefix=00 ;international prefix value for incoming calls
> ss7_nationalprefix=0 ;national prefix value for incoming calls
> ss7_subscriberprefix= ;subscriber prefix value for incoming calls
> ss7_unknownprefix= ;unknown prefix value for incoming calls
> ss7_explictacm=yes ;ACM is send as soon as call enters the dial plan...may
> not accepted yet though
> linkset=1 ;arbitrary name for this set of channels
> pointcode=1 ;the point code for this system...aka SPC
> adjpointcode=2 ;the point code for the system that we are signaling to...
> aka APC
> defaultdpc=2 ;the point code for the system that the CICs will be
> negotiated with...aka DPC
> networkindicator=international ;NI value for MTP3
> cicbeginswith=1 ;the starting value of the CICs
> channel=2-31 ;the channels that are CICs
> sigchan=1 ;the signaling channel
>

Any help would be appreciated. Feels like I'm missing something in the
configs but I just can't seem to pin it down.

Regards
Victor
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