[asterisk-ss7] libss7 - two linksets with different DPCs but the same CIC Number

Mon Dec 15 07:30:07 CST 2014

Hi,

At this moment I'm using chan_ss7 for this setup with two linksets. There is
no problem in having same CIC numbering on each E1. There is a problem with
CGB and there is no BLO command I can use.

That is why I'm trying to config libss7. But I cannot find the proper config
in order to have same CIC numbering on the 2 E1s. The error I get is:

WARNING[21451] sig_ss7.c: Linkset 1: SS7 RSC requested on unconfigured
CIC/DPC 2/150

WARNING[21451] sig_ss7.c: Linkset 1: SS7 RSC requested on unconfigured
CIC/DPC 3/150

and so on.

The linksets are combined.

Here is my dahdi system.conf:

loadzone = fr

defaultzone = fr

span=1,1,0,ccs,hdb3

bchan=1-31

#echocanceller=mg2,1-31

span=2,0,0,ccs,hdb3

bchan=32-62

#echocanceller=mg2,32-62

And my chan_dahdi.conf:

[trunkgroups]

annels]

language=en

context=from-pstn

switchtype=euroisdn

signalling = ss7

ss7type = itu

ss7_called_nai = national

ss7_calling_nai = national

linkset = 1

pointcode = 2162

adjpointcode = 2

defaultdpc = 140

cicbeginswith = 2

networkindicator=national

sigchan = 1

channel = 2-31

group = 1

context = from-pstn

linkset = 2

pointcode = 2162

adjpointcode = 18

defaultdpc = 150

cicbeginswith = 2

networkindicator=national

sigchan = 32

channel = 33-62

group = 2

context = from-pstn

Regards,

Lucian

From: asterisk-ss7-bounces at lists.digium.com
[mailto:asterisk-ss7-bounces at lists.digium.com] On Behalf Of Gregory Massel
Sent: Monday, December 15, 2014 1:06 PM
To: asterisk-ss7 at lists.digium.com
Subject: Re: [asterisk-ss7] libss7 - two linksets with different DPCs but
the same CIC Number

I believe that the question was around one linkset with two DPCs and the
same CIC number range.
chan_ss7 refers to this as "combined" linksets and it does NOT support
combined linksets with the same CIC range on each link.
It gets all confused when trying to check for idle cic's and free cic's back
to the idle list as it doesn't match both the CIC and DPC, only the CIC.

It will work if the linkset is not combined, however, if you receive
signalling from an STP via the one signalling link in respect of CIC's
related to the other link, it will get confused and such an installation is
quite common where there is an STP on the other end.

By contrast, libss7 handles this situation perfectly.

PS. Not knocking chan_ss7; it's great. Just saying that, for the situation
described below, it will not work properly.

On 2014/12/15 12:20 PM, Mitul Limbani wrote:

chan_ss7 also does, you need to define two different linksets to be able to
do this.

Regards,
Mitul Limbani,
Business Head,
Enterux Solutions Pvt. Ltd.
110 Reena Complex, Opp. Nathani Steel, 
Vidyavihar (W), Mumbai - 400 086. India
http://www.enterux.com/
http://www.entvoice.com/
email: mitul at enterux.in <mailto:mitul at enterux.in> 
DID: +91-22-71967196
Cell: +91-9820332422

On Mon, Dec 15, 2014 at 3:49 PM, Gregory Massel <greg at csurf.co.za
<mailto:greg at csurf.co.za> > wrote: 

libss7 supports this but chan_ss7 doesn't. 

On 2014/12/15 11:19 AM, Kaloyan Kovachev wrote:

Hi,
it is absolutely normal to have such setup. Each linkset has it's own CIC
numbering

On 2014-12-15 01:06, Lucian Raducanu wrote:

Hi,

Is there any possibility to set up on the same asterisk box 2 E1s with
different DPCs but the same CICs? To be more explicit, the first E1 has CICs
from 1 to 31 and the second E1 also has CICs from 1 to 31. First CIC on each
E1 is the signaling link.

On December 2007 there was reported the same problem, but no solution.

Regards,

Lucian

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