[Freeswitch-users] UK ISDN outgoing CLI (was Re: FreeTDM - Sangoma B700 - ISDN connection questions - UK)

[Jan Berger]

I assume CLIP and COLP are Q.932, or more exactly Q.951 -and not some BT
scheme using Q.931 only?

 

I need to dig into the spec a little on this one .

 

/Jan

 

  _____  

From: freeswitch-users-bounces at lists.freeswitch.org
[mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of John
Sent: 8. juli 2011 00:33
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] UK ISDN outgoing CLI (was Re: FreeTDM -
Sangoma B700 - ISDN connection questions - UK)

 

Jan,

I have tried every combination of unknown, national and international with
every combination of number length.  I have also confirmed that by using
wanpipemon to capture the D-channel messages.  When I went through them with
Wireshark and compared them with Q.931, everything was being set correctly
by the Sangoma card/drivers.  I am at the point now where I need someone who
has worked with BT ISDN switches to tell me what they can accept.  It seems
that this is a national secret over here, or instead that they can accept
almost anything and my lines have been configured to override the outgoing
calling number with the base number.  Either way, the only way in which I
think I am now going to get a result is by booking a fault.  Your helpful
comment about modern switches being able to work this out also confirms that
I am probably not looking at a Q.931 formatting error on my part, but on a
blockage in the exchange.  I don't have a problem with the called number,
for example.

John

On 07/07/11 23:09, Jan Berger wrote: 

I must admit I don't remember what CLIP and CLOP is - and my Q.931
experience is getting a bit rusty.

Can you get a snoop of L3 out and in so I can see what you send and what the
switch responds back?

I prefer to use Called and Calling - The numbers contain a few bits that
tell what number this is. The most common are unknown, national and
international. These bits must match the actual number you send. The 10
digit number is a unknown, the 11 digit is a national. International start
with 00 nn

On top of that you will face that modern switches are quite capable and able
to configure whatever behaviour they want per line with regards to
called/calling - so you need to find out exactly what the switch expect on
both called and caller for outgoing to behave as you want. 

/Jan

>>
>> On our PRI systems we are sending 10 digits (2071231234), and on the
>> BRI system we are sending 11 digits (02071231234).
>>




 

 
 
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