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

John freeswitch at earthspike.net
Thu Jun 9 22:10:11 MSD 2011

[I've forked this thread as it really should have been 3 separate 
threads to start with.]


I have tried every combination I can think of, except 10 digits which I 
will give a go.  That makes sense as in the general case it would permit 
non-geographical numbers to be presented.

The lines are provided as 2 x ISDN2e with a lead number covering all 4 
channels.  The NTE8s are labelled 1-2 and 3-4, so not separate 
individual lines, I thnk.

We currently have a Single Number DDI in addition, and hope to increase 
that to 2 very soon; the 3 numbers between them will serve 3 separate 
business units, so we want to be able to present the correct outbound 
CLI from each business unit.  We also have a remote call forward from 
another number to the lead number, but presenting that really would be 
CLI spoofing, so I am not expecting that to be permissible. But I would 
expect those that are directly allocated to the 2 lines/4 channels to be 
allowed to be presented.


On 09/06/11 08:27, shouldbe q931 wrote:
> On Mon, Jun 6, 2011 at 10:36 PM, John<freeswitch at earthspike.net>  wrote:
>> Hello,
> <snipped for brevity>
>> 2. We have 2 Single Number DDI numbers configured over the 4 channels.
>> I want to set up outgoing calls so that they can appear to come from
>> either of the two numbers, but at present the outgoing CLI appears to be
>> overridden by the telco (BT) to only use one of the numbers.  Has anyone
>> got this working in UK, and what is the format for the
>> outbound_caller_id_number: last 6 digits or full 11 digits?  I note that
>> the inbound called number is only the last 6 digits.
> <snipped for brevity>
>> Thanks for all the great support I have already got just from editing my
>> Wiki User page; this is a friendly group!
>> John
> I can only comment on the BT part.
> If they are two individual lines, you're out of luck with BT, as they
> do not allow CLI spoofing, which this would be.
> I would suggest sending BT the same number of digits that they send
> you, if that doesn't work try 10 digits. If  you are not sending the
> "correct" number of digits for a valid DDI on the trunk, then they
> will send the lead number for the trunk.
> Cheers
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