[asterisk-users] libpri and NT-Point to multi-point

[Andrew Thomas]

I have piggy backed a few PBX's off the back of a B410P (4 x BRI) card with no problems.  The ones I used for testing were the Avaya IP Office, Siemens Hi-Path/Hi-Com and various old Panasonics.

All I had to do was to turn on the 100ohm termination on my S0 ports (set as NT on the B410P of course).

I actually have a similar set-up at the moment on our main asterisk system.  2 x BRI trunks (ports 1 & 2 set as TE ptp - for the DDI's etc) and 2 x BRI S0 bus (ports 3 & 4 set as NT ptmp) running and ISDN modem on each (good old Fritz! ones).

So it is possible to run ptmp on NT ports using mISDN - just remember to turn on 100ohm termination on the ISDN card if you only have one device per port.

HTH
Andy

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Olivier
Sent: 17 December 2008 09:08
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] libpri and NT-Point to multi-point

Hello Andrew,
2008/12/17 Andrew Thomas <andy at datavox.co.uk>
If you are connecting to BRI lines then you should be TE - not NT.

Yes of course, you're right.

I was mostly referring to this :
ISDN ------<BRI> ---- asterisk -----<BRI>----- legacy PBX

Then, in this case, as legacy PBX has a set of TE-PtmP or TE-PtP interfaces, asterisk box should also include such NT-PtP or NT-PtmP interfaces.

For instance, would you say that in the UK, most PBXes are using TE-PtP ?


You can run as TE ptp or ptmp with mISDN (not sure about DAHDI yet - not tried the new release).

HTH

 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Olivier
Sent: 17 December 2008 08:14
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [asterisk-users] libpri and NT-Point to multi-point

Hi,

At the moment, libpri /w Asterisk 1.6, Dahdi 2.1, is not supporting NT-Point to multi-point mode.
Here (France), most small PBXes are connected to ISDN through BRI trunks in PtmP (don't know why but it seems the general case).
So this NT-PtmP function would be very helpful to easily slide an Asterisk box between an existing PBX and the network.

Does the same case apply elsewhere (UK, Germany, Italy, ...) ?
Do you think this is needed ?

Regards
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