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

[Olivier]

2008/12/17 Andrew Thomas <andy at datavox.co.uk>

> 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).


Fine, so, using  this setup as an example, would say the norm in the UK, is
to connect to ISDN-BRI in ptp (reading from ports 1 and 2 configuration), or
to connect using ptmp (reading from ports 3 and 4 configuration, dedicated
to isdn modems) ?



>
> 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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