[Asterisk-Users] Asterisk and ISDN

[Ken Chan]

Hello,
Has anyone actually connect a BRI telephone to the
BRI Card running Asterisk?

I have been trying it and no luck so far.

Here is my configuration:
H/W: T1 Trunk, a few VOIP phones, a few analog phones and
a few BRI Phones (Lucent i2021 phone and Tone Commander phone).

S/W: Asterisk 1.0?????, Linux 2.4-18, "bri-stuff", "wct4xxp"
and "wcfxs" S/W.

Here is my problem:
I connected the BRI phone to the BRI Card and the Q921 Layer was up.  Then
the phone send an Information Element (Q931 Msg) to the BRI Card.
I think that IE message' data is [0x36 0x01 0x01] (it is Switch Hook Message).
Then the Asterisk quicklly release the "call" (although I have not made a 
call connection).

Anyway, I checked the "q931.c" file in "libpri" directory.  In the "q931_receive"
routine, the only "Information Element" message the routine handles is "overlap" dialling stuff.  So, what ever that routine does not recongize, it sends "release" message right away.

So, if anyone has ever connect the BRI phone to the BRI card with Asterisk, please let
me know what S/W you are using.

Thanks
Ken


On Mon, 2004-11-08 at 06:59, Gianni Veloce wrote:
>> Dear * Experts,
>> I intend to use a laptop for Asterisk at home (because
>> of space problems and as I  already have one spare).
>> 
>> I would like Asterisk to 'sit between' my ISDN (BRI)
>> Line and use my existing ISDN telephone as extension.
>> 
>> After the hints from this list I learned that in order
>> to do this I need a ISDN card capable of 'NT mode' for
>> my telephone connection and another one (TE mode is
>> enough) for connecting * to the BRI line.
>> Needless to say that ISDN4Linux support is needed for
>> both.

>That actually depends. There are two ways to archieve NT mode ISDN:
>chan_mISDN and bristuff (i've only dealt with bristuff).

>So no, you don't need ISDN4Linux support, but either mISDN or the
>zaphfc driver from bristuff.

>ISDN4Linux does not do NT mode, neither does chan_modem_i4l.
>chan_capi can't do NT mode either.

>Even tough chan_mISDN (and mISDN in the 2.6 kernel, which is a
>requirement for chan_mISDN) does support NT mode, it still needs the
>hardware to support it, too. The only cards supporting it are the ones
>based on Cologne Chip HFC-S chipset.

>Those are the same cards used for bristuff (which also utilises them on
>2.4, no problems).

>> In my case the question is:
>> What ISDN cards (NT Mode capable) are existing in
>> PCMCIA format (laptop) and where can I buy them?

>I haven't come across any PCMCIA HFC-S cards yet, but they exist.

>Kind regards,
>Martin List-Petersen




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