[asterisk-dev] Change RX Signalling Bits in Dahdi drivers

[Shaun Ruffell]

On Thu, Mar 07, 2013 at 05:45:58PM -0500, Optical Phoenix wrote:
> 
> Hello, and thank you. You are quite correct, it is a C
> programming question. Apologies if that is a faux pas.

No worries. There just may be better avenues for asking /
learning those types of questions specifically than the
asterisk-dev mailing list.

> I guess the DAHDI question is "How would I create a PLAR
> signalling type in DAHDI" but I imagine that's asking a
> little much.

While I can't tell you exactly how to add PLAR signaling, I
can tell you you're on the right track. Although I am curious
about how you're setting it up.

1) If you just want to be able to have "hot-lines" that
connect stations without dialing, you might not even need to
add a new signaling type. Check out the 'immediate' option in
chan_dahdi which could be used to configure an extension to
automatically ring a group of extensions as opposed to
providing dial-tone and reading digits.

2) If you *really* do need PLAR specific signaling because
you're connecting to another system that implements this, are
you using a channel bank and digital lines or an analog
interface card?   The analog interface cards handle the
signaling a little differently than the digital cards.

So basically, could you provide a little more information
about what end result you're trying to achieve and why? The
list may be able to provide more specific advice.
 
> I am going through the code trying to understand the
> structure, learning c along the way. I would eventually like
> to be able to add a signalling type. Is it alright to post
> programming questions that have to do with the Dahdi code
> base?

I think it's OK in moderation. Just keep in mind that most
people on the list are rather busy.. But I always think it's
cool when someone is trying to make Asterisk / DAHDI do
something new.

Cheers,
Shaun

-- 
Shaun Ruffell
Digium, Inc. | Linux Kernel Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: www.digium.com & www.asterisk.org