[Asterisk-Users] Can I use Asterisk for a modified Hoot andHoller?

[Steve Totaro]

Just stick a couple granstream ATAs on each side.  They have this option
built in.


----- Original Message ----- 
From: "Race Vanderdecken" <asteriskusers at codetyrant.com>
To: "'Asterisk Users Mailing List - Non-Commercial Discussion'"
<asterisk-users at lists.digium.com>
Sent: Monday, April 18, 2005 1:34 PM
Subject: RE: [Asterisk-Users] Can I use Asterisk for a modified Hoot
andHoller?


> Hmmm,
>
> Hoot and Holler, hoot-n-holler, ARD: Automatic Ring Down, Hot
> line and Private Line Automated Ringdown (PLAR)
>
> You should think about VoIP via Asterisk.
>
> Here is a quick search result on it
> http://lists.digium.com/pipermail/asterisk-users/2003-March/008936.html
>
> But not much else.
>
>  I am looking at pre-dial on the cisco 7960 or the snom 200's I have.
>
> This might be a good thing to add to sip. Just need to get the phone to
> ping Asterisk when it goes off hook. A few changes to the sip C code to
> make it dial an extension/context.
>
> If someone knows how to get a voip phone to pre-dail then the SIP
> changes are not that hard.
>
> Race "The Tyrant" Vanderdecken
>
> Looking at this issue I stole/lifted this from a hoot-n-holler company.
>
> "An Auto-Ring Down is a leased voice circuit that connects two single
> endpoints together. When either telephone handset is taken off-hook, the
> remote telephone automatically rings. This application is used most
> frequently for brokerage firms, banks, Wall Street firms and
> applications that require immediate verbal responses. Since ARDs and
> Hoot'n'Hollers are popular with Wall Street and Recycling Companies,
> (name of company removed here) has specialized in both types of
> circuits.
>
> This type of voice-grade analog circuit is considered a specialty
> circuit in that the Bell codes for signaling on both ends are not coded
> the same on each side, as are most other types of circuits. This is
> called a 2-state signaling scheme, based upon the use of the "A-Bit".
> Like many other voice-grade analog circuits, it can be ordered either as
> a 2 or 4 wire connection based on the requirement of the customer's
> terminating equipment. If any of the segments of the tail circuits into
> the customer's premise are in excess of 6 miles, the circuit should be
> ordered up as a 4 wire. This is followed with a hybrid station pack at
> the customer site to break it back down to 2 wires for their equipment."
>
>
> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Rich
> Adamson
> Sent: Monday, April 18, 2005 1:12 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] Can I use Asterisk for a modified Hoot
> andHoller?
>
> > Hello wonderful asterisk users list.
> >
> > I have some energy traders that are currently using 2 wire
> > hoot-n-hollers (squawk box, always open direct line) to different
> > trading floors throughout the country.  Each "box" has one
> hoot-n-holler
> > line.  I would like to make these boxes IP based by connecting the 4
> > lines to a TDM400 with 4 fxo modules, providing SIP or IAX extensions
> > for each hoot line and giving my clients a softclient on their
> desktop.
> > Will it work?  Is it reliable?  Is it the best way?
>
> The probability of making that work with a TDM card is rather low.
>
> The primary reason is the TDM card (and drivers) are oriented around
> ringing come in, some action performed (eg, dialplan), and aswering
> the call. Hoot-n-holler circuits don't have those same functions.
>
> In most cases that I'm familiar with, the actual circuit used for
> these is four-wire (not 2-wire) and the TDM does not have a four-wire
> interface.
>
> Could someone modify the drivers to do that? High probability, but
> that isn't going to be an easy task for the uninitiated.
>
>
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