Re: flexfax: Direct Inward Dial

[KAbraha454@aol.com]

In a message dated 7/19/99 1:24:45 PM Pacific Daylight Time, jra@baylink.com 
writes:

<< Subj:	 Re: flexfax: Direct Inward Dial
 Date:	7/19/99 1:24:45 PM Pacific Daylight Time
 From:	jra@baylink.com (Jay R. Ashworth)
 Sender:	owner-flexfax@celestial.com
 To:	flexfax@sgi.com
 
 On Mon, Jul 19, 1999 at 11:30:55AM -0400, KAbraha454@aol.com wrote:
 > We emulate DID trunks at work with a Siemens (Rolm) PBX (Software rev 
 > 9006.2). What we have is a T1 which supports 300 DNIS (DID) numbers 
 > (extensions).
 
 Well, DNIS is an INWATS technology, and DID a local trunking one, but
 they're close enough in spirit, if not in implementation.
 
 >               Basically, I assign one or more of these DNIS numbers as a 
 > published FAX number supported by an analog station card (SLMA).
 
 So, you tell the PBX, "when you get a call on a trunk for _this_ DID
 number, route it to this analog station card"?

YES!!
 
 >                                                                   The PBX 
 > programming to do this is a 4 step process. By performing these 4 
programming 
 > steps, the PBX will outpulse the DTMF tones associated with the dialed 
DNIS 
 > number.
 
 The PBX tells the analog port _which_ of a collection of DID numbers
 originated the call?  I've never heard of a PBX that could do that.
YES!!

 
 >          From there, the attached modem on this analog card port would 
pass 
 > along these digits to the fax software, which would then be responsible 
for 
 > routing the fax call to the proper destination. I know this software 
routing 
 > works with Brooktrout modems with Rightfax/Omtool w/MS NT4.0, but I don't 
 > know which hylaFAX supported modems can pass along these DTMF digits and 
 > whether there's destination routing within hylaFAX to control the fax 
 > delivery destination based on the received/passed along DTMF digits.
 
 Ok, assuming I correctly understood what the Rolm is doing, the
 question becomes "can HylaFax somehow capture the DTMF
 [assuming it _is_ DTMF -- the customary thing to send DID as (if it's
 not _dialpulses_) is _MF_; quite another matter]
 addressing and use that to route a fax.
 
 Assuming that it is DTMF, whether the modem can capture it depends on
 when it's sent.  If it's sent _before_ the line is answered, ie. while
 it's still ringing, the modem probably can't hear it.  It's worth
 noting here that on the trunk side, DID trunks sieze in one direction
 at a time, (they're usually 4-wire, as I understand it), for precisely
 this reason.  If it's sent after, it will depend on the modem... but it
 would probably require re-writing the driver front end in faxgetty.

Rolm sends the DNIS as DTFM immediately after the modem answers the call but 
I don't know of any hylaFAX supported modems which can received these DTMF 
digits and then begin receiving the FAX handshakes (CNG tones).
 
 The optimal solution here that I can think of would be if the PBX was
 capable of generating CNID tones; that's the easiest thing for the
 modem to read and HF knows what to do with them... approximately.
 
 > I would be *VERY* interested to know if there are modems for hylaFAX which 
 > would do this (external modems preferred) and if the hylaFAX software had 
 > this routing capability as well.
 
 Roughly, 'good luck'.  :-)
 
 Cheers,
 -- jra
 -- 
 Jay R. Ashworth                                                
jra@baylink.com
 Member of the Technical Staff     Buy copies of The New Hackers Dictionary.
 The Suncoast Freenet            Give them to all your friends.
 Tampa Bay, Florida     http://www.ccil.org/jargon/             +1 813 790 
7592
 
 
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 Date: Mon, 19 Jul 1999 16:08:29 -0400
 From: "Jay R. Ashworth" <jra@baylink.com>
 To: flexfax@sgi.com
 Subject: Re: flexfax: Direct Inward Dial
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