[asterisk-users] Does Asterisk support DNIS?

[Ron Fox]

On Sun, 18 Feb 2007, Matt wrote:

> BTW.  This seems kinda backwards.  Why not just get a PRI.  PRIs have all
> the intelligence you need to do it right.

You may not have that option.  For example, you want to split a T1 from a 
legacy PBX to 12 channels to a proprietary IVR system and 12 channels to 
an Asterisk box.  Can't do that with with PRI and a single T1 because you 
only have one control channel.

--Ron
> 
> On 2/18/07, Matt <mhoppes at gmail.com> wrote:
> >
> > Why would the card care?  This would be something you'd take care of in
> > your dialplan.
> >
> > On 2/18/07, Ron Fox <rfox at dlabs.com > wrote:
> > >
> > > Arriving late to this discussion, sorry if this has already been
> > > mentioned
> > > but DNIS and ANI can be variable length without confusion if the sender
> > > uses the "*" DTMF tone as a delimiter. Thus sending *ANI*DNIS*
> > > (pronounced
> > > "Star ANI Star DNIS Star" allows the receiver to identify the two values
> > >
> > > unambiguously and to find the trailing boundary (when the 3rd "*" has
> > > been
> > > received).
> > >
> > > We have a Channelized Voice T1 from a long distance provider that is set
> > > up this way into our non-Asterisk PBX where the provider sends us ANI as
> > >
> > > the full originating phone number and DNIS as the "last 4 digits".  So
> > > the
> > > DTMF string seen by our PBX for someone calling one of our toll-free
> > > numbers, say 800-123-4567, from a local phone in Hawaii, say
> > > 808-555-1313,
> > > would be "*8085551313*4567*".  The PBX parses this string and uses the
> > > last 4 digits DNIS to route the call from the T1 trunk group to the
> > > proper
> > > internal extension or hunt group.
> > >
> > > Do Asterisk and Digium or Sangoma T1/E1 cards know about delimited ANI
> > > and
> > > DNIS?
> > >
> > > --Ron
> > >
> > > On Sun, 18 Feb 2007, Eric "ManxPower" Wieling wrote:
> > >
> > > > It will do so automatically if it is working.  Asterisk will stuff
> > > those
> > > > digits into ${EXTEN}, therefore you need an exten => _XXX,1,Whatever
> > > if
> > > > you are expecting 3 digits.
> > > >
> > > > Until recently we had DID service from our telco on an E&M Wink
> > > > channelized voice T-1.  The above is what we did.
> > > >
> > > > David Ruggles wrote:
> > > > > Yuan (and Matt),
> > > > >
> > > > > Thanks for the reply, I'm sorry I kind of vented, I just got very
> > > frustrated
> > > > > with trying to configure Asterisk for what (in a proprietary PBX) is
> > > > > normally one of the easiest parts of configuration.
> > > > >
> > > > > With a wink start T1 the DNIS digits are transmitted in-band. The
> > > Network
> > > > > goes off hook, the PBX winks (goes off hook for 200ms) and then the
> > > network
> > > > > sends DNIS (and ANI if used) as DTMF tones, after the PBX gets the
> > > tones it
> > > > > answers the call (goes off hook). So you would tell the PBX to look
> > > for x
> > > > > number of digits and then after getting that number of digits it
> > > will answer
> > > > > the call. I have the Sangoma A101 configured for wink start, but I
> > > can't
> > > > > find anything that says how to specify the number DNIS digits to
> > > expect. If
> > > > > the PBX answers the call instead of just winking, the DTMF tones
> > > will be
> > > > > transmitted during the call which is what seems to be happening
> > > here.
> > > > >
> > > > > For more specific information a good overview of the wink start
> > > process can
> > > > > be found here:
> > > > >
> > > http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a0080
> > > > > 1123bb.shtml#topic2a
> > > > >
> > > > >
> > > > > Can anyone tell me how to configure Asterisk to pickup the DNIS
> > > digits off a
> > > > > wink start T1?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > David Ruggles
> > > > > CCNA MCSE (NT) CNA A+
> > > > > Network Engineer    Safe Data, Inc.
> > > > > (910) 285-7200       david at safedatausa.com
> > > > >
> > > > >
> > > > >
> > > > > -----Original Message-----
> > > > > From: asterisk-users-bounces at lists.digium.com
> > > > > [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Yuan
> > > LIU
> > > > > Sent: Friday, February 16, 2007 5:57 PM
> > > > > To: asterisk-users at lists.digium.com
> > > > > Subject: RE: [asterisk-users] Does Asterisk support DNIS?
> > > > >
> > > > > Matt already replied to your other posting of similar content.  I'm
> > > also a
> > > > > bit confused.  Do you mean you have observed that Asterisk is
> > > brought into
> > > > > the intended context, but start to react to digits in DNIS one after
> > > > > another?  If so, can you estimate the interval Asterisk stays in
> > > each
> > > > > extension?
> > > > >
> > > > > If this is true, it seems to suggest that your provider is sending
> > > DNIS as a
> > > > >
> > > > > DTMF string after Asterisk has answered the call.  Isn't this a bit
> > > weird?
> > > > > What does the card's manual say about DNIS (with wink start)?
> > > > >
> > > > > Yuan Liu