[asterisk-users] Does Asterisk support DNIS?

[Ron Fox]

On Sun, 18 Feb 2007, Matt wrote:

> Why would the card care?  This would be something you'd take care of in your
> dialplan.

Right, the card wouldn't care.  So does Asterisk know about how to send 
and receive delimited ANI and DNIS through a channelized voice T1?

--Ron
> 
> 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