[asterisk-users] Distinctive Ring for SIP?

[T G]

exten => s,1,Wait(1)
exten => s,n,Set(Var_Alert=${SIP_HEADER(Alert-Info)})
exten => s,n,GotoIf($["${Var_Alert}" = "<http://127.0.0.1/Bellcore-dr3>"]?2,1)
;goto ext 2 if distinctive ring
exten => s,n,Dial(SIP/1)


  ----- Original Message -----
  From: Steve
  To: asterisk-users at lists.digium.com
  Subject: [asterisk-users] Distinctive Ring for SIP?
  Date: Tue, 8 Jul 2008 19:04:31 -0500


  Hello,

  I've done a bit of research, though obviously in the wrong places. :)
  I'm looking to set up some type of distinctive ring for SIP phones
  based
  on the context in which the SIP phone is being called from. If that
  sounds confusing it isn't.

  I have two FXOs connected to POTS, so in essence a caller could be
  dialing us at one of two phone numbers. Each of those FXOs has its
  own
  context in extensions.conf. The contexts essentially grab the
  incoming
  call and ring a bunch of single line SIP phones. If no one answers
  then
  the call is sent to voicemail depending on the number that the caller
  dialed. The problem is that when the SIP phones ring, there's no way
  for us humans to tell which number the caller actually dialed.

  My initial thought was to make some type of distinctive ring to the
  SIP
  phones to indicate which number the caller dialed, much in the same
  way
  that the telco does it when someone has the distintive ring service.

  Another idea would be to set the callerid on the SIP phones to
  indicate
  which line was dialed. The drawback there is that we lose the
  incoming
  callerid from POTS. Maybe set one of line of the callerid to the
  incoming line and leave the other as the callerid number?

  Does anyone have experience with setting distinctive ring in SIP in
  such
  a way?

  Steve

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