# extensions.conf

The following contexts are recommended.

-     ; Mobile Terminated, RX. This is used when an incoming call from the SMS arrive
      s, with the queue (called number and sub address) in ${EXTEN}
      ; Running an app after receipt of the text allows the app to find all messages
      in the queue and handle them, e.g. email them.
      ; The app may be something like   smsq --process=somecommand --queue=${EXTEN}
      to run a command for each received message
      ; See below for usage
      [smsmtrx]
      exten = _X.,1, SMS(${EXTEN},a)
      exten = _X.,2,System("someapptohandleincomingsms ${EXTEN}")
      exten = _X.,3,Hangup
      ; Mobile originated, RX. This is receiving a message from a device, e.g.
      ; a Magic Messenger on a sip extension
      ; Running an app after receipt of the text allows the app to find all messages
      ; in the queue and handle then, e.g. sending them to the public SMSC
      ; The app may be something like   smsq --process=somecommand --queue=${EXTEN}
      ; to run a command for each received message
      ; See below for example usage
      [smsmorx]
      exten = _X.,1, SMS(${EXTEN},sa)
      exten = _X.,2,System("someapptohandlelocalsms ${EXTEN}")
      exten = _X.,3,Hangup

smsmtrx is normally accessed by an incoming call from the SMSC. In the UK this call is from a CLI of 080058752X0 where X is the sub address. As such a typical usage in the extensions.conf at the point of handling an incoming call is:

-     exten = _X./8005875290,1,Goto(smsmtrx,${EXTEN},1)
      exten = _X./_80058752[0-8]0,1,Goto(smsmtrx,${EXTEN}-${CALLERID(num):8:1},1)

Alternatively, if you have the correct national prefix on incoming CLI, e.g. using dahdi_hfc, you might use:

-     exten = _X./08005875290,1,Goto(smsmtrx,${EXTEN},1)
      exten = _X./_080058752[0-8]0,1,Goto(smsmtrx,${EXTEN}-${CALLERID(num):9:1},1)

smsmorx is normally accessed by a call from a local sip device connected to a Magic Messenger. It could however by that you are operating Asterisk as a message centre for calls from outside. Either way, you look at the called number and goto smsmorx. In the UK, the SMSC number that would be dialed is 1709400X where X is the caller sub address. As such typical usage in extension.config at the point of handling a call from a sip phone is:

-     exten = 17094009,1,Goto(smsmorx,${CALLERID(num)},1)
      exten = _1709400[0-8],1,Goto(smsmorx,${CALLERID(num)}-{EXTEN:7:1},1)