TAPI Channel

Support of TAPI 2.0 compatible voice modems and hardware.

Credits:

Copyright (C) 2005-2006 by Patrick DERUEL

Features:
Version: 0.2.0

• Multiple voice modem support
• Auto detection of voice modems
• Full Duplex & Half Duplex mode
• Codec support: Alaw, Ulaw, Signed Linear, Adpcm
• CallerID
• DTMF
• Rx/Tx gains
• Accountcode
• Callgroup support
• earlydisconnect parameter (to disable fake disconnect on tapi)
• CLI command "tapi info" shows status of chan_tapi
• DataFax support (3rd party)

A FULL DUPLEX voice modem is required to use the full capabilities of Asterisk.
However HALF DUPLEX voice modems are supported. You can use it them to build an IVR system or to call an IVR (consulting your bank account or a wheather system)...

Dialing parameters

Dial(TAPI/g<group>/[P|L]<destination>)
Dial(TAPI/modem<modem>/[P|L]<destination>)

'group' can be a value, comma separated list of values or a range using '-'.
The according device found by searching a match with the 'group' specified in the tapi.conf for each device.

/[P|L] : Audio mode for the channel using Half duplex devices:
       /P Playback mode, play voice to the called party
       /L Listening mode, listen the called party
      This parameter can be omitted, the channel default audio mode for outgoings calls is Listening.

Helper applications

• TapiMode(P/L): change channel audio mode for Half Duplex devices.
• Voicemail: the voicemail application has been modified to interact with Half duplex devices.
  No change is needed on dialplan.
• Record: the record application has been modified to interact with Half duplex devices.
  No change is needed on dialplan.

Sending DTMF from softphone to third party

These rules apply to Half Duplex devices only
To send a DTMF or a DTMF chain to the third party: start with (## or **) and end with (## or **)
      To send *456 -> press ##*456##
      To send #456 -> press **#456**
      To send # -> press **#**
      To send * -> press ##*##
      ...