DIY

When working with these PBX-systems, a complete new world has opened. The possibilities are endless, but there are also some practical limitations.

• The system should work with the already existing PSTN
• The available DECT-telephones must be used.
• Costs should be low.
• Nothing must change for the enduser in order to make a normal call, or to receive one.
• Calling must still be possible when the server or internet is offline.

Setup with Voice-modem

• A $10 Linux Answering machine - An Asterisk PBX system using an Intel voice-modem.

Possible problems

• Will the connection between the line- and phone-jack be made when the server is offline?
• Is it possible to make the (DECT-)phones ring when someone is calling you via the PBX?
  • If not, what is needed (60V power-supply?) to make it work?