gCore POTS shield / weeBell
The gCore POTS shield is an expansion board for gCore. It contains a codec and a ringing Subscriber Line Interface Circuit (SLIC) for 2-line 600-ohm POTS (Plain Old Telephone Service) telephones. With gCore it is used to create weeBell, a personal telephone exchange (technically a Foreign Exchange Service or FXS device). Different firmware running on the gCore allows weeBell to enable use of old school rotary and DTMF telephones with a cellphone via Bluetooth or as a VOIP devices using the SIP protocol or even as a prop or installation controller allowing people to hear and leave recordings via a telephone. The weeBell project is documented on hackaday.io.
The gCore POTS shield, along with pre-programmed gCore boards, can be found on tindie.
The gCore POTS shield, along with pre-programmed gCore boards, can be found on tindie.
Features
- Generates -48VDC line bias
- Generates ring voltages
- Detects off-hook and on-hook conditions
- Supports rotary and DTMF dialing
- Supports audio via 16-bit I2S codec
- Supports Caller ID generation
Applications
- Bluetooth Handsfree telephone service
- SIP-based VOIP telephone service
- Prop and Installation telephone controller
Links
- gCore POTS shield github repository (includes 3D enclosure files)
- weeBell_bluetooth repository - gCore firmware for Bluetooth handsfree
Pre-compiled firmware may be loaded onto gCore using the gCore Serial Loader program. The current firmware version is v1.1.
3D printed enclosure
