- The interfacing requirements to the two-way radio are also simple, requiring a minimum of 6 connections, namely...
- 10-30V DC power @ 50ma
- Ground
- PTT to the transceiver
- Busy / Mute indication from the Transceiver
- Modem audio to the Transceiver (post pre-emphasis)
- Discriminator audio from the Transceiver (i.e. pre de-emphasis)