 | Phone patch for use with 7-line
or most other transceiver or receiver/transmitter combinations. |
 | Hybrid design nulls receiver audio at transmitter output to allow
automatic VOX operation if desired. |
 | Adjustable receiver and transmitter audio gain controls. |
 | Built-in relay for positive receiver muting during transmit. |
 | Provision for addition of holding coil for use in remote control
applications such as repeater auto patches. |