Allows the call taker to use one headset for both radio and telephone communication.

Can use either four wires or six wire headsets.

Allows connection of second Headset Box giving the PSAP Supervisor the ability to listen to the conversation.

Equipped with two RJ11 connectors with loop current for both short and long-term phone recording and another set of RJ11 connectors for both short and long-term radio recording.

Phone recording outputs are muted when phone system is on-hook for proper VOX operation.

Recording outputs are muted when radio console lines (squelch, channel busy, ptt) are selected via dip switch to ensure proper VOX operation.

Radio console lines (squelch, channel busy, ptt, mic off, receive audio, transmit audio, ground) are electrically isolated from the telephone system using transformers and optical isolation circuits.

Sound card input is provided to play pre-recorded sound files to both the phone and radio systems.

Short-term recording outputs for both phone system and radio console are also provided with proper levels and matching for PC sound card recording.

External connections are provided for call takers headset microphone mute switch and PTT switch.

Headset volume control for both the phone system and radio console.