Telex BP-325 Dual-Channel Binaural Programmable Beltpack

The BP-325 is a dual-channel binaural beltpack for RTS two-wire (party-line) systems. Binaural operation feeds channel one to one ear and channel two to the other, so a user working two conversations at once can tell them apart instantly. Independent talk, listen, and volume controls for each channel, a call light, and a sidetone control that sets how much of the user's own voice returns to the headphones make it a programmable station rather than a simple pack.

It drives either a mono or a stereo headset and adds a separate connector for a monaural carbon-mic headset; the beltpack is built for dynamic microphones only. Three-pin XLR connectors loop the party line through the pack, the mono headset output is a 4-pin female and the stereo output a 5-pin female, and the unit draws its power from the intercom system supply on channel one. It is offered in black and gray.