Conspec's P911077 Interface to Motorola Surface Radios keeps underground personnel in touch with surface operations at all times. When used with Conspec's Radio Systems, this interface permits communications from the working sections to people outside and on the surface. When personnel talk on the hand-held radios or mobile radios, the squelch control on the surface radio inside the interface is activated and voice communications are carried on the surface radios utilizing existing frequencies.

Standard Interface Unit comes with a Motorola SM-50 Radius Radio and microphone, a 12VDC Lead Acid Battery Back-Up and Antenna. This Interface is connected to the Remote Radio P911063, which is installed underground at least 100 feet away from the Interface to prevent radio signals from interfering with the audio circuits.

Uses a two (2)-conductor cable to connect between the Interface and Remote Radio. The interface requires 120VAC input.