Walker PTT-K-M-EM-80-RP-00 Push-To-Talk Reverse Polarity Telephone Handset

Walker PTT-K-M-EM-80-RP-00 Push-To-Talk Reverse Polarity Handset

The Walker PTT-K-M-EM-80-RP-00 is a professional-grade push-to-talk (PTT) telephone handset engineered for direct compatibility with two-way radio consoles and systems requiring a reverse polarity control circuit. This specialized unit integrates a momentary PTT switch with a reversed electrical polarity configuration, enabling it to correctly key transmitters in Motorola and other radio systems where the standard PTT ground circuit is inverted. Combined with an 80-foot extended cable, it provides a robust, long-reach interface for operators who need reliable transmitter control in large facilities or complex console setups.

Core Functionality: Reverse Polarity PTT Circuitry and Operation

The defining technical feature of this handset is its reverse polarity (RP) PTT mechanism. In standard handsets, pressing the PTT button typically grounds a circuit to activate the transmitter. In this RP configuration, the circuit logic is inverted; the transmitter is keyed by applying positive voltage or opening a circuit, matching the electrical requirements of specific radio infrastructure.

This ensures seamless integration without requiring external interface adapters or console modifications, providing direct and reliable transmit control for compatible systems. The handset maintains standard, unamplified audio paths for clear reception and transmission through its K-Style microphone.

Design, Extended Reach, and Integration Specifications

Designated with "EM-80," this model features an 80-foot straight cable, offering exceptional installation flexibility for connecting a console position to a remotely located radio base station or amplifier panel. The "K-M" designation confirms the use of a standard K-Style microphone element and a straight cord for permanent installation.

Housed within a durable, industrial-grade casing, the handset is built for longevity in demanding 24/7 operating environments. Its design ensures that both the extended cable and the specialized RP circuitry work in tandem to provide a reliable, plug-and-play interface for the target radio systems.

Target Applications in Radio-Centric Dispatch and Control

The primary application for the PTT-K-M-EM-80-RP-00 is in communication centers built around specific two-way radio architectures, particularly legacy or specialized Motorola systems. It is essential for public safety dispatch, utility company control rooms, transportation coordination centers, and industrial security desks that utilize compatible radio consoles.

This handset solves the interface challenge where standard PTT handsets fail to operate equipment due to polarity mismatches, providing a certified, direct-wired solution that ensures dependable transmitter control over considerable distances.

Find this specialized reverse polarity PTT handset and other radio interface solutions at Find headsets.