Enhanced Backlit DTMF Keypad Microphone

The Motorola PMMN4089A is a genuine enhanced keypad microphone designed to provide push-to-talk communication and convenient dialing controls for compatible Motorola mobile radios.

Its backlit 12-button DTMF keypad allows operators to generate the standard tones used for telephone interconnect systems, access codes and other supported radio functions.

Ideal for commercial fleets, transportation operations and control stations, the PMMN4089A provides added functionality while maintaining a familiar palm-microphone design.

Key Features

• Integrated push-to-talk button

• Backlit 12-button numeric keypad

• Generates standard DTMF tones

• Supports compatible telephone-interconnect functions

• Allows convenient entry of supported access codes

• Keypad remains easier to read in low-light environments

• Designed for select Motorola mobile radios

• Genuine Motorola Solutions accessory

Product Specifications

• Manufacturer: Motorola Solutions

• Model Number: PMMN4089A

• Accessory Type: Enhanced keypad mobile microphone

• Microphone Style: Palm microphone

• Keypad Type: Backlit 12-button DTMF keypad

• Primary Control: Push-to-talk button

• Application: Compatible Motorola mobile radios

• Color: Black

DTMF Keypad Functions

The microphone’s 12-button keypad generates Dual-Tone Multi-Frequency signals—the standard tones commonly associated with telephone dialing.

Depending on the connected radio and system configuration, these tones may be used for:

• Telephone-interconnect dialing

• Entering supported access codes

• Controlling compatible radio-system functions

• Navigating tone-based automated systems

• Sending standard numeric DTMF sequences

Available functions depend on the radio model, programming and communications system.

Backlit Keypad

The keypad illumination improves visibility when operating in:

• Vehicle interiors at night

• Dimly lit equipment cabins

• Control rooms

• Warehouses

• Early-morning or evening fleet operations

The backlight behavior may depend on the connected radio and configuration.

Compatible Radio Models

The PMMN4089A is designed for compatible Motorola mobile radios, including:

• MOTOTRBO XPR 2500

• MOTOTRBO CM200d

• MOTOTRBO CM300d

• Corresponding regional models such as the XiR M3188 and XiR M3688

• Select compatible DM-series mobile radios

Compatibility varies by radio model, connector and region. Confirm compatibility before ordering.

Important Feature Information

The PMMN4089A provides a standard DTMF keypad for dialing and tone-based functions. It should not be confused with an alphanumeric navigation microphone designed for composing text messages or controlling advanced radio menus.

The connected radio system must support and be programmed for the desired DTMF functions.

Package Contents

• One Motorola PMMN4089A enhanced keypad microphone

Mobile radio, microphone hang-up clip and installation hardware are not included unless specifically stated by the seller.

Ideal Applications

• Commercial fleet vehicles

• Transportation and logistics

• Utility and service vehicles

• Telephone-interconnect radio systems

• Dispatch operations

• Control stations

• Security operations

• Low-light mobile work environments

Operators should avoid dialing or using keypad functions while driving unless it can be done safely and legally.

Why Buy from Delmarva Communications?

Delmarva Communications provides genuine communications equipment backed by more than 20 years of industry experience. Our team can help confirm radio compatibility and determine whether your communications system supports the microphone’s keypad functions.