1085-500 Push-To-Talk (PTT) Handset

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Mitel Push-To-Talk (PTT) Handset for 5300 Series IP Telephone

Algo Push-to-Talk (PTT) handsets are a high-quality, fully-compatible replacement for the Mitel 5300 series IP telephone. Using original Mitel equipment, this PTT handset provides a reliable and easy-to-use solution for applications where it is important to prevent background noise and conversations from being heard at the far end of a telephone call (in between speaking).

Featuring an ergonomically designed soft-touch button, this PTT handset operates by allowing normal transmission of voice and background sounds to a remote party only when the Talk button is pressed. When the button is released (Normal mode), the handset microphone is disabled, securely muting the transmission of speech and background sounds while still allowing the remote party to be heard.


  • Ergonomically designed soft-touch Talk button operates with just a light finger press
  • Built from original Mitel handsets for maximum compatibility, quality, and reliability
  • Quick and easy installation - simply replace your old handset
  • Quiet, virtually clickless switching between Talk and Normal modes
  • Matches style and audio performance of Mitel 5300 series telephone
  • Fits perfectly into telephone cradle
  • Meets stringent ESD (Electrostatic Discharge) requirements


  • Conference calls where background noise by group participants can be disruptive to the proceedings
  • Security and military applications where transmission of background sounds and conversations can jeopardize security
  • Financial companies, to prevent transmission of sensitive financial discussions and information
  • Quiet monitoring by a supervisor joined into a call
  • Telephone negotiations, where many confidential side conversations take place while a call is in progress


  • Financial trading
  • Banks
  • Dispatch
  • Conference call participants
  • Military and Defense
  • Emergency services

Ordering Guide

Mitel Telephones
Description Color Model Number
5300 Series IP Handset Push-to-Talk Charcoal 1085-500

Mitel PTT Handset for 5300 Series Telephone


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