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What can the Male 2.5mm to Male RJ9 Adapter Cord Work With?

PLT Executive Pro male 2.5mm to male RJ9 connector cord

The male 2.5mm to male RJ9 adapter cord connects corded or wireless headset systems that have an RJ9 output jack (like the M22 (DISCONTINUED), S12 (DISCONTINUED), GN8000MPA (DISCONTINUED), Sennheiser Corded Headset Amplifier, UI760 (DISCONTINUED) and Executive Pro systems) to corded phones via a 2.5mm headset jack.

Note: It will not work with the Sennheiser OfficeRunner


Common corded phones with 2.5 mm jacks

This is a very incomplete list. There are many other phone models with these jacks. If you have questions about compatibility, give us a call at 1-800-HEADSETS (432-3738)!

  • AT&T 955 Panasonic KXTS-3282
  • AT&T 964 Panasonic KXTS-500
  • AT&T 974 Panasonic KX-T105
  • AT&T 992 Panasonic KX-TS108
  • RCA Executive Series Panasonic KX-TS620
  • Panasonic KX-TS208

Connecting the M22 to your phone’s 2.5mm jack

The male RJ9 jack plugs into your headset amplifier via the jack designated by the diagram of the entire telephone set (both the phone base and handheld receiver – or the abbreviation “TEL” on Executive Pro systems). The male 2.5mm jack plugs into your telephone into the 2.5mm headset jack.

This connector allows the use of amplified headset systems for additional sound control and lets the user keep their phone on the hook while using a headset. This does not work for cell phones with a 2.5mm headset jack. We also would not recommend this connector for cordless phones at this time.

Hi, I'm Kyle!

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Kyle Newgent wearing a Leitner office headset

Kyle Newgent
Headset Blogger