Guide to CS50/55 Switches: Compatibility and Volume

Updated by Hayden Everly on Aug 9, 2024

Plantronics CS50 and CS55 button map

Please note: The CS50 and CS55 have been discontinued for a number of years. We are no longer able to get replacement parts for this headset!

There are several switches on the CS50. Here is a brief description of what each one does

  1. 1-2-3-4 Screw: located on the left hand side of the base station. This is a compatibility switch, similar to the 1-6 switch on the M12 / M22 / Vista
    Most phones work on # 1
    some Merlin work on # 2 or #3*
    some Cisco work on # 3 or # 4

  1. A-B-C-D Switch: located on the bottom of the base station. This is the Master Microphone Volume Control. A is the weakest, D is the strongest. Most phones sound best on

  1. 1-2-3-4 Switch: located on the back of base station. This is the Master Listening Volume. 4 is the lowest, 1 is the loudest

  1. + Arrow and - Arrow: located on the back of the base station. This is the Fine Tune Microphone Volume Control

  1. Two position - and = switch (Intellistand) aka “Auto On”: located on the right hand side of the base station
    Auto On disabled: If it is set to - (one dash), we need to hit on/off button on headset
    Auto on enabled: If it is set to = (two dashes), headset will turn on as soon as we take it off the base

  1. Black Mute/Volume button: located on the back of the headset. If you roll this button from side to side it controls the listening volume. If you press the button straight into the headset and quickly release it mutes the microphone (and if you press and release it again, it unmutes the microphone).

*Sprint Protégée SP702 and 705 sometimes will work best on #2 on a CS50



Time for a new headset?

Many Plantronics CS50 users have switched to the Leitner LH570!

What is Headset Answers?

This is the internal support database for Headsets.com. We manufacture and sell office headsets in North America. With over 25 years' experience in the business, we know headsets.

Please use our support database for free headset support, whether you’re a Customer of ours (or not). If you have problems, suggestions, or unanswered questions, please email us at hello@headsets.com (compliments also welcomed 😀)

Looking for office headsets in the UK? Check out Headsets.co.uk.

Leitner LH470 Wireless Dongle Headset
Leitner Headsets logo

Ready for a better headset?

What is Headset Answers?

This is the internal support database for Headsets.com. We manufacture and sell office headsets in North America. With over 25 years' experience in the business, we know headsets.

Please use our support database for free headset support, whether you’re a Customer of ours (or not). If you have problems, suggestions, or unanswered questions, please email us at hello@headsets.com (compliments also welcomed 😀)

Looking for office headsets in the UK? Check out Headsets.co.uk.

Questions/comments?