Question about Plantronics CS70 Wireless Headset

1 Answer

Headset has static

Plantronics model CS50 worked fine yesterday. nothing has changed since then, and today i pick it up and get static when i have a dial-tone. i swapped out phone cords, tested the alternate jack on the phone, even plugged the handset into the headset jack to cross-check. handset worked fine. the headset functions correctly until i get a dial-tone. dial tone is nearly drowned out with static.

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  • JCooper Dec 19, 2008

    Same thing here, with a CS70. Also lifter works fine to pick up the phone (but the static is deafening), but when the earpiece button is pressed to hang up the phone it does cut the connection but doesn't drop the handset.

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  • 32 Answers

Perform a reset on the headset.  Hold down the mute button (the dial on the back of the headset needs to be pushed straight in), and at the same time hold down the call answer button until you see the green light on the headset blink a few times.  Release both the mute button and the call answer button.  See if it works now.  If it doesn't, try a re-subscription (should be available in the manual).

Posted on Apr 28, 2009

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Problem for Plantronics CS50 Wireless Headset - I can hear the person on the other end when the configuration dial is set to 1,2 or 3. But th other person cannot hear me. When I set the dial to 4, others...


The following is a cut from Plantronics web site. I hope it helps, It's just possible you have missed a setting, such as the mute switch.

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There are also configuration settings on the left hand side of the base. This is a dark grey dial with a 1234 on it. There are notches to the right of this dial. Whatever number is lined up with the notches it what setting you are on.
This needs to be set to the clearest setting.

There is a silver button on the headset itself which is your “Talk button”. This is what you press to use the headset and or transfer the call from the headset back to the hand receiver.

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Plantronics cs50 head set with lifter has STATIC


Try a system reset:
1.  Lift the headset off of the charging cradle, but make sure the headset is turned off.  It will be off if the green light on the front of the base is not lit.  If it's not, push the call answer button once to turn it off.
2.  Push the call answer button and the mute button at the same time and hold them down.  The mute button is the black little wheel at the top of the headset.  Use the tip of your finger to push it straight down and hold it while holding the call answer button.  A green light on the headset will flash for 2 series of flashes.  Wait until the end of the second series then let go of both buttons.
3.  Put the headset back on the charging cradle and wait 30 seconds.  Lift it back up and try to use it.  If this doesn't work, repeat one more time and then disconnect the power from the base and plug it back in.

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Reset Plantronics CS50, CS60 or CS55 Wireless Headset

If you have problems with the sound or connection of your Plantronics CS50, CS60 or CS55 wireless phone headset, you may want to try to hard reset it using the following steps:

Note: Ensure the IntelliStand switch (on the right side of the charging base) is in the - position and NOT the = position.

1. Press both the call control button and the listening volume/mute button for 5 seconds. When the indicator light blinks release both buttons.

2. Press the call control button again. The talk indicator light will again blink to indicate the headset is back to normal.

3. Disconnect the AC charger from the AC charging jack for 5 seconds.

4. Reconnect the AC charger.

Now give the Plantronics headset a try.

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