Question about Plantronics CS55 Wireless Headset

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Plantronics CS55 requires lifting handset on phone

I can't operate the headset using the call button. When I push the button the the light turns green but the call doesn't answer. The only way to operate the headset is to lift the handset on the phone. This doesn't seem to correct. I thought the point of the call button is to answer the phone without having to lift the handset.
I tried a reset and tried changing the compatibility dial to all 4 settings (1-4) with no luck.

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  • 83 Answers

Please note that your hand receiver has to be off the hook when using the headset.

This is correct, additionally you can use a handset lifter accessory, such as the HL1 or HL10.

Subscribing Headset to Base:

The headset and the base unit are supplied subscribed to each other. However, if you wish to use a replacement headset with the base unit (or if you lose your connection to the base unit), then you must re-subscribe as follows:

1. Return the headset to the charging base.

2. Press and hold both the + and - buttons on the back of the charging base until the red light on the front of the base starts to flash.

3. Let go of both buttons. The red light should continue to flash.

4. Press the mute switch (black wheel on the top of the headset) straight down until a green light appears on the headset, then let go of the wheel, and the light should remain on the headset.

5. Resubscription is finished when the red light on the base is fully illuminated and the green light on the headset disappears.

6. Remove the headset from the charging base lift telephone handset/press headset button if not using a handset lifter. The headset and base should now be connected.

7. If this procedure does not resolve your issue to try a system reset.

Posted on Jul 18, 2009

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1 Answer

Plantronics CS55 Headset


Office was wired that way i have one tried several ways to use it without the lifter did't work had to buy a lifter the next problem is the phone not all will work Cisco uniden will work good

Jun 18, 2014 | Plantronics CS55 Wireless Headset

1 Answer

I HAVE A KX-T7633 AND IM TRYING TOGET MY PLANTRONICS CS55 TO WORK WITHOUT UN-HOOKING THE HAND SET


You can use the cord part number 78333-01. (I have included the link.) This will replace the cord that is plugged in between your CS55 charging base and the handset jack on your phone. It will plug into the base of the CS55 and the round headset jack on your phone. You will not have remote answer. Push the headset button on your phone and then press the headset button on the CS55 headset.

Good luck from Headsets Direct!

May 31, 2011 | Panasonic KX-T7633 Corded Phone

1 Answer

I cannot here the phone ringing from my CS55 headset or another call coming in.


You will need the Plantronics HL10 handset lifter in order to have the CS55 ring, indicating an incoming call. The HL10 also allows you to answer remotely on most phones and hang-up remotely.

Plantronics HL10 Handset Lifter

Good Luck from Headsets Direct!

May 17, 2011 | Plantronics PL-CS55 Wireless Headset

1 Answer

Incoming call alert


You will need the Plantronics HL10 handset lifter in order to have the CS55 ring, indicating an incoming call. The HL10 also allows you to answer remotely on most phones and hang-up remotely.

Plantronics HL10 Handset Lifter

Good Luck from Headsets Direct!

May 17, 2011 | Plantronics CS55 Wireless Headset

2 Answers

Cs55 connects but has no sound on headset


The compatibility setting, in almost 100% of the cases, should be set to "1".  You can find it on the side of the base, it's a little turn wheel that will turn if you stick your thumbnail in it and twist.  I have seen one instance on the Cisco IP phones that requires the compatibility setting to be on 5, so try that as well.
If you have a lifter installed, make sure that the short telephone cable that comes out of the back of the headset's base unit is plugged into the handset port of the telephone (where the handset coily cord is normally plugged into).  You would then plug the handset coily cord into the front of the headset base unit.  Make sure you have that configuration, and try again.
Finally you can try a re-set.  To do this you should lift the headset off of the charging base, make sure the green light on the top of the base is off (the headset is off), and then do the following: 1. Hold down the mute button and the call answer button at the same time. (The mute button is the black little wheel on the top of the headset itself.  If you use the tip of your finger to push that straight in, it will mute the headset) 2.  Keep holding both buttons down until the green light below your thumb on the headset flashes for 2 consecutive series. 3.  Let go.  Wait about 20 seconds then try answering.
If this doesn't work, try a re-subscription: 1. Place the headset back on the charging base. 2. The two microphone volume adjust buttons on the back of the BASE unit should be pressed together.  This will start the red light and the yellow light blinking on the front of the base unit. 3. Hold the mute button down while the headset is still on the charging base.  Hold it down until the red light stops blinking. 4. Disconnect the power to the base so that the red light and yellow light turns off. 5. Plug the power back in after about 5 seconds of it being disconnected and make sure the red light on the front of the charging base is now solid and the yellow light is flashing. 6.  Pick up the headset and try again.

May 07, 2009 | Plantronics CS55 Wireless Headset

1 Answer

PL-CS55 headset lifts receiver but only get buzzing sound in


Try a system reset:
1. Lift the headset off of the charging cradle (the base).  Make sure the headset is turned off.  The green light on the base won't be on if the headset is turned off. 2. Hold down the call answer button on the headset at the same time as mute button.  The mute button is found on the little black wheel on the top of the headset.  Use the tip of your finger to push it straight in. 3. Hold both buttons until you see a green light on the headset flash.  It will be right below your thumb.  Hold both buttons until the green light flashes for a series of 2 flashes.  Then let go of both buttons. 4. Put the headset back on the charging cradle and wait 30 seconds.  Lift it back off and try again. 5. If this doesn't work repeat the process once more or try a resubscription.
Resubscription procedure:
1. Put the headset back onto the charging cradle.  Make sure the red light on the base is on and the yellow light is flashing. 2. On the back of the base there are two buttons for the microphone adjustment that can be pressed down.  Press both of those down until the red light and yellow light on the front of the base start flashing. 3. While the headset is still on the charging cradle press and hold the mute button until the red light on the base goes solid, and the yellow light stays flashing. 4. Unplug the power to the base and then plug it back in. 5. Wait 20 seconds and try.

Apr 22, 2009 | Plantronics PL-CS55 Wireless Headset

1 Answer

Plantronics CS55/HL10 Wireless Office Headset System with Lifter won't lift headset


You may need to re-subscribe the headset.

NOTE: Before re-subscribing the system make sure the IntelliStand switch (on the right side of the charging base) is in the "_" position and NOT the "=" position.

To Re-Subscribe:


The headset and the base unit are supplied subscribed to each other. However, if you wish to use a replacement headset with the base unit (or if you lose your connection to the base unit), then you must re-subscribe as follows:

1. Return the headset to the charging base.

2. Press and hold both the + and - buttons on the back of the charging base until the red light on the front of the base starts to flash.

3. Let go of both buttons. The red light should continue to flash.

4. Press the mute switch (black wheel on the top of the headset) straight down until a green light appears on the headset, then let go of the wheel, and the light should remain on the headset.

5. Resubscription is finished when the red light on the base is fully illuminated and the green light on the headset disappears.

6. Remove the headset from the charging base lift telephone handset/press headset button if not using a handset lifter. The headset and base should now be connected.

7. If this procedure does not resolve your issue to try a system reset.

Jan 12, 2009 | Plantronics CS55/HL10 Wireless Office...

2 Answers

All of a sudden my CS 55 with plantronics stopped working. It shows that its on but the headpiece isnt charing and also doesnt work. Any ideas why?


If the Plantronics CS55 wireless headset shows that it is on, you have to make sure of the following things.

a. the green LED on the base turns on when you turn the call switch on from the headset.
b. the small green LED on the side of the headset is blinking.
c. the telephone headset is lifted from the cradle.
d. if the headset is not charging and the Amber light on the base does not blink when you place wireless headset on it; trying placing the headset more firmly.
e. If the headset is not charging and the Amber light on the base does not blink even after placing the wireless headset firmly on the charging cradle, you may need to change the battery.

Alternately you can try resetting the Plantronics CS55 wireless headset.

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.

Jan 10, 2009 | Plantronics CS55/HL10 Wireless Office...

1 Answer

Plantronics cs55 problem


Turn on the wireless headset as soon as the HL10 lifter picks up the headset. Remember to press the call answer switch. A steady green light should come on the base and the wireless headset should have a small green blinking light on, on its side.

* Make sure your hand receiver is off the hook when using the headset. Also check that you hear a dial tone on the handset/hand receiver before turning on the headset.

Aug 04, 2008 | Plantronics PL-CS55 Wireless Headset

2 Answers

Best Buy: Plantronics Problem


James, plug the phone cord that comes out of the back of the CS55 base into the handset port of the Cisco phone, not the headset port.  Then plug the coily cord from the cisco receiver into the front of the CS55.  Don't use the "Headset" button on your Cisco phone, just lift the receiver off.

Mar 21, 2008 | Plantronics PL-CS55 Wireless Headset

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