Headset button doesn't work - Nortel IP Phone 1140E NTYS05

CS70 headset does not come on:

If the CS70 base has lights, to show that it is getting electrical power, you may need to re-pair the headset to the base unit (the headset will usually just beep when you press the button). Here is the link for subscription or how to re-pair the headset and base.

http://www.headsetsdirect.com/plantronics-cs70n-subscription-pairing-instructions

If the headset doesn't beep or anything when the button is pressed, and the base has lights, it could be that the internal battery has worn out and the headset needs to be replaced. The CS70 is an older model that has been discontinued for a few years, however you can get the CS70N replacement headset which will work on your base.

http://www.headsetsdirect.com/72910-01-cs70n-headset.html

just hold the power button of blutooth for 10 sec and reset and re pair again

what i gather from what you have said is that the headset doesn't ring at all. this would indicate to me that the headset is not paired with the base.
normally when pairing devices the base station will look for the device but at the same time you will have to hold the headset power button for at least 5 seconds for that the other device can capture the signal.
i will look into this for you but try this method if applicable but the bluetooth devices do have to be paired in order to work.

it is likely the phone is in headset mode. If you've got a headset button programmed, then it should be lit.... if so, press it and it should work for you.

If you don't, you might be able to use the blue superkey to either turn off headset mode or set a button.
Press the Blue superkey, Press an unused button in the two rows of buttons. Press the "Change Key" softkey (under the display). Press No until you see headset key... press Yes.
Press the superkey again to get out of the programming.
Now that you've got the key programmed for headset, press it, if it's lit, press it again. Test your speakerphone.
If this doesn't work, I believe you would have a defective phone and should report it to your system admin or telephone system vendor for repair/replace.

Sincerely,
Mark

Verify there is nothing plugged into the headset port, including headsets, headphones, or adapters.
Original iPhone only: While on the Home screen, adjust the volume buttons. If you see the icon below, indicating that headphones are attached, there may be debris in the headset port:



To remove debris in the headset port, try connecting a pair of headphones to the headset port and then remove the headphones. Repeat this several times.
If you have paired with a Bluetooth headset that is nearby, either use the headset or turn Bluetooth off (choose Settings > General > Bluetooth).
If that doesn't work, try restarting the iPhone. Hold the Sleep/Wake button until "slide to power off" appears. Slide to power off your device. When it is off, press the Sleep/Wake button to turn it back on.
If restarting the iPhone doesn't resolve the issue, try restoring the device.

There are two possible solutions to this issue:

1. The headset needs to be reset.
2. The headset is defective and should be replaced.

To reset the headset, use a straightened paperclip to push the reset button on the inside of the headset, below the earhook. See the pic:




You may need to hold the reset button for a few seconds. Then replace the headset into the cradle. You should see normal behavior again.

If this doesn't work. you will need to replace the headset.

On the Blackberry, Go to Options, Bluetooth. Select the blackberry button, Add Device, and search. If search doesn work, try listen. While these are going conduct the following on the Headset:


Close theheadset. Go to the phone and choose discover, or search. Open the headset and pressand hold the big button. It should then turn purple and should be recognized.

Also make sure the battery on theheadset is charged before doing this.


If this doesnt work: Start the search onthe phone, Keep the boom of the mic closed when you press and hold the buttonon the h700. the light should turn purple. After this, open the boom

On the Blackberry, Go to Options, Bluetooth. Select the blackberry button, Add Device, and search. If search doesn work, try listen. While these are going conduct the following on the Headset:

Close theheadset. Go to the phone and choose discover, or search. Open the headset and pressand hold the big button. It should then turn purple and should be recognized.

Also make sure the battery on theheadset is charged before doing this.

If this doesnt work: Start the search onthe phone, Keep the boom of the mic closed when you press and hold the buttonon the h700. the light should turn purple. After this, open the boom
The passkey is 0000, four zeros.

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.

If the button is "detached" as you say then its broken. If the headset is still under warrentee you can get a new one if not you'll need to buy one. Not fixable.