Headset not working

verify your connection to the Cisco phone and also that the headset port is turned on.

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

Could be a bad hook switch on the phone if you plug a different phone in does it work as it should?

You can use a standard PC or cell phone headsets with Cisco phones. With help of our adapters, you can convert computer headset, smartphone headset or cordless phone hands-free into Cisco compatible headset.
Cisco IP Phones

either the switch is partially shorted or the pin on your headet has a shorted wire in it somewhere..try a new headset first..

I know it may be late (definitely late), but have you defined in the CallManager, that your phone has a "side card"? If CallManager does not know that it has to push an additional firmware to a particular phone, it will not work.

Good luck,

Mike ' CCNP, CCVP, CCSP, CCDP, MCSE, etc.
Headset Adapter Co.
Headset Adapters for office phone system

You can use a Plantronics S11 headset with a Cisco phone, however it is not the best compatible solution. To use an S11 with a Cisco phone, you have to make sure that you are plugging it into the handset receiver jack and not the headset jack. You will need to lift the handset receiver, set it off to the side, and then hang it up after each call. If you want a more compatible solution that you can plug into the actual headset jack and just press the headset button on the telephone to answer and hang up, then you would need one of the Plantronics "H-series headsets" with the Plantronics Cisco direct connect cable ( model 26716-01 ).

Plantronics 26716-01 cable

Plantronics H Series Headsets

Good luck from Headsets Direct!

Do you have the cord into the headset port on your phone?

Is the phone connected to a POW (Power Over Ethernet)Cisco Switch? Check the model number of the switch with the Cisco web site www.cisco.com

Have you check whether there is power available on the switch?
enter "show power inline" at the command prompt.

Does the phone work without the head set?
Does the same thing happen when you plug in the head set on another phone?

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.