Step 1: Put your phone into registration mode

Locate the page/intercom/find button on your phone’s base unit (this is the bigger unit which is plugged into your phone point).

Push the button and hold it for 3-5 seconds –you may hear a beep or a pulsing sound after doing this (depending on the model of the phone). The phone is now in registration mode and ready to be registered with the headset.

Step 2: Registering the headset

Locate the mute/volume adjust button at the top/back of the Plantronics C351N headset.

Push this button in (as if you were muting the call) and hold it down for around 4-6 seconds.

Your headset is now on registration mode. Please allow up to 1 minute for this to pair up. After this time, your headset and phone should now be registered and you should hear a dialing tone when using the headset.


For incoming calls you would simply need to press the answer button on the headset to answer/end the call.

To make an outbound call using the headset, you need to make the call on your cordless handset and then transfer the call to your headset. Please refer to the manual for this process (this is the same as transferring a call from one handset to another).


* You can find more LiGo quick start guides on our blog or by emailing us.

* Please note the above steps are suggestions and you should always refer to the manuals provided by the manufacturer.