It would help to have the model number of the base ( found on a sticker on the bottom of the base ) and the handset (under the battery) but the following works for many models: Press and hold the "Find Handset" button until the "in use" lamp comes on. Press the "#" key on the handset, then place it on the base... if it is going to work, in a minute or less it will chirp and announce "handset registered". If it shows "registration failed", the base may be "fully populated" and cannot accept another handset: many models are limited to only 5 handsets. To start over by clearing the base registry, press the "Find Handset" button until the "in use" lamp lights, then continue to hold "Find Handset" until "in use" begins to blink. Release, then press again the "Find Handset" button for a moment. The base should chirp, and be ready to register handsets again... try again as above until the maximum is reached. Good luck!
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It would help to have the model number of the base ( found on a sticker on the bottom of the base ) and the handset (under the battery) but the following works for many models: Press and hold the "Find Handset" button until the "in use" lamp comes on. Press the
"#" key on the handset, then place it on the base... if it is going to work, in a minute or less it will chirp and announce "handset registered". If it shows "registration failed", the base may be "fully populated" and cannot accept another handset: many models are limited to only 5 handsets. To start over by clearing the base registry, press the "Find Handset" button until the "in use" lamp
lights, then continue to hold "Find Handset" until "in use" begins to
blink. Release, then press again the "Find Handset" button for a moment. The base should chirp, and be ready to register handsets again... try again as above until the maximum is reached. Good luck!