AT&T E5938B, E5939B user manual Replacing a handset, To de-register all handsets

Appendix

Replacing a handset

If you are replacing a handset on a system that has the maximum number of registered handsets (four) or wish to change the assigned handset number of your registered handsets, you must first de-register the handsets, then re-regis- ter all handsets again.

To de-register all handsets

•Press and hold HANDSET LOCATOR /INTERCOM on the main telephone base until the IN USE light starts to turn on and flash (about 10 seconds), then release the HANDSET LOCATOR /INTERCOM button.

•Press and release HANDSET LOCATOR /INTERCOM again. The IN USE light will turn off and in a few seconds, all handsets will be de-registered.

•All handsets will show NOT REGISTERED if de-registration was successful.

NOT REGISTERED

NOTES:

1.If the de-registration process was not successful, you may need to reset the system and try again. To reset: pick up the handset and press the PHONE FLASH button, then press the OFF CLEAR button and place the handset back into the cradle.

2.You can only de-register handsets when the handsets and the base are not being used.

3 To re-register the handset to the telephone base, follow the registration instructions on page 44.

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