User Guide

Appendix
57
California Energy Commission battery charging
testing instructions
This cordless headset is set up to comply with the energy-conserving standards right
out of the box. These instructions are intended for California Energy Commission (CEC)
compliance testing only. When the CEC battery charging testing mode is activated, all
headset functions, except battery charging, will be disabled.
If you have registered the cordless headset to the TL7910 headset base, below are the
testing instructions.
To activate the CEC battery charging testing mode:
1. Unplug the headset base power adapter from the power outlet. Make sure the
headset is plugged with charged battery before proceeding.
2. Press and hold PAIR on the headset base while powering up the base by plugging
in the adapter.
3. After about 20 seconds, when the MUTE light on the headset base starts flashing,
release PAIR and then press it again within two seconds.
The process takes up to one minute to complete. When the headset
successfully enters the CEC battery charging testing mode, the light flashes
slowly in red and blue.
Note: When the headset fails to enter this mode, repeat all the steps mentioned above.
To deactivate the CEC battery charging testing mode:
1. Unplug the headset base power adapter from the power outlet, then plug it back in.
The headset base is powered up as normal.
2. Register the headset back to the headset base. See page 35 for headset registration
instructions.
If you have registered the cordless headset to a compatible AT&T DECT cordless
telephone, please refer to the respective user's manual for the activation and
deactivation of CEC battery charging testing mode.
If you have registered the cordless headset to a telephone base that does not have CEC
battery charging testing mode, all telephone functions on the cordless headset, except
battery charging, will be disabled.
BC