HL10/A: No ring notification in the headset
Remote ring detection provides a low tone triple beep in your wireless headset when you receive an incoming call. This feature requires the handset lifter accessory HL10. If you do have a handset lifter accessory but do not hear the remote ring detection, please check the following:
Check the placement of the lifter. Make sure the handset lifter positioned directly over the phone's speaker.
Try adjusting the phone's ringer volume. If the phone's ringer is too quiet, it may not trigger the ring detection built into the lifter. Try turning up the ringer volume of your phone.
Does the phone have different rings? For example internal calls vs external calls vs transferred calls. Does the phone ring the same for each type of these calls. If so try changing so all calls use the same tone.
Attach the optional "external ring detector" cable. This cable plugs into the lifter and provides a small, black microphone. It is included in the plastic bag of lifter accessories. Mount the microphone near your telephone's speaker. Click here for more details.