Telephone operation
Volume 
control
Options while on calls
Volume control
Press the VOLUME 
keys on the side of the handset to adjust listening volume. Each press of the button increases or decreases the volume.
NOTES:
1.All volume settings (normal handset, speakerphone and headset) are independent.
2.When the volume level has reached the minimum or maximum setting, you will hear two beeps.
Call waiting
If you subscribe to call waiting service with your local telephone service provider, you will hear a beep if someone calls while you are already on a call. Press 
PHONE/FLASH to put your current call on hold and answer the new call. You can press 
PHONE/FLASH at any time to switch back and forth between the calls.
Multiple handset use (not for model TL72108)
If you would like to join an ongoing call, press
PHONE/FLASH or 
SPEAKER on another system handset.
Press 
OFF/CLEAR or place the handset in the telephone base or charger to exit the call. The call will not be terminated until all handsets hang up.
NOTE: A maximum of two handsets can be used at once on an outside (not an intercom) call.
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