AT&T Merlin Legend MLX-10 User Manual page 23

Your MLX-10 Telephone
Phones with ICOM Buttons
ICOM Ring. Use this button to make inside ringing calls
and to receive both inside ringing and voice-announced
calls. You cannot use this button for outside calls, but they
can be transferred to you.
ICOM Voice. Use this button to make inside voice-
announced calls and to receive both inside ringing and
voice-announced calls. Voice-announced calls do not
ring—your co-worker hears your voice over the speakerphone
instead. You cannot use this button for outside calls, but
outside calls can be transferred to you.
1-10 Line Buttons