To answer a waiting Line Interface Module call, or to return to the original Line Interface Module call, do one of the following:
zPress and release the hookswitch.
zPress 
( CANCEL ).
zPress the Line Interface Module key.
Hold a Call
To put a current call on hold to answer an incoming Line Interface Module call:
zPress the flashing Line Interface Module key. The current call is put on hold.
To switch between the current call and the held call when one of the calls is using the Line Interface Module line, do one of the following:
zIf your current call is using the Line Interface Module line, press the flashing Line key of the held call. The Line Interface Module call is automatically put on hold.
zIf your current call is using an IP line, press the flashing Line Interface Module key. The IP line is automatically put on hold.
End a Call
To end a current call when an incoming Line Interface Module call arrives:
zPress 
(CANCEL), and then press the flashing Line Interface Module key. The current call ends, and you are connected to the caller on the Line Interface Module line.
To end the current Line Interface Module call when an incoming call arrives:
zPress 
(CANCEL). The current Line Interface Module call ends, and you are connected to the new caller.