BenQ M315 - Manual (Page 39)

Using Your Phone 27
Making a Second Call*
Enter a phone number, or select one from the phone number or call
record, and then press
to dial it. The currently active call will
automatically be placed on hold. However, if there is already one active
call and another on hold, this action will fail.
Call Waiting*
If there is an incoming call while you are on the phone, a tone will
sound through the earpiece and the display will show that a second call
is currently waiting. You can handle the waiting call and currently active
call in the following ways:
1. Answer the waiting call: Press the currently active call will
automatically be placed on hold. However, if there is already another
call on hold, a menu will appear on the display allowing you to select
a call to end and then answer the waiting call.
2. Reject the waiting call: Press or (End). Pressing
(End) will immediately reject the waiting call; pressing will bring
up a menu on the display that you can use to select a call to end.
In-Call Menu
If you press during a call, it will bring up the call menu. Press
to scroll to the desired item and then press to enter that item; press
(Back) to return to the pervious menu; press to return
directly to the call menu.
Items marked with an asterisk (*) depend on network support and
may require a subscription.