Sony SPP-ID970 - Manual (Page 22)

Basics 22 US
Receiving calls (continued)
Note
If another call comes in by “call waiting” service while conversing with an
outside caller, you will hear two short beeps.
Tip
To inform you of an incoming call, the display shows “** RINGING **” when
ringing.
If you have subscribed to the Caller ID service;
• the caller’s number and/or name appears on the display when you receive a
call (see page 31) or when another call comes in by “call waiting” service.
• the ringer sound changes to a higher tone if the call matches the number
stored in the Phone Directory (memory match function; see page 31).