Sony SPP-IM977 - Manual (Page 46)

46 US Telephone Features
Note
While conversing with an outside caller via the base phone or handset, you
cannot make an intercom call. If you press (INTERCOM), you will hear a busy
tone.
Tips
• You can receive an intercom call on the handset even when “RINGER” is set
to “RINGER OFF”.
• You can receive an intercom call on the base phone even when the L1 or L2
RINGER LEVEL switch on the base phone is set to OFF. The base phone will
ring at a low level.
Receiving a call while using the intercom
When a call comes in, “** RINGING **” appears on the display and
only the base phone rings at a low level.
The LINE 1 or LINE 2 button flashes.
Press (LINE 1) or (LINE 2) whichever is flashing, then you can answer
the call.
Talking between the phones (Intercom) (continued)