Toshiba PERCEPTION 4000 - Manual (Page 26)

FEATURE INTERACTION
If a station receives a call while engaged in Program Mode, the call will
ring at the called station. The called party can then exit Program Mode
and answer the call.
An electronic telephone that serves as an ACD agent can access
Program Mode when the telephone is logged either on or off, and when
the telephone is in either an Available or Unavailable state.
PERCEPTION 4000 PROGRAM MODE
3-2