STANDARD TELEPHONE
2
RINGING SIGNALS
Internal Call:
A single ring every four seconds.
External or Attendant Call:
A double ring at four-second intervals.
SPECIAL SIGNAL TONES (while the telephone is in use)
Camp-on:
A single muted warning tone indicates that a call is
waiting.
Call Waiting:
Two short warning tones during a conversation indicate
that a call is waiting.
Attendant Verification/Executive Override:
A short tone burst (repeated every 15 seconds) is
applied whenever the attendant enters the conversation,
and when a station user enters your conversation by
using the Executive Override feature.
PERCEPTION
e&ex