Lucent Technologies INDeX 20AT User Manual page 9

Telephone Tones & Ringing
Night Service
38DHB0002UKDU - Issue 1 February 2000
The INDeX 20AT uses various tones and ringing to
indicate calls and other events.
Incoming Calls:
– Repeated Double Ring: External call.
– Repeated Single Ring: Internal call.
During Calls:
– Repeated Single Pip: Another extension is about to
intrude or has intruded on your call.
Outgoing Calls:
– Continuous Tone: Number called unobtainable or set
to no calls. Phone locked, no external calls (or phone is
barred).
– Repeated Tone: Busy number.
– Dial Tone: Dial number.
– Repeated Single Pip: Phone on divert or no calls.
The system can take different areas into and out of night
service automatically. It does this following timetables
setup by the System Manager. The effects of night service
vary, but typically they are as follows:
– Lines: The system directs calls to a night desk number
or answer phone extension.
– Phones: The type of calls you can make becomes
more restricted, eg. no international or long distance
calls.
Telephone Tones & Ringing – Page 9
INDeX 20AT Telephone User's Guide