Instruction manual

Telephony
555-233-767206 Issue 4 May 2003
Abbreviated dialing on-hook programming
On-hook programming allows users of the 2420 DCP telephone, as well as the
4600-series, 6400-series, and 8400-series telephone sets with enabled speakers, to
access the programming mode without going off-hook during available call
appearances. Signaling changes from DTMF to the S-channel, allowing the use of
a longer (60 seconds) time-out period. Signaling will remain DTMF and the
current time-out period of 10 seconds will still apply to non-display telephone
sets.
Active dialing
6400-series and 4600-series telephone sets have a dialing option where the set will
send S-channel button codes when the user presses a number on the dial pad when
on-hook.
Administrable timeout on call timer
Enhances the call timer feature on the 6400-series telephones. The call timer
feature measures the duration of a call, starting a timer when the call is answered
and stopping the timer when the call is dropped.
Previously, the call timer feature displayed the duration of the call for only five
seconds after the call was dropped. The administrable timeout on call timer
feature allows the user to specify how long to display the duration of the call.
Alphanumeric dialing
See ‘‘Alphanumeric dialing’’ on page 91.
Automatic Call Back (ACB)
Automatic Call Back (ACB) allows internal users who placed a call to a busy or
unanswered internal telephone to be called back automatically when the called
telephone becomes available.
When a user activates automatic callback, the system monitors the called
telephone. When the called telephone becomes available to receive a call, the
system originates the automatic callback call. The originating party receives
priority ringing. The calling party then lifts the handset and the called party
receives the same ringing provided on the original call.