Power Failure Transfer
An installer can connect an industry-standard telephone such as the model 2500 to a
special connection to serve as a power-fail telephone. If an AC power failure occurs, the
system automatically connects the power-fail telephone directly to an outside line. Users
can make normal origination and reception of calls on a power-fail telephone during an
AC power failure. The system will automatically disconnect the power-fail telephone
from the outside line as soon as AC power returns.
Prime Line Automatic
If the programmer uses station class of service programming to enable prime line
automatic at a station, the system will automatically select the designated outside line,
intercom line or line group when the user lifts the handset. A user can pre-empt prime
line pickup by preselecting another line before lifting the handset. If the prime line is
ringing, it is automatically answered when the user lifts the handset.
See also, Line Features.
Privacy
Automatic Privacy
A programmer can make a line private or non-private through programming. In the
private mode, a station has exclusive use of the line during a call. No other station can
access that line unless the user of the private line adds another station through the use of
the add-on conference feature. In the non-private mode, another station with that line
appearance can gain access at the same time (sometimes known as common line pickup).
A line is specified as private or non-private through the line class of service
programming. Through station class of service programming, a programmer can make a
line non-private at a particular station.
See also, Conferencing.
Privacy—Designated Programmable Button
The programmer can arrange for stations to provide a privacy button. If a line is private,
a user can press the privacy button to change it into a non-private one. If the line is
non-private, pressing the button will have no effect. Station class of service programming
is used to program the programmable button function at the stations.
DSU II Digital Telephone System
IMI66–132
Digital Telephone System Features A – 51
Summary of Contents for DSU II
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