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STRATA DK
GENERAL DESCRIPTION
DECEMBER 1990
lines in another pool, etc.
*---Outgoing pooled line buttons override sys-
tem LCR, and cannot be used to set up
tandem CO calls.
l Pooled line buttons can be used to set up
two-CO line conference calls with one or
two stations.
Power Failure Transfer: Up to eight CO lines
are switched directly to up to eight dedicated
conventional telephones (customer-provided
2500- or 500-type) for incoming and outgoing
calls. This feature requires an external unit,
the power failure transfer unit (DPFT). A stan-
dard telephone interface unit (PSTU) is
required to supply the DPFT with a -24VDC
control signal and ground connections.
Privacy/Non-privacy: The system can be pro-
grammed to be totally private or non-private,
or any combination of private/non-private on a
station-by-station basis. The system is in pri-
vate mode by default, meaning that station
users, by pressing the CO line button, cannot
access a CO line that is in-use by another sta-
tion. Station users, however, can change their
individual station’s mode via the privacy
release button. Users having stations with
common CO line appearances can access a
CO line that is currently in use by a non-pri-
vate user. Up to three stations may converse
on a single CO line via non-private operation.
See Station Features, Privacy Release Button
and Privacy Override.
NOTES:
1. In private systems (default), all stations
are denied Privacy Override.
2. In nonprivate systems, all stations are
allowed Privacy Override.
Relay Service: Two relays provide signals to
activate optional external equipment. Each
relay can be optionally configured to be nor-
mally open or normally closed. Each relay can
be programmed to perform one function only.
Relays and their optional functions are as fol-
lows:
l External Page/Door Lock
Relay: This
relay can be programmed to activate one
of the following functions:
.
l External Page: An external music
source can be connected to the system
to provide background music over exter-
nal speakers. When a paging announce-
ment is made over the external speak-
ers, the external page relay mutes the
background music.
l Door Lock Control: This relay controls
an electronic door lock. When the sta-
tion door lock button is pressed, the
door is unlocked by the relay for either 3
or 6 seconds as specified in program-
ming.
l Night/Hold Relay: This relay can be pro-
grammed with one of the following func-
tions:
l Night Relay: The night relay activates if
the system is in night mode and there is
an incoming CO line or door phone ring.
In programming, the relay can be set to
activate continuously (for indirect (
answering machine control) or pulsating
at 1 second ON/3 seconds OFF (for a
night bell) when a CO line or door phone
rings.
l Hold Relay: The hold relay activates
any time a CO line is on hold. It is nor-
mally used to control the music-on-hold
source. A common source controlled by
this relay is a tape deck (see Music-on-
Hold).
NOTES:
1. Door lock control is also provided via
HDCBs (see Door Lock Control).
2. Both relays reside on the option inter-
face PCB (PIOU, PIOUS, or PEPU).
Therefore, a PIOU, PIOUS, or PEPU is
required for any relay functions dis-
cussed above.
Remote Administration and Maintenance:
System administration, programming, and
maintenance can be performed from a remote
l
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