5 947100
3.
When the paging system is in several buildings or
on several floors of a single building, locate power
supply in each building or on each floor being
paged.
E-Key or PABX Page Port Access
Page Zone 1
Page Zone 2
Page Zone X
In V-1094A
V-2000A
V-2001A
Out
In
V-1094A
V-2000A
V-2001A
Out
Power Supply
Valcom One-Way
Amplified Speaker
Assemblies
DIAGRAM 2
Block Diagram of Multiple Zones of One-Way Paging
From Multiple Telephone System Page Ports
The Valcom V-1094A, V-2000A or V-2001A control
units may be used for page port access to Valcom
paging. Each of these units provide one zone of
one-way paging. If more than one page port is
available a V-1094A, V-2000A or V-2001A may be
used on each port for multizone paging. Refer to
Tables 2 and 3. For help in speaker and power supply
selection refer to the section titled
"1A2, Dedicated
Single Line Set, E-Key, or PABX Paging" .
NOTE: Generally, Valcom dial select multizone page
units may not be used on page port output. (The
V-2003A and V-2006A may be used on certain page
ports).
Station level Paging
The Valcom V-9940 and V-9970 Station level Page
Adapters may be utilized to provide access to a single
or multiple zone paging system via an incoming central
office line, Centrex//Essex line or PABX station.
This device.
1)
Accepts a ringing phone line or station port.
2)
Answers that line.
3)
Provides line level audio to the paging system.
For a single zone of paging, Valcom One-way
Amplified Speakers may be directly connected to the
audio output of the station level page adapter.
Electrically, station level page adapters act like a
"self-answering" telephone.
The V-9940 and V-9970 are FCC registered for direct
connection to the public telephone network, and also
carry U.L. 1459 approval. It will ring trip from 70 to
105 VRMS (20 to 30 hertz) ringing voltage.
With a single line telephone, the called party provides
the disconnect at the end of the conversation by going
"on hook". A station level page adapter, on the other
hand, has no way of "knowing" when the calling party
has finished speaking. This unit has to sense line
conditions in order to determine when it is time to
disconnect.
With the V-9940 and V-9970, this line condition may
be quiet line sensing, a strict "time out" (disconnects
after a selected period of time) or open loop disconnect
of at least 150 milliseconds. Open loop is a service
provided by the central telephone office and involves
actually disconnecting the telephone line from the C.
O. for a brief instant. In some cases the "quiet line"
may also be programmed via the PABX. "Quiet line"
implies that the PABX will not return any tones (dial
tone, busy tone, reorder tone . . . etc.) to the called
station at the completion of the station to station call.
The telephone system may be tested for a "no returned
tones" status with your test set; have someone call you
on a station and then ask them to hang up . . . if you do
not hear any tones, or if there is a delay of at least 10
seconds before you hear any tones, then the "quiet
line" (i.e. audio sense time-out) may be used.
Ground start telephone lines are a good choice for use
with the V-9940 since a ground start line will not
return dial tone until a ground is applied to the ring
lead.
Additionally, the V-9970 recognizes re-order tones and
dial tone as disconnect signals.
The V-9940 can be used alone, or can provide access
to Valcom multi-zone and talkback page control units.
The V-9970 may be used to access the V-2003A and
V-2006A multi-zone control units only. The V-9970 is
not compatible with any talkback page control units.
