Valcom V-2920 Manual de usuario descargar pdf (Pagina 5)

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for guidelines concerning maximum allowable

distances for power runs.

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

V-1094A

V-2000

V-2001A

Out

V-1094A

V-2000

V-2001A

Out

Power Supply

Valcom One-Way

mplified Speake

Assemblies

DIAGRAM 2

Block Diagram of Multiple Zones of One-Way Paging

From Multiple Telephone System Page Ports

The Valcom V-1094A, V-2000 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-2000 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 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 is FCC registered for direct connection

to the public telephone network, and also carries U.L.

1459 approval. It will ring trip from 75 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.

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.

Station Level

Page Adapter

Page

Control /

Interface

Incoming C. O.

or Centrex line or

a PABX Station

DIAGRAM 3

Block Diagram of Connections to a Valcom

Page Control/Interface

Your Telephone or

Telephone System

1 2 3 4 5 6 7 8 9 10 11 12 13

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