ZPI-4 Technical Practice
TECHNICAL
Practice
TELECOM SOLUTIONS
ZPI-4
Four Zone
Paging Interface
Practice
FOR THE
2 1 S T C E N T U RY
July 11, 2000
Four Zone Paging Interface
The ZPI-4 is a four-zone Touch Tone controlled paging system capable of switching a line level signal (600 ohms) to
amplifiers, 70V signal to speakers or an amplified signal
(200 watts maximum into 8 ohms) to speakers.
The ZPI-4 features balanced audio circuitry throughout for
low noise and compatibility with balanced paging system
inputs and outputs.There are separate level controls for
paging and background music, and background music can
be disabled on a per-zone basis. Also provided is a night
bell with adjustable volume activated by a dry contact closure, a ringing C.O. or a ringing analog PABX/KSU station.
The ZPI-4 is compatible with ringing C.O. lines, Centrex lines and analog PABX/KSU station
ports (disconnects on silence, CPC, busy or time-out) as well as unused trunk inputs, and will
interface directly with standard paging ports.
Features
• Touch Tone control of four zones, expandable to
8 zones
• Switches line level signal to amplifiers or amplified
signal to speakers (amplifier(s) not included)
Applications
• Multiple zone paging for Centrex systems
• Multiple zone paging for phone systems with paging ports, unused analog station ports or unused
trunk inputs
• Multiple department manufacturing business
• Balanced audio circuitry for low noise
• Multilevel warehouse
• Night bell warble with adjustable level from contact closure or ringing analog line
• Multi building office complex
• Input provided for background music
• Separate paging and background music level
adjustments
• Background music automatically mutes in paged
zone(s) in all but single amplifier mode
• All-call and five group call patterns, selected by
Touch Tones
• Adjustable page alert tone level
• Interfaces with ringing C.O. lines, Centrex lines,
and analog station ports, paging ports and
unused phone system trunk ports
• Disconnects on silence, CPC, busy or time-out
• Screw terminals for all input/output connections
• Compatible with Viking’s FBI-1A Anti-Feedback
Paging Interface (Fax Back Document 465)
Phone...715.386.8861
info@vikingelectronics.com
h t t p : / / w w w. v i k i n g e l e c t r o n i c s . c o m
Specifications
Power: 120V AC/13.8V AC, 1.25A adapter provided
Dimensions: 210mm x 159mm x 45mm (8.25” x 6.25” x 1.75”)
Shipping Weight: 1.5 kg (3.2 lbs)
Environmental: 0° C to 32° C (32° F to 90° F) with 5% to 95%
non-condensing humidity
Relay Contacts: 5 Amps@30V DC/250V AC each (200w@8Ω)
REN: 0.5 A
Artificial Talk Battery Voltage: 24V DC
Connections: (34) cage clamp screw terminals
Installation
Page Alert Volume
Minimum
Maximum
Night Warble Volume
Minimum
Maximum
Page Volume
Minimum
Music Volume
Maximum
Minimum
Maximum
C.O. Line, PABX extension, trunk input,
or page port
To Telco In of second ZPI-4
Selects ringing line,
PABX trunk or page port
Music source
To Music In of second ZPI-4
ON - PABX Trunk
OFF - Ring Trip/Page Port
Phone system page contacts (if provided)
To input contacts of second ZPI-4
Time out adjustment
Phone system night ring (if provided)
Phone system night contacts (if provided)
VOX sensitivity
Power input
(For future use only)
Remove shunts to eliminate background
music for each zone.
A. Four Amplifier Mode
In this mode, each paging zone has its own amplifier, and the function
of the ZPI-4 is to switch the unamplified paging or background music
signal to the appropriate amplifier.
Advantages: There is no amplifier power limitation, zones can be set
to different volumes, background music is selectable per zone and the
non-paged zones will continue to get music during a page.
To set the ZPI-4 up in the four amplifier mode:
1. Hook up the ZONE 1 screw terminals to the input of the amplifier
for Zone 1.
2. If background music is to be enabled on
this zone, ensure that the ZONE 1 music
shunts are in place, covering both pins.
If not, remove the shunts.
Paging
Amplifier
3. Repeat steps 1 and 2 for each of the remaining
three zones.
4. Install two of the included jumpers on the Optional Paging Amp
screw terminals.
5. If a background music source is being used, install the remaining two
jumpers on the Optional Music Amp screw terminals.
6. Set DIP switch 1 to OFF.
Install the included (4)
jumpers as shown.
Paging
Amplifier
Paging
Amplifier
Paging
Amplifier
B. Two Amplifier Mode
In the two amplifier mode, one amp serves as the paging amplifier and the other as the background music amplifier.
The paging or music signal is sent to the external amplifier, returned and the amplified signal is switched by the ZPI-4
to the correct zone or zones.
Advantages: Any size amplifier may be used when driving 70V
speakers, only (2) amplifiers (or one stereo amp) are required for 4
zones, background music is selectable per zone, and the non-paged
zones will continue to to get music during a page.
Limitations: The paging amp needs to be limited to 200 watts and
the music amp needs to be limited to 70 watts when switching 8 ohm
speaker loads, each speaker zone is limited to 8 ohms minimum
impedance and the amp must have the ability to drive the speakers
of all zones. (Example: 4 zones at 8 ohms per zone equals a 2 ohm
load during an all call.)
To set up the ZPI-4 in the two amplifier mode:
1. Hook up the ZONE 1 screw terminals to the
speaker(s) for Zone 1.
2. If background music is to be enabled on this zone,
ensure that the ZONE 1 music shunts are in place, covering both pins.
If not, remove the shunts.
Music Amplifier
Input
Output
Paging Amplifier
Input
Output
3. Repeat steps 1 and 2 for each remaining zone.
4. Hook up the optional paging amp and the optional music amp as shown.
5. Set DIP switch 1 to OFF.
C. Single Amplifier Mode
In this mode, one external amplifier handles both paging and background music. An internal relay capable of switching between paging
signal and music signal sends input to this amp, the amplified signal is
returned and the ZPI-4 sends it to the correct zone(s).
Advantages: Any size amplifier may be used when driving 70V
speakers, only one amplifier is required.
Limitations: The amplifier needs to be limited to 200 watts, each
speaker zone is limited to an 8 ohm minimum impedance, the amplifier must be able to drive the speakers of all zones (Example: 4 zones
at 8 ohms per zone equals a 2 ohm load during an all call); if background music is used, all zones will receive background music and it
will be muted in all zones during a page.
Paging Amplifier
To set up the ZPI-4 in the single amplifier mode:
Input
Output
1. Turn Dip switch 1 on. This tells the ZPI-4 that it is
operating in the single amplifier mode.
2. Hook up the ZONE 1 screw terminals to the speaker(s) for Zone 1.
3. Repeat step 2 for each of the remaining three zones.
4. Hook up the optional paging amp as shown.
Programming
Switch
1
2
3
4
ON/OFF Description
ON
Single amplifier
OFF
Two or more amplifiers
ON
Two units
OFF
Single unit
ON
Slave unit
OFF
Master unit
ON
Dial tone enabled
OFF
Dial tone disabled
Note: DIP switches should be set prior to powering up the ZPI-4. If power has already been applied, momentarily power
down the unit so the switches will take effect.
A. Phone System Interface
1. Ring Trip Paging
a. Set the RING TRIP/TRUNK/PAGE PORT switch to the RING TRIP position.
b. Set the TALK BATT switch to the OFF position.
c. Hook up TIP and RING to the TELCO IN screw terminals.
d. Hook up the background music source, if used, to the MUSIC IN screw terminals.
e. Adjust the TIME OUT ADJUST as required (adjustable from approximately 5 seconds to 80 seconds). This should
be set to a second or two longer than the longest expected page. The ZPI-4 hangs up when this timer is up, and
if the timer is set for too short a time, the ZPI-4 will hang up in the middle of a page.
f. The VOX SENSITIVITY probably will not have to be adjusted unless the ZPI-4 is disconnecting in the middle of
pages and this is happening before the time set by the TIME OUT ADJUST or there is a period of silence during a page longer than three seconds and the ZPI-4 does not auto-disconnect. To adjust the VOX SENSITIVITY,
turn the pot counter clockwise to decrease the vox sensitivity and clockwise to increase it. The VOX SENSITIVITY should be decreased if the ZPI-4 is auto-disconnecting in the middle of pages, and increased if it is not autodisconnecting on periods of silence longer than three seconds.
g. If the phone system provides a contact closure for night ring, connect a pair of wires from this closure to the
NIGHT CONTACTS screw terminals. If the phone system provides ring signal for night ring, hook up a pair of
wires from the phone system night ring output to the NIGHT RING screw terminals.
h. Select dial tone if desired by putting DIP switch 4 to ON, otherwise turn it OFF.
2. Paging from an Unused Phone System Trunk Input
Note: In this mode, the ZPI-4’s time out and VOX sensitivity are disabled. The ZPI-4 will release the trunk as soon
as the paging party hangs up.
a. Set the RING TRIP/TRUNK/PAGE PORT switch to the TRUNK/PAGE PORT position.
b. Set the TALK BATT switch to the ON position.
c. Hook up TIP and RING to the TELCO IN screw terminals.
d. Hook up the background music source, if used, to the MUSIC IN screw terminals.
e. If the phone system provides a contact closure for night ring, connect a pair of wires from this closure to the
NIGHT CONTACTS screw terminals. If the phone system provides ring signal for night ring, hook up a pair of
wires from the phone system night ring output to the NIGHT RING screw terminals.
f. Select dial tone if desired by putting DIP switch 4 to ON, otherwise turn it OFF.
3. Paging from a Phone System’s 600 Ohm Paging Port
Note: You must be able to send Touch Tones through the PABX’s paging port for this mode to work.
a. Set the RING TRIP/TRUNK/PAGE PORT switch to the TRUNK/PAGE PORT position.
b. Set the TALK BATT switch to the OFF position.
c. Hook up a pair of wires from the paging port to the TELCO IN screw terminals.
d. Hook up the background music source, if used, to the MUSIC IN screw terminals.
e. If the phone system provides a page dry contact closure, connect a pair of wires from this closure to the INPUT
CONTACTS screw terminals. In this application, the ZPI-4’s time out and VOX sensitivity are disabled. The ZPI4 will release the page port as soon as its INPUT CONTACTS open.
f. If the phone system does not provide a page dry contact closure, adjust the TIME OUT ADJUST as required
(adjustable from approximately 5 seconds to 80 seconds). This should be set to a second or two longer than the
longest expected page. The ZPI-4 hangs up when this timer is up, and if the timer is set for too short a time, the
ZPI-4 will hang up in the middle of a page.
The VOX SENSITIVITY probably will not have to be adjusted unless the ZPI-4 is disconnecting in the middle of
pages and this is happening before the time set by the TIME OUT ADJUST or there is a period of silence during a page longer than three seconds and the ZPI-4 does not auto-disconnect.
To adjust the VOX SENSITIVITY, turn the pot counter clockwise to decrease the vox sensitivity and clockwise
to increase it. The VOX SENSITIVITY should be decreased if the ZPI-4 is auto-disconnecting in the middle of
pages, and increased if it is not auto-disconnecting on periods of silence longer than three seconds.
g. If the phone system provides a contact closure for night ring, connect a pair of wires from this closure to the
NIGHT CONTACTS screw terminals. If the phone system provides ring signal for night ring, hook up a pair of
wires from the phone system night ring output to the NIGHT RING screw terminals.
h. Put DIP switch 4 to OFF to disable the ZPI-4’s dial tone.
B. Multiple Units
While the ZPI-4 is a four zone paging unit, it may be cascaded with an additional ZPI-4 for a total of up to eight paging zones. The first ZPI-4 is considered the “Master” unit, and the other unit is considered a “Slave”. To use the ZPI4 in this way, install the Master unit and then use the following directions to install the Slave unit.
1. Select an amplifier mode, shown in Installation sections A-C.
2. Set DIP switch 2 to ON for both the Master and Slave. This sets both ZPI-4s for multiple units.
3. On the Slave unit, set DIP switch 3 to ON. On the Master unit, leave OFF.
4. If dial tone is desired, set DIP switch 4 on the Master unit to ON. This will enable dial tone for both units. On the
Slave unit, DIP switch 4 should remain OFF.
5. On the Slave unit, set the RING TRIP/TRUNK/PAGE PORT switch to the same as the Master.
6. On the Slave unit, set the TALK BATTERY switch to OFF.
7. Connect a pair of wires from the TELCO OUT of the Master to the TELCO IN of the Slave.
8. Connect a pair of wires from the MUSIC OUT of the Master to the MUSIC IN of the Slave.
9. Connect a pair of wires from the OUTPUT CONTACTS of the Master to the INPUT CONTACTS of the Slave.
10. If night warble is desired through the Slave’s zones, connect a pair of wires from the NIGHT RING or NIGHT
CONTACTS (depending on which application you are using) of the Master to the NIGHT RING or NIGHT CONTACTS of the Slave.
Note: In the Trunk/Page Port mode, the Slave’s night warble volume should be set to minimum (fully counter-clockwise). The Master’s night warble volume will control the Slave’s zones. In Ring Trip mode, the Master and Slave’s
night warble volumes will work independently.
11. Set the TIME OUT ADJUSTMENT on the Slave to the maximum time (clockwise).
12. Plug the power supply adapter into the power jack of the Slave, and the other end into a wall outlet.
Operation
A. Initiating a Page
1. Ring Trip Paging
To access the ZPI-4 for ring trip paging, call the C.O., Centrex number or PABX/KSU station number the ZPI-4
is connected to. The ZPI-4 will answer on the first ring, produce dial tone (if enabled) and await Touch Tone entry
for 10 seconds. If there is a Touch Tone entry, the ZPI-4 activates the selected zone(s). If there is no Touch Tone
entry in 10 seconds, the ZPI-4 disconnects.
2. Paging from an Unused Phone System Trunk Input
To make a page with the ZPI-4 installed on a spare trunk port, simply access the trunk connected to the ZPI-4.
The ZPI-4 will produce dial tone (if enabled), wait for Touch Tone entry, and activate the selected zone(s) when it
sees a Touch Tone entry.
3. Paging from a Phone System’s 600 Ohm Paging Port
To page in this situation, access the phone system’s paging port. The ZPI-4 will detect that a page is being initiated and wait for a Touch Tone entry. When it sees an entry, it activates the selected zone(s).
B. Selecting Zones
Touch Tone
Zone(s)
1
1
2
2
3
3
1. Selecting Zones with One ZPI-4
Enter a single Touch Tone to select the zone or zones to be paged. After this entry
has been made, the ZPI-4 activates the selected zone(s). See diagram to the right.
2. Selecting Zones with Multiple ZPI-4’s
To page all zones, enter a Touch Tone “0”. The
ZPI-4 will activate all zones to which it is connected. Otherwise, enter two Touch Tones,
with the first selecting which ZPI-4 is being
addressed, and the second selecting which
zones connected to that ZPI-4 are to be
paged. If a Touch Tone “1” is entered as the
first digit, the Master is selected. If a Touch
Tone “2” is entered as the first digit, the Slave
is selected. See diagrams to the right.
4
4
5
1+2
6
2+3
7
3+4
8
1+2+3
9
2+3+4
0
1+2+3+4 (All)
Touch Tone
Unit
Zone(s)
Touch Tone
Unit
Zone(s)
0
All
All
21
2
1
2
2
3
11
1
1
22
12
1
2
23
2
13
1
3
24
2
4
14
1
4
25
2
1+2
15
1
1+2
26
2
2+3
16
1
2+3
27
2
3+4
17
1
3+4
28
2
1+2+3
18
1
1+2+3
29
2
2+3+4
19
1
2+3+4
20
2
1+2+3+4
10
1
1+2+3+4
C. Paging
After there has been a Touch Tone entry, the ZPI-4 activates the selected zones and produces a paging alert tone. At
this point the page can be spoken into the handset of the phone. In a RING TRIP or PAGING PORT WITHOUT CONTACT CLOSURE application, it is necessary to keep in mind that there is a time limit on the page, set by the TIME
OUT ADJUSTMENT. Also, in these two applications, the vox voice detect circuit will disconnect the page if three seconds of silence elapse during the page. When finished paging, simply hang up.
Product Support Line...715.386.8666
Fax Back Line...715.386.4345
Due to the dynamic nature of the product design, the information contained in this document is subject to change without notice. Viking Electronics, and its affiliates and/or
subsidiaries assume no responsibility for errors and omissions contained in this information. Revisions of this document or new editions of it may be issued to incorporate
such changes.
Fax Back Doc 499
Printed in the U.S.A.
ZF301280 Rev A
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