Call Stacker
Installation and Use Manual
Issue 1, October 1999
© 1999 Bogen Communications, Inc.
All rights reserved. 54-2025-01 9910
Model: LULCST
PEC Code: 5325-150
COM Code: 408184018
Select Code: 701-000-118
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Contents
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Introduction
The Call Stacker is a microprocessor based audio
recording and announcement system. The Call Stacker is used in conjunction
with a paging system to provide buffered announcement play to the paging
system.
Figure 1-1. Call Stacker Unit
The Call Stacker features 5 Input Station (recording) channels, a single Page
Output channel and 3 minutes of recording time.
Up to 5 announcements can be recorded simultaneously, virtually eliminating
frustrating delays encountered when accessing the paging system. The recorded
announcements are queued in order so the first announcement recorded that has
hung up, plays first, followed by the second announcement, etc.
The Call Stacker allows users to verify their announcements before they play to
the paging system. If a user is not content with their recorded announcement,
they can re-record it repeatedly until they are satisfied.
The Call Stacker's Page Output channel interfaces to the paging system's control
unit. Once an announcement is recorded, the Call Stacker plays the
announcement over the Page Output channel to the paging system. While the
recorded announcement is playing, the Page Output channel provides a contact
closure to the paging system.
Once the complete recorded announcement plays to the paging system, it is
erased from the Call Stacker, freeing up the recording time for new
announcements.
The Call Stacker can be configured to record and play back paging zone
selection signals. Between 2 and 4 DTMF digits can be entered prior to recording
an announcement which, upon output, precede the recorded announcement and
select the paging system's paging zone.
NOTE: Associated
equipment would need
to be powered by an
uninterrupted power
supply.
The Call Stacker is equipped with battery backup which allows it to operate for up to
two hours, from a fully charged battery, if a power failure occurs.
1-2
Overview
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Before You Start
Before installing your system, read and understand the safety instructions on
page ii (inside front cover). Be sure you have all the necessary parts, tools, and
test equipment, listed below.
2. Check Shipping Container Contents.
Call Stacker Unit
Mounting Hardware (screws and brackets)
Power Cord
This Installation and Use Guide
3. Have Required Tools
The following tools are required for the installation of the hardware and cabling.
Phillips screwdriver (small and large)
Standard blade screwdriver (small and large)
Wire strippers (24 AWG - 12 AWG)
Telephone test set
Tone out circuit tester (optional, for troubleshooting)
Volt-ohm Meter (optional, for troubleshooting)
4 wood screws, if mounted on wall
4. Verify Interface Compatibility with Telephone System and Paging System (see
Overview 1-3
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Table 1-1. Call Stacker Connectivity Chart.
FORWARD
DISCONNECT
SYSTEM
CONNECTIVITY
STATION GROUPING
Yes (Release 2 or
later)
PARTNER PLUS
PARTNER II
Standard
Standard
—
Hunt Group
Hunt Group
—
Yes
No
Spirit 308/616,
1224/2448
Merlin 206/410/820
Merlin II
No
—
Yes (see note 1)
—
—
GCD (Group Call Distribution)
—
Yes (Release 3)
Merlin Plus
Merlin 1030/3070
Legend
No
No
—
—
Yes
Yes
Yes
Yes
No
Yes (see note 2)
Standard
Yes (see note 3)
Yes (see note 4)
—
Calling Group, Circular
Station Hunting, Circular
UCD (Uniform Call Distribution)
UCD (Uniform Call Distribution)
—
System 25
Definity
System 85
Dimension
Horizon
Yes
Standard
Hunt Group, Circular
NOTE:
1. In order for the Merlin II to send a forward disconnect, set the station option for AA/VMS. The 012
station module must be “F” version or greater.
2. Make the Calling Group a “Generic VMI” type.
3. In order for the Definity to send a forward disconnect, Adjunct Supervision needs to be optioned “Yes” at
the station level.
4. In order for the System 85 to send a forward disconnect, the Class of Service needs to change to
“Origination Restriction.”
1-4
Overview
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Installation Steps
1. Attach the reversible brackets to the Call Stacker using the 6-32 x 3/8" screws
provided, then secure the Call Stacker to a back board or into an equipment
rack.
Figure 2-1. Wall Mounted Unit
Figure 2-2. Rack Mounted Unit
2-2
Installation
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desired system configuration (refer to Table 2-1).
NOTE: When the switch
#7 is “OFF”, there
will be no delay in time
from when the paging
system zone is
accessed until the time
when the message is
sent. When the switch
#7 in “ON”, there will
be a 2 second delay
from when the paging
system/zone is
accessed until the time
when the message is
sent. The delay is
installed in order for a
Confirmation/
Table 2-1. Option Switch Setting.
SET
SET
SET
SET
SET
SET
SET
SWITCH SWITCH SWITCH SWITCH SWITCH SWITCH SWITCH
# 1 TO
# 2 TO
# 3 TO
# 4 TO
# 5 TO
# 6 TO
# 7 TO
Number of DTMF Digits in Zone Code
0
ON
OFF
ON
ON
ON
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2
3
OFF
OFF
4
OFF
Voice Prompts
None
—
—
—
—
—
—
—
—
ON
OFF
ON
ON
ON
—
—
—
—
—
—
—
—
—
—
—
—
English only
Spanish only
English/Spanish
Pre-announcement
tone (if available or
optioned) to be played
over the system before
the message is sent.
OFF
OFF
OFF
Length of Recording Cut Off (when user hangs up during recording)
None
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
ON
OFF
ON
ON
ON
—
—
—
—
0.25 sec
0.50 sec
0.75 sec
OFF
OFF
OFF
Confirmation or Pre-Announcement Tone
2 Second Delay
SEE NOTE
—
—
—
—
—
—
■
■
Connect the Call Stacker's Page Output to the attendant override (attendant
access control leads) or incoming alarm signal from the paging system.
NOTE: PBX and KTS
stations must have the
ability to send a
forward disconnect to
the Call Stacker's
Station inputs.
Connect one or more of the Call Stacker's Input Station channels to PBX/KTS
analog station inputs on the telephone system through FCC/DOC approved
modular jacks.Connect the Call Stacker's Page Output channel to the paging
jack. The control contact signal is used to secure and release the paging system
Installation 2-3
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4. Connect the detachable power supply cord between a 110/120 VAC outlet and the
Call Stacker and verify the Power LED illuminates.
5. Turn the battery switch ON.
Installation 2-5
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2-6
Installation
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Operation
Controls and Indicators
Figure 3-1. Rear Panel Detail
Table 3-1. Rear Panel Description
ITEM
DESCRIPTION
Power On LED
Illuminates when power is supplied to the Call Stacker.
Enables/disables the Page Output channel. When a contact
closure (a short) between the two terminals is detected, the
Call Stacker terminates the outgoing announcement (if any),
requeues it and disables the Page Output channel. When
the contact closure is removed, the Page Output channel is
re-enabled and the terminated announcement plays to the
paging system in its entirety (see note below).
Pause Override Control
Input
Input Station
(record) Channels
PBX and KTS analog station interfaces (tip/ring pairs) to the
Public Telephone Network, a PABX or a Key System.
Audio and control contact signals to the paging system as
control contact opens for a minimum of 250 msec. to release
the paging system controller.
Page Output Channel
Option Switch
Battery Switch
Power Input
Enables/disables battery backup. Turn the switch ON to
enable the battery backup.
110/120 VAC, 60Hz, power input
NOTE: The Input Station channels continue to operate when a contact closure is detected. Recorded
announcements are held in a queue and play out sequentially (first in, first out) when the contact
closure is removed.
3-2
Operation
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Recording Announcements
Voice Prompts
Enabled
1. Dial up the input station connected to the Call Stacker. The Call Stacker answers
the trunk and responds “Enter zone code (Marque el codigo de la zona)”. Proceed
to step 2.
NOTE: If the number of
digits in the paging
zone is set to 0 (see
Stacker answers the
trunk and responds
“Start recording, press
the pound key to end or
hang up (Empieze a
grabar el mensage,
para terminar la
2. Enter a DTMF tone sequence using the telephone keypad to select a paging
zone.
■
Stacker responds “Start recording, press the pound key to end or hang up
(Empieze a grabar el mensage, para terminar la grabación cuelge o marque la
tecla de numero)” followed by a high tone. Proceed to step 3.
grabación cuelge o
marque la tecla de
numero)” followed by a
high tone. Skip step 2
and proceed to step 3.
IMPORTANT: If all the
recording time is used
up, the Call Stacker
answers the trunk and
responds with “No
recording time
available (No hay
tiempo de grabación
disponible)” or
“Message not
recorded (No hay
mensajes grabados)”
then disconnects. If this
occurs wait a few
3. Record the announcement. To end recording, either:
■
■
Hang up to enter the recorded announcement into the queue, or
Press the “#” key to hear the recorded announcement. The Call Stacker
responds “Hang up if finished, press zero to re-record or stay on the line to
review your message (Cuando termine de grabar cuelge, marque la tecla cero
para regrabar, o siga en la linea para escuchar el mensage grabado)”, plays
back the recorded announcement and then responds “Hang up if finished,
press zero to re-record (Cuando termine de grabar cuelge, marque la tecla
cero para regrabar)”. Press the “0” key to re-record the announcement and
return to step 2 or hang up to accept the announcement and enter it into the
queue.
seconds before re-
attempting to record
the announcement.
NOTE: Press the “#”
key while the voice
prompts are playing to
interrupt (and skip)
them.
Operation 3-3
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Voice Prompts
Disabled
1. Dial up the input station connected to the Call Stacker and wait for the Call
Stacker to answer the trunk and respond with a high tone. Proceed to step 2.
NOTE: If the number of
digits in the paging
zone is set to 0 (see
and proceed to step 3.
2. Enter a DTMF tone sequence using the telephone keypad to select a paging
Call Stacker responds with a high tone. Proceed to step 3.
3. Record the announcement. To end recording, either:
Important: If all the
recording time is used
up, the Call Stacker
responds with two
consecutive low tones
then disconnects. If this
occurs your
announcement has not
been recorded. Wait a
few seconds before re-
attempting to record
the announcement.
■
■
Hang up to enter the recorded announcement into the queue, or
Press the “#” key to hear the recorded announcement. The Call Stacker
responds with a high tone, plays back the recorded announcement and then
responds with a second high tone. Press the “0” key to re-record the
announcement and return to step 2 or hang up to accept the announcement
and enter it into the queue.
Announcement Playback
Once a recorded announcement is entered into the queue, the Call Stacker
immediately closes the control contact on the Page Output channel to access the
paging system controller.
The Call Stacker then plays out the recorded DTMF sequence to select the
paging zone followed by the recorded announcement.
At the end of the announcement the Call Stacker erases the announcement and
opens the control contact on the Page Output channel to release the paging
system controller.
NOTE: If more than
one announcement is
in the queue, the
Important: If at any time a contact closure is detected on the Pause Override Control
Input, the Call Stacker immediately terminates the outgoing announcement and
requeues it for playback in its entirety once the contact closure is removed.
control contact
remains open for a
minimum of 250 msec.
3-4
Operation
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Maintenance
Troubleshooting
NOTE: The suggested
reliable lifetime of the
There are no serviceable parts in the Call Stacker:
rechargeable battery used in
the equipment is 36 months.
To ensure the system has
reliable battery backup, it is
recommended the battery be
replaced every 30 months.
If the Call Stacker does not operate during a power failure:
n
n
Verify the battery switch is turned ON.
Verify the battery is fully charged. Allow 48 hours to fully charge.
Specifications
Table 3-2 lists the specifications for the Call Stacker unit.
Table 3-2. Call Stacker Unit Specifications
SPECIFICATION
DESCRIPTION
Recording Time
Input Lines
n
n
n
n
3 minute base unit.
5 analog station ports.
1 page output channel.
30 individual announcements.
Output Lines
Number of stacked
Announcements
Power Supply
n
115 VAC, 60 Hz.
n
n
Height:
Width:
1.75 inches (4.4 cm).
16.25 inches (41cm) without brackets, 19 inches (48.3 cm) with brackets
attached.
Dimensions and Weight
n
n
Depth:
9.25 inches (23.5 cm).
Weight: 13 pounds (6 kg).
n
n
0 to +40 deg. C. (32 to 104 deg. F.) operational.
–40 to +66 deg. C. (–40 to +150 deg. F.) storage and shipment.
5% to 95% (non-condensing) storage/shipment and operation.
Sea level to 10,000 ft. operational (1048 to 648 millibars) 40,000 ft. max. shipment.
Locate in an area free of excess moisture, corrosive gases, dust, and chemicals.
Allows up to two hours of operation during a power failure. Total charge time 48 hours.
200 Hz to 3.4 kHz ( 3 dB).
Temperature Range:
Humidity Range:
Altitude:
n
n
n
n
n
n
Environmental
Battery Backup
Frequency Response
Output Level
–9 dBm.
n
n
n
0.3 A / 60 VDC
Control Contact Rating
1.0 A / 24 VDC
0.5 A / 120 VAC
NOTE: Specifications are approximate and are subject to change without notice.
Operation 3-5
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