PA2
PAGING SWITCH
For Technical Assistance
Please Phone: (07) 5596 5128
Page 2 National Communications
PACKING LIST
Y our Model PA2 Paging Switch is supplied as a complete kit, ready for
quick and easy installation by the user.
Description Qty
PA2 Paging Switch 1
12V Power Adaptor 1
Telephone Line Cord, fitted with a male plug 1
ACMA approved Line Isolation Unit 1
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OPERATION
Our Model PA2 Paging Switch is designed to connect to an analogue
extension of a P ABX type telephone system.
It can also be connected direct to an analogue PSTN telephone line, for
special applications such as telephone exchange based P ABX solutions.
Once installed, P A2 provides you with the cap ability to make a Paging
Call from any extension of your P ABX, as follows :
1. DIAL AN EXTENSION NUMBER
To make a paging call, the user need only dial the telephone extension
number that PA2 is connected to.
2. MAKE YOUR ANNOUNCEMENT
PA2 will automatically answer the incoming call after 2 rings and then
connect the caller to the attached paging amplifier . The caller can then
make a paging announcement and hang up.
3. HANG UP
P A2 has a ‘hang up tone’ detection circuit which will then terminate the
call after the detection of 3 Australian specification hang up tones. PA2
will then be ready to take another paging call.
IMPORTANT NOTE
P A2 is calibrated to detect Australian S pecification Hang Up tones. If your
PABX telephone system has not been set to output Australian Specification
Hang Up tones when a call is terminated, then you should change it to do
so.
If your PABX telephone system cannot output Australian S pecification Hang
Up tones, then PA2 can terminate a call after any one of the following
conditions takes place :
1) By pressing any TOUCH TONE digit after the announcement.
2) After a fixed period of time (set by the user).
3) Af ter detection of a period of silence (set by the user).
See pages 6-7 for full details.
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INSTALLATION
Refer to the Installation Diagram on Page 5.
1. Unplug all equipment from the Analogue telephone extension
socket to be used.
2. Connect the TELEPHONE EXTENSION port of PA2 Switch to the
Analogue telephone service, using the supplied cable fitted with a
male plug.
3. Locate the supplied Line Isolation Unit (LIU) and connect the
SYSTEM port of the LIU to the PA SYSTEM port of the PA2
Switch, using the supplied RJ to RJ telephone line cable.
4. Connect the SOURCE end of your LIU to the Line In or Auxiliary
Input of the Amplifier, using the appropriate supplied Audio cable.
One cable has a 3.5mm Audio plug while the otherr has an RCA
Audio plug.
Refer to the Installation Diagram on Page 5.
Refer to the section LINE ISOLATION UNIT on Page 8.
5. Connect the supplied 12V power adaptor to the P A2 SWITCH and
switch the power ON.
6. Switch your Amplifier ON, place a paging call to the PA2 switch
and adjust your P A volume to suit.
7. Hang Up.
Note : If P A2 does not terminate the paging call soon after you
have hung up, then your Telephone System is not outputing
Australian specification Hang Up tones and you should program it
to do so (see page 6), or use one of the other call termination
methods described (see page 7).
8. User Programming of P A2 Switch parameters.
Four separate User Programmable parameters are provided.
In most cases you will not need to program PA2 .Refer to pages
6-11.
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INST ALLA TION DIAGRAM
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HANG UP TONE DETECTION
PA2 incorporates a HANG UP TONE DETECTOR which is designed to
detect ‘Australian’ specification hang up tones, that will normally be present
at the completion of a Paging call. This process is fully automatic.
When PA2 is installed on a PABX system, the Hang Up tone generated
may be outside of the cadence and frequency normally used in Australia for
Hang Up tones.
In this situation, P A2 may not hang up until the Maximum Paging Call T ime
has elapsed (see section 4, page 7), or after a period of silence (see section
3, page 7). Our Hang Up detector , looks for :
1. A Tone Frequency between 300Hz and 600Hz.
2. A Tone Duration between 300mS and 600mS.
3. A 50% Duty Cycle +/- 20%
(ie ON and OFF periods should be the same +/- 20%)
You should adjust your PABX system to generate Hang Up tones as per
the above specification, or to output normal Australian Hang Up tones.
OR
Y ou should use one or more of the other Call Termination methods described
on page 7.
ELECTRO MAGNETIC INTERFERENCE
Electromagnetic Interference (EMI) from some Switch Mode Power Supplies
and some low end UPS units (Uninterruptable Power Supplies) can prevent
hang up tones being detected by P A2.
Switch Mode Power Supplies are easily identified because they do not use
a transformer and are very light.
TURN OFF any SWITCH MODE POWER SUPPLIES located near PA2
(and its power adaptor) and test if the problem is resolved. If the problem is
resolved you should move the offending Switch Mode Power Supply away
from PA2 (and it s power adaptor) to a distance that overcomes the problem.
If the P A2 power adaptor is connected to an Uninterruptable Power Supply ,
remove it and test if the problem is resolved.
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CALL TERMINATION OPTIONS
A paging call be terminated in any one of 4 ways :
1. UPON DETECTION OF HANG UP TONES
PA2 is pre-programmed to automatically HANG UP the paging call af ter
the detection of 3 Australian Specification Hang Up tones.
Important Note : PA2 is calibrated to look for Australian specification
Hang Up tones (see page 6).
You can change the detection parameters or disable this facility (refer
pages 9-1 1).
2. BY THE CALLER PRESSING ANY TOUCH TONE
The person making the Paging Call can terminate the paging call by
pressing ANY Touch Tone number or digit on their telephone keypad at
the completion of their announcement.
3. UPON DETECTION OF SILENCE
PA2 is pre-programmed to automatically HANG UP the call after the
detection of 10 seconds of silence.
This is because some telephone systems (and some telephone lines
used with virtual P ABX solutions) may not output hang up tones at all.
You can change the detection parameters or disable this facility (refer
pages 9-1 1).
4. AFTER A FIXED PERIOD OF TIME
PA2 will automatically terminate a paging call after a programmable
length of time. The default connection time for PA2 is : 30 seconds.
This is a handy back up in case any of the above methods fails to take
place.
The default time can be set from 1 second to 99 hours (see page 9-1 1).
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LINE ISOLATION TRANSFORMER
PA2 is supplied with a High Quality Line Isolation Unit (LIU).
Do not attempt to connect any equipment to the PA SYSTEM port of
this unit without using the supplied Line Isolation Unit (LIU), or an
alternative ACMA approved Line Isolation Unit (LIU).
This device is designed to only operate when an LIU is connected.
PA2 will not answer or provide an audio connection, unless the LIU
input is connected to the two centre pins.
The SYSTEM port of the LIU has a modular (RJ11 6 pin) connector
which must connect to the PA SYSTEM Port of PA2 Switch, using the
supplied RJ11 to RJ11 cable.
The SOURCE port of the LIU has a modular (RJ 4 pin) connector which
should connect to the Public Address device, using one of the supplied
Audio Cables. One Audio cable has an RCA Audio plug and the other
has a 3.5mm Audio plug.
Do not use an alternative LIU unless you are advised to do so by National
Communications.
Use of an LIU is an ACMA SAFETY REQUIREMENT .
P A2 will not operate unless an LIU is connected to it.
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PROGRAMMING OPTIONS
PA2 Switch provides for FOUR separate User Programmable settings
(as detailed below), should they be needed. In most cases you will not
need to program PA2, as the default settings are likely to be suitable
for typical sites.
THE NUMBER OF RINGS BEFORE P A2 ANSWERS
You can set the number of rings before PA2 will answer incoming
calls and switch to the Paging Amplifier :
Allowable Range : 01 to 19 rings
Default Setting is : 2 rings
THE FIXED TIME DURATION OF A P AGING CALL
You can set a fixed CALL TIME in seconds (minutes or hours) that
will take place before P A2 will HANG UP.
Allowable Range : 01 t o 9 9
Default Setting is : 30 seconds
You can also change the Allowable Range from 01-99 seconds to
either : 01-99 minutes or 01-99 hours (see page 11, section B)
HANG UP TONE PARAMETERS
You can Disable or Delay Hang Up tone detection.
Set 00 if you wish to DISABLE Hang Up Tone detection
Set 01-99 to DELAY the start of Hang Up Tone detection for 01-99
seconds after the paging call is answered.
Allowable Range : 01 t o 9 9
Default Setting is : 10 seconds
SILENCE DETECTION P ARAMETERS
You can Disable or Set up Silence Detection.
Set 00 if you wish to DISABLE Silence detection
Set 01-99 to set the time of silence (secs) that will cause hang up.
Allowable Range : 01 t o 9 9
Default Setting is : 10 seconds
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PROGRAMMING PROCEDURE
In most cases you will not need to program P A2, as the default settings
are likely to be suitable for typical sites.
Should you need to program P A2, please follow the procedure below :
1. TURN OFF POWER TO YOUR PA2 UNIT
2. DISCONNECT THE LIU FROM PA2 SWITCH
PA2 will not program with the LIU connected.
3. CONNECT A STANDARD ANALOGUE TELEPHONE
(or a telephone buttinski) to the Programming port of P A2
4. TURN ON POWER TO YOUR PA2 UNIT
5. P A2 WILL OUTPUT 3 SHORT ‘BEEPS’
Do not proceed until you have heard 3 short beeps.
If you do not hear 3 beeps, return to the start (1).
6. ENTER THE REQUIRED SETTINGS :
As specified in sections A to D on page 11.
Note - You can change one or more settings in any order.
Note - You will hear a single ‘beep’ after each correct entry.
TO EXIT PROGRAMMING MODE - HANG UP.
ALL ENTRIES ARE SAVED IN PERMANENT MEMORY.
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PROGRAMMING PROCEDURE
A. NUMBER OF RINGS TO ANSWER
To enter the NUMBER OF RINGS press #1xx
where xx = number of rings and can be 01-19
(for example, press #105 for 5 rings)
B. MAXIMUM DURA TION OF THE PAGING CALL
To enter the MAXIMUM PAGING TIME press #2xx
where xx = number of seconds and can be 01-99
(for example, press #215 for 15 seconds)
If the Duration of the call needs to be more than 99
seconds, then you can change the duration as follows :
To change DURATION TIME to seconds press #31
To change DURATION TIME to minutes press #32
To change DURATION TIME to seconds press #33
(for example, to change to Minutes, press #32)
C. HANG UP TONE DETECTION
To DISABLE HANG UP TONE Detection; press #400
To DELAY HANG UP TONE Detection; press #4xx
where xx = number of seconds and can be 01-99
(for example, press #415 for 15 seconds).
D. SILENCE DETECTION
To DISABLE SILENCE Detection; press #500
To SET SILENCE Detection; press #5xx
where xx = number of seconds and can be 01-99
this is the total time in seconds that must be detected
before P A2 will Hang Up.
(for example, press #515 for 15 seconds)
SPECIFICATIONS
Dimensions(all i n m m ) : 106 (W) x 106 (D) x 43 (H)
Weight : 225g
Power Supply : 240VAC to 12V AC/500mA
Power Consump t io n : When Idle - 0.5 Watts
During Call - 0.75 Watts
Ringer Equivalence : 0.3 REN
Line Connectors : RJ 11 - 6 pin (2 centre)
LIU Connector : RJ 11 - 6 pin (2 centre)
Power Connector 2.5mm barrel connector
ACMA COMPLIANCE : Supplier Number N782
WARRANTY
This device is guaranteed against defects from workmanship for a period
of two years (24 months) from the date of purchase. In the event of
failure, you should return the product, along with proof of purchase date,
and a written statement about the nature of the problem.
This Warranty shall not apply to any unit which has been subject to
alteration, modification, abuse, negligence, accident, external voltage/
lightning surge or used in any manner contrary to these instructions.
The obligation is solely to repair or replace the product. The warrantor
is not liable for any incidental or consequential damages due to such
defects.
The user is responsible for freight costs to the repair point. The warrantor
will be responsible for freight costs in returning this unit back to the
user.
Damage caused to this device or attached equipment, by lightning strikes
or over voltage surge is not covered under this warranty .
CASE SEALED AT FACTORY
OPENING THE CASE VOIDS THE WARRANTY
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