Optical Systems Design OSD732T User manual

OPERATOR MANUAL
OSD732T AND OSD732R
FIBER OPTIC TELEPHONE
TRANSMISSION SYSTEM

OPTICAL SYSTEMS DESIGN
DOC ID: 10105711
OSD732 OPERATOR MANUAL
Page 3 of 16
INDEX 1
1 TECHNICAL SUMMARY........................................................................................................4
1.1 BRIEF DESCRIPTION............................................................................................................4
1.1.1 Overview...............................................................................................................................4
1.1.2 Applications..........................................................................................................................4
1.1.3 Features and benefits............................................................................................................4
1.2 TYPICAL CONFIGURATION................................................................................................5
1.3 PRODUCTS AND OPTIONS ..................................................................................................5
1.4 TECHNICAL SPECIFICATIONS...........................................................................................6
2 INSTALLATION AND OPERATION.....................................................................................7
2.1 INTRODUCTION....................................................................................................................7
2.2 INSTALLATION.....................................................................................................................7
2.2.1 Warning and Precautions.....................................................................................................7
2.2.2 Packaging.............................................................................................................................8
2.2.3 Power supply connections ....................................................................................................9
2.2.4 Other connections...............................................................................................................10
2.3 OSD732 OPERATION...........................................................................................................11
2.3.1 OSD732 Telephone Call Operation....................................................................................11
2.3.2 TELEPHONE TO TELEPHONE INTERCOM OPERATION*...........................................12
2.3.3 TIP & RING POLARITY REVERSAL*...............................................................................12
2.3.4 OSD732T............................................................................................................................ 13
2.3.5 OSD732R............................................................................................................................14
2.3.6 Indicators............................................................................................................................14
3 MAINTENANCE......................................................................................................................15
3.1 INTRODUCTION..................................................................................................................15
3.2 EXTERNAL INSPECTION...................................................................................................15
3.3 ROUTINE MAINTENANCE.................................................................................................15
4 WARRANTY............................................................................................................................16
4.1 WARRANTY PERIOD..........................................................................................................16
4.2 REPAIRS................................................................................................................................16
4.2.1 Warranty Repairs ...............................................................................................................16
4.2.2 Out-of-Warranty Repairs....................................................................................................16
4.2.3 Site Repairs.........................................................................................................................16
4.2.4 Exclusions...........................................................................................................................16
FIGURE 1: TYPICAL CONFIGURATION.............................................................................................................. 5
FIGURE 2: OSD732 DIMENSIONS......................................................................................................................... 8
FIGURE 3: OSD732 POWER SUPPLY CONNECTION......................................................................................... 9
FIGURE 4: OSD732 OTHER CONNECTIONS..................................................................................................... 10
FIGURE 5: RJ11 PINOUT CONFIGURATION..................................................................................................... 11
FIGURE 6: TELEPHONE TO TELEPHONE INTERCOM ................................................................................... 12
FIGURE 7: OSD732T BLOCK DIAGRAM ........................................................................................................... 13
FIGURE 8: OSD732R BLOCK DIAGRAM ........................................................................................................... 14
TABLE 1: PRODUCTS AND OPTIONS.................................................................................................................. 5
TABLE 2: TECHNICAL SPECIFICATIONS........................................................................................................... 6
TABLE 3: DC POWER CONNECTION .................................................................................................................. 9
TABLE 4: OSD732 INDICATORS......................................................................................................................... 14

OPTICAL SYSTEMS DESIGN
DOC ID: 10105711
OSD732 OPERATOR MANUAL
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1TECHNICAL SUMMARY
1.1 BRIEF DESCRIPTION
1.1.1 OVERVIEW
The OSD732 is a high performance fully digital fiber optic interface for links between a PABX and any
touchtone telephone. It is designed for applications such as PABX/Line extension between buildings or
to a remote location (e.g. from a central control room to a security guard post) where only one or a few
telephones are required. A typical application example could be the emergency telephone systems of
highways or other ITS (Intelligent Transportation System) applications. The OSD732 can also be used
to connect any two touchtone telephones to form a dedicated intercom system.
The OSD732 is available with common optical fibers operating at wavelengths of 850nm, 1300nm or
1550nm. Both multimode or singlemode versions are available to suit different application
requirements. The longest transmission distance supported by the OSD732 is 5km on multimode fiber
or 50km over singlemode fiber. The unit can be supplied with 1 or 4 telephone interfaces.
The OSD732 is available in two types of package: a standalone module or a card which can be installed
into a standard OSD370 19” rack-mount chassis.
1.1.2 APPLICATIONS
▲ Line/PABX–Telephone Links
▲ Telephone-Telephone Intercom Links
▲ ITS Emergency Telephone system
▲ PABX Extension for Remote
Locations
▲ Secure networks
1.1.3 FEATURES AND BENEFITS
▲ Interfaces with any touchtone or
decadic dialling telephone and PABX
systems.
▲ Available with 1or 4 telephone
interfaces.
▲ Duplex communication on one or two
optical fibers.
▲ A-Tick Compliant
▲ Operates with both singlemode and
multimode fibers over up to 50km.
▲ Available in both standalone module
or rack-mount card.
▲ Fully digital transmission.

OPTICAL SYSTEMS DESIGN
DOC ID: 10105711
OSD732 OPERATOR MANUAL
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1.2 TYPICAL CONFIGURATION
Figure 1 shows a typical set-up for an OSD732 pair.
FIGURE 1: TYPICAL CONFIGURATION
1.3 PRODUCTS AND OPTIONS
There are various options available for the OSD732 as identified in Table 1 below:
TABLE 1: PRODUCTS AND OPTIONS
ITEM DESCRIPTION
OSD732T Telephone interface module for telephone end of link
OSD732R Telephone interface module for exchange end of link
ITEM DESCRIPTION
OPTION C Module Version
OPTION L 1310nm and/or 1510nm singlemode option
OPTION W Single fiber operation
OPTION 2A Two channel version
OPTION 4A Four channel version
Telephone
Handsets
OSD732T
Tx
Rx
Fiber Interface
Trunk
Lines
Audio
I/O
Audio
I/O
Audio
I/O
Audio
I/O
MUX
OSD732R
Tx
Rx
Audio
I/O
Audio
I/O
Audio
I/O
Audio
I/O
MUX
Telephone Exchange
or PABX

OPTICAL SYSTEMS DESIGN
DOC ID: 10105711
OSD732 OPERATOR MANUAL
Page 6 of 16
1.4 TECHNICAL SPECIFICATIONS
TABLE 2: TECHNICAL SPECIFICATIONS
SPECIFICATION PERFORMANCE
Audio Bandwidth 150Hz to 6kHz
Signal to Noise Ratio (SNR) > 70dB
Input/Output Impedance 600Ω
Optical Signal Wavelength 850nm (OSD732) or 1310nm (OSD732L)
Coupled Transmit Power -13 to –10dBm into 62.5/125 multimode fiber (OSD732)
-13 to –10dBm into 9/125 singlemode fiber (OSD732L)
Receiver Sensitivity for 1x10
-9
BER < -40dBm
Receiver Saturation > -10dBm
Optical Link Budget and Transmission
Distance >27dB: >8km on multimode fiber
>70km on singlemode fiber
Ring Voltage 70VAC on –24VDC bias
Telephone Connector RJ11
Optical Connector ST standard, others are optional
Operating Temperature -20°C to +75°C
Relative Humidity 0 to 95% non-condensing
Power Requirements +9V to 24V
DC
@ 6VA
Indicators Rx optical Signal OK
Laser OK
Dimensions (mm)
104W x 157D x 53H (module)
25W x 208D x 100H (card)
Weight
0.4kg (Module)
0.2kg (card)
Chassis Current Consumption (CCC) 0.3 Amp (1Channel)
0.5 Amp (4 Channel)
10273207

OPTICAL SYSTEMS DESIGN
DOC ID: 10105711
OSD732 OPERATOR MANUAL
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2INSTALLATION AND OPERATION
2.1 INTRODUCTION
This section outlines the methods required to install and operate the OSD732T and OSD732R
successfully. It should be studied carefully if damage to the equipment or poor results are to
be avoided.
This equipment has been fully tested prior to dispatch and is ready for immediate operation.
However it is advisable to check for external transportation damage before operation. If
damage is evident, return the unit with the packaging to your supplier immediately.
2.2 INSTALLATION
2.2.1 WARNING AND PRECAUTIONS
▲ ELECTROMAGNETIC COMPATIBILITY
WARNING: This is a Class A product. In a domestic environment this product may cause radio
interference in which case the user may be required to take adequate measures.
▲ OPTICAL OUTPUT OPERATION
WARNING: Laser Safety: Class 1 Laser Product per IEC/EN 60825-1:20011 standard.
Class 1
The OSD732 is a Class 1 laser product.
PRECAUTIONS
▲ All service personnel should be provided training as to the hazards of direct viewing of laser
radiation and of the precautionary measures during servicing of equipment
▲ Areas where laser products are installed should be restricted in access to trained service
personnel only and appropriate warning signs posted in the work area.
▲ All laser apertures should be covered by protective covers when not connected to optical
fibers. Never leave outputs uncovered.
▲ Laser equipment should be positioned above or below eye level where possible. Apertures
should be positioned away from personnel.
▲ Protective eyewear should be worn in the vicinity of laser equipment.
CAUTION: When installing in the OSD370 chassis ensure that it is connected to a
socket outlet with a protective earth connection. This equipment will be inoperable
when mains power fails .

OPTICAL SYSTEMS DESIGN
DOC ID: 10105711
OSD732 OPERATOR MANUAL
Page 8 of 16
2.2.2 PACKAGING
The OSD732TC and OSD732RC are designed to be mounted on an even surface and to be secured by
means of M4 or smaller screws.
The OSD732T and OSD732R card versions are designed to be inserted into a chassis and secured by
means of captivated screws.
(a) Module Version
(b) Card Version
FIGURE 2: OSD732 DIMENSIONS
DETAIL 'A'
4.2
6.6
8.5
DETAIL ‘A’
106
116
157
104
128
53
210
100
25

OPTICAL SYSTEMS DESIGN
DOC ID: 10105711
OSD732 OPERATOR MANUAL
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2.2.3 POWER SUPPLY CONNECTIONS
The OSD732 requires external DC power. The voltage range of the OSD732 is +9V to +24V @ 6VA.
Power is connected to the socket located at the back of the case. DC power should be connected as
indicated in Table 3.
DC power in the OSD732 card version is connected via a DB9 connector. Power is supplied by the
OSD370 or OSD350 chassis which can be plugged in or out of the chassis with power on or off.
TABLE 3: DC POWER CONNECTION
External Power Pin Specification
Pin 1 +9Vto +24 DC
Pin 2 Ground
FIGURE 3: OSD732 POWER SUPPLY CONNECTION
Pin 2
Pin 1

OPTICAL SYSTEMS DESIGN
DOC ID: 10105711
OSD732 OPERATOR MANUAL
Page 10 of 16
2.2.4 OTHER CONNECTIONS
FIGURE 4: OSD732 OTHER CONNECTIONS
The optical fiber cable must be terminated with the appropriate optical connector. Before connection,
inspect the ends of the connectors to ensure that no dust or dirt is present as it could contaminate the
modem connector and result in poor performance.
If it is necessary to clean the cable connectors use isopropyl alcohol and lint free tissue to remove
contamination.
Line 4
Line 3
Line 2
Line 1
Optical O/P
Optical I/P
Laser OK LED
Receive OK LED
Laser OK LED
Receive OK LED
Optical I/P
Optical O/P
Line 4
Line 3
Line 2
Line 1

OPTICAL SYSTEMS DESIGN
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OSD732 OPERATOR MANUAL
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2.3 OSD732 OPERATION
2.3.1 OSD732 TELEPHONE CALL OPERATION
This section applies to both the OSD732T and OSD732R.
When a handset is connected to the OSD732T and an exchange or PABX line is connected to the
OSD732R, a conventional telephone circuit is established.
If the handset connected to the OSD732T is in the "OFF HOOK" state, the trunk line at the OSD732R
end is switched into its active state, thus informing the exchange that the handset is “OFF HOOK”. The
exchange feeds a dial tone via the fiber modems to the handset so that the user can then dial the
required number. Either tone or decadic loop disconnect signalling can be used.
The exchange network or PABX connects the two handsets once the distant handset is picked up and
breaks down the connection when either party hangs up following standard telecommunications practice.
An incoming call to the handset is first detected by the OSD732R as a ringing signal. The frequency
and cadence of this signal is transferred to the OSD732T which generates a similar ring signal and
feeds this to the handset. The OSD732T detects when the user picks up the handset and transfers this
information to the remote OSD732R which sets the attached trunk line to the active state. This causes
the initiating exchange or PABX to stop the ring signal and a two-way conversation can then start.
Figure 5 below illustrates the RJ11 connection
FIGURE 5: RJ11 PINOUT CONFIGURATION
1 2 3 4 5 6
1 – N/C
2 – N/C
3 – TIP
4 – RING
5 – N/C
6 – N/C

OPTICAL SYSTEMS DESIGN
DOC ID: 10105711
OSD732 OPERATOR MANUAL
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2.3.2 TELEPHONE TO TELEPHONE INTERCOM OPERATION*
Figure 6 indicates how to connect the OSD732 as Telephone to Telephone Intercom connection.
Intercom mode is activated automatically when two OSD732T's are connected back-to-back. Intercom
mode operates as follows:
1. Handset A or B goes off-hook, a ringtone should start on handset B or A respectively.
2. Handset B or A goes off-hook, the ringtone should stop and audio communication between handset
A and B is possible.
3. Handset A and/or B go back on-hook, the communication is stopped and the system resets.
Note: For 4 channel OSD732 versions, the handsets will communicate through the corresponding
channels (ie Ch1 to Ch1, Ch2 to Ch2, etc)
FIGURE 6: TELEPHONE TO TELEPHONE INTERCOM
2.3.3 TIP & RING POLARITY REVERSAL*
The standard method to transport voice between two telephone sets is to use tip and ring lines. Tip and
ring lines are the twisted pair of wires that connect to your phone by way of an RJ−11 connector (see
Figure 5 for pin configuration). The tip and ring lines are also used for polarity reversal which is used
in a number of examples;
1. A ringing tone is a 20-25Hz toggled signal which produces the ring tone
2. Some countries require Caller Line ID signalling where polarity reversal precedes the
transmission of data before the ringing signal.
3. Some systems require reversal of polarity to indicate far end answer eg coin operated phones.
In the case where Tip and Ring reversal is encountered at one end (eg OSD732R), the distant OSD732
(eg OSD732T) will transfer the polarity reversal over the fiber link providing system integrity.
*Note: This feature is only available on units with serial numbers 10004506 and higher.
Single Fiber WDM
Or Dual Fiber
OSD732T
OSD732T
Handset
A
Handset
B
Ch1
Ch1

OPTICAL SYSTEMS DESIGN
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OSD732 OPERATOR MANUAL
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2.3.4 OSD732T
Figure 7 is a block diagram of the OSD732T.
When using the OSD732T for the first time, check that the unit is in good condition with no
visible damage.
If a card version is used, insert it in an appropriate slot on the OSD chassis and check that the indicators
illuminate accordingly on power up. If a module version is used, connect the unit to an appropriate
power source and check that the indicators illuminate accordingly on power up.
In either case take special note of the “Laser OK” indicator, it should be "Off". If it is red there may be
a problem with the laser. Disconnect power and have the Laser checked as soon as possible.
Finally, plug in the optical connectors of the optical cable. If the remote OSD732R is connected, the
"Receive OK" LED will change from Red to Green.
Ensure that the correct signals are connected to the correct pins of the RJ11 connector as specified in
Figure 5.
FIGURE 7: OSD732T BLOCK DIAGRAM
Protection
Circuit
Ringing
Subscriber
Interface
Circuit
ADC
DAC
MUX/
DEMUX
On/Off Hook Flag
Ring Signal
SLIC Control
Optical
Receiver
Optical
Transmitter
Optical
Output
Optical
Input
To PABX
or
Telephone
Line
Audio Tx
Audio Rx

OPTICAL SYSTEMS DESIGN
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OSD732 OPERATOR MANUAL
Page 14 of 16
2.3.5 OSD732R
Figure 8 is block diagram of the OSD732R.
When using an OSD732R for the first time check that the unit is in good condition with no
visible damage.
If a card version (OSD732R) is used, insert it in an appropriate slot on the OSD chassis and check that
the indicators illuminate accordingly. If a module version (OSD732RC) is used, connect the unit to an
appropriate power source and check that the indicators illuminate accordingly.
The “Laser OK” indicator LED should be "Off" in both Card and Case Versions, if the LED is red
there may be a problem with the laser. Disconnect power and have the Laser checked as soon as
possible.
Connect the optical cable: if adequate optical power is received and signal is locked the “Receive OK"
indicator will change from ‘red’ to ‘green’.
FIGURE 8: OSD732R BLOCK DIAGRAM
2.3.6 INDICATORS
TABLE 4: OSD732 INDICATORS
INDICATOR COLOUR FUNCTION
LD - Laser OK Off
Red OK Fail
RCV - Receive Signal OK Green
Red OK Fail
Protection
Circuit
Trunk
Interface
Circuit
ADC
DAC
MUX/
DEMUX
Ring Signal
On/Off Hook Flag
SLIC Control
Optical
Receiver
Optical
Transmitter
Optical
Output
Optical
Input
To PABX
or
Telephone
Line
Audio Tx
Audio Rx

OPTICAL SYSTEMS DESIGN
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OSD732 OPERATOR MANUAL
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3MAINTENANCE
3.1 INTRODUCTION
The following section outlines the fault-finding procedure for the OSD732T and OSD732R modems.
Please take note of the following:
▲ Personnel without appropriate training should not attempt any maintenance except that
outlined below.
▲ If further maintenance is attempted you are warned that every care should be taken to ensure
that internal measurements made while the equipment is operational are taken carefully as
some components within the unit are expensive and may be damaged by failure of any portion
of their support circuitry.
▲ Some components within the unit are ES sensitive and ESD precautions should be taken when
performing maintenance upon the unit.
3.2 EXTERNAL INSPECTION
Visually check for the following:
▲ Check that the correct power source is connected to the power socket.
▲ Check that the data signals are connected to the modem correctly and that the distant
OSD732T or OSD732R modem has been terminated correctly to any external equipment.
▲ Inspect the optical connectors for any contamination and clean using isopropyl alcohol and a
lint free tissue if any contamination is detected.
▲ Check that any external termination resistors are connected if the system configuration
requires them.
3.3 ROUTINE MAINTENANCE
▲ There is no routine maintenance required with the OSD732T and OSD732R.

OPTICAL SYSTEMS DESIGN
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OSD732 OPERATOR MANUAL
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4WARRANTY
Thank you for purchasing equipment designed, manufactured and serviced by Optical Systems Design
(OSD). OSD warrants that at the time of shipment, its products are free from defects in material and
workmanship and conforms to specifications. Our Warranty conditions are outlined below:
4.1 WARRANTY PERIOD
For warranty period, please call your local OSD distributor.
4.2 REPAIRS
Optical Systems Design reserves the right to repair or replace faulty modules/units. Please obtain a
“Return Material Authorisation” (RMA) form and number before returning goods. DATA INPUT IN
Goods must be returned in adequate packing material to Optical Systems Design, Warriewood or its
nominated authorised representative, for all repairs.
4.2.1 WARRANTY REPAIRS
Return shipments to OSD shall be at customer's expense and freight back to the customer will be at
OSD expense.
4.2.2 OUT-OF-WARRANTY REPAIRS
OSD reserves the right to repair or replace any faulty goods. Freight costs and insurance for both
journeys are met by the user. All equipment repaired by OSD will have a 3-Month Warranty from the
date of dispatch.
4.2.3 SITE REPAIRS
By agreement site repairs may be undertaken for which out of pocket, hotel and travel expenses will be
charged.
4.2.4 EXCLUSIONS
This warranty does not apply to defects caused by unauthorized modifications, misuse, abuse or
transport damage to the equipment. All modifications to OSD’s standard product will need written
authorization and will be charged at normal repair rates. All modifications are to be carried out by OSD
Technicians. Warranty is void if unauthorized removal and/or tampering with serial number and/or
repair labels is evident.

Optical Systems Design Pty. Ltd.
7/1 Vuko Pl. Warriewood 2102
P.O. Box 891 Mona Vale
N.S.W. Australia 2103
Telephone: [phone]
Facsimile: [phone]
Email: [e-mail]
Web Site: www.osd.com.au
OPTIC L
SYSTEMS
DESIGN
PTY LTD A.B.N. 83 003 020 504
Printed in Australia