LPN SafeTLink User manual

LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A.
Tel: [phone] •Fax: [phone] •E-mail: [e-mail]
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User Manual
SafeTLink
4.9 GHz Public Safety Band
Point-to-Point Microwave Radio
System
Ethernet plus T1
or
1, 2, 4 x T1
Document Number: 800-00020-01
Revision: Draft 10
Revision Date: August 13, 2004

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
Tel: [phone] •Fax: [phone] •E-mail: sale[email protected]m
2 of 76
Table of Contents
1INTRODUCTION........................................................................................5
1.1 General Overview of Point to Point Wireless Links ....................................6
1.2 User Manual Conventions..........................................................................7
2LICENSE REQUIREMENTS AND REGULATORY COMPLIANCE ..........7
2.1 FCC Compliance Statement.......................................................................7
2.2 Modifications Prohibited .............................................................................8
2.3 International Operation...............................................................................8
2.4 Safety Considerations ................................................................................8
2.4.1 RF Energy Precautions.................................................................8
2.4.2 Tower Safety Precautions.............................................................9
2.4.3 Grounding .....................................................................................9
3SYSTEM DESCRIPTION .........................................................................10
3.1 System Configurations .............................................................................10
3.1.1 Ethernet plus T1 .........................................................................10
3.1.2 1, 2, 4 x T1..................................................................................10
3.1.3 1, 2, 4 x E1..................................................................................10
3.2 System Components................................................................................11
3.2.1 ODU Description.........................................................................11
3.2.2 IDU Description...........................................................................11
3.3 Specifications ...........................................................................................13
3.3.1 Specifications for the Ethernet + T1 SafeTLink...........................13
3.3.2 Specifications for the 4 x T1 SafeTLink ......................................14
4ENGINEERING AND PLANNING............................................................16
4.1 System Configuration...............................................................................16
4.1.1 General.......................................................................................16
4.1.2 SafeTLink with both ODU and IDU .............................................18
4.1.3 SafeTLink with ODU only............................................................20
4.2 Powering ..................................................................................................21
4.2.1 System Requirements ................................................................21
4.2.2 IDU Powering and Fusing...........................................................21
4.2.3 Power Failure Recovery .............................................................21
4.3 Grounding ................................................................................................21
4.4 Mechanical ...............................................................................................22
4.4.1 ODU............................................................................................22
4.4.2 IDU .............................................................................................23
4.5 Frequency Selection ................................................................................23
4.5.1 1 MHz Operation Channel Plan ..................................................24
4.5.2 2 MHz Operation Channel Plan ..................................................25
4.5.3 5 MHz Operation Channel Plan ..................................................25
4.6 Pre-Installation Considerations ................................................................26
4.7 Antenna Path Guidelines..........................................................................26
4.8 Path Planning, Analysis and Measurement, Link Budget.........................26

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
Tel: [phone] •Fax: [phone] •E-mail: sale[email protected]m
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4.8.1 Receive Signal Level Calculation................................................26
4.8.2 Fade margin calculations............................................................27
4.8.3 Sample Link Budget Calculation .................................................27
4.9 Achievable Distances...............................................................................28
4.9.1 1 MHz RF Channels ...................................................................28
4.9.2 2 MHz RF Channels ...................................................................29
4.9.3 5 MHz RF Channels ...................................................................29
4.10 Antenna Selection ....................................................................................29
4.11 Approved Antennas..................................................................................30
4.12 Integrated Antenna Polarization ...............................................................30
5INSTALLATION.......................................................................................30
5.1 Tools and Test Equipment .......................................................................30
5.2 Site Preparation .......................................................................................31
5.3 Outdoor Installation Procedures...............................................................31
5.3.1 Antenna Installation ....................................................................31
5.3.2 ODU Mechanical Installation.......................................................31
5.3.3 IDU Mechanical Installation ........................................................32
5.4 Electrical Connections..............................................................................36
5.4.1 With Ethernet plus T1 IDU ..........................................................36
5.4.2 With 4xT1 IDU ............................................................................37
5.4.3 Without IDU ................................................................................38
5.5 Grounding ................................................................................................39
5.5.1 ODU............................................................................................39
5.5.2 IDU .............................................................................................39
5.6 RF Connections .......................................................................................39
5.7 Changing Integrated Antenna Polarization...............................................40
5.8 Antenna Alignment...................................................................................40
5.8.1 Optical Alignment........................................................................41
5.8.2 Maximizing the Received Signal Level .......................................41
5.9 Initial System Tests ..................................................................................43
6CONFIGURATION AND MONITORING..................................................43
6.1 Introduction to What Can be Configured and Monitored ..........................43
6.1.1 Local ...........................................................................................43
6.1.2 Remote .......................................................................................44
6.2 Configuration Options ..............................................................................44
6.2.1 Configuration of “A” or “B” type ODU ..........................................44
6.3 Using the Command Language Interface.................................................46
6.3.1 Command Line Interface Introduction.........................................46
6.3.2 Direct CLI Use at the ODU..........................................................46
6.3.3 CLI Use via the IDU ....................................................................47
6.3.4 CLI Commands...........................................................................47
6.3.5 CLI Register Commands and Replies.........................................47
6.3.6 Error Messages ..........................................................................48
6.3.7 Status Byte .................................................................................48
6.3.8 Register Command Details .........................................................48

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
Tel: [phone] •Fax: [phone] •E-mail: sale[email protected]m
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6.4 Using the LPN Wireless GUI ....................................................................52
6.4.1 GUI Host PC Requirements........................................................53
6.4.2 GUI Overview .............................................................................53
6.4.3 GUI Configuration Page..............................................................53
6.4.4 GUI Status Page.........................................................................60
6.4.5 GUI Setup Page..........................................................................64
6.4.6 GUI Terminal Page .....................................................................65
6.5 IDU Monitoring .........................................................................................66
6.5.1 Ethernet plus T1 IDU Visual Indicator Lights ..............................66
6.5.2 4xT1 IDU Visual Indicator Lights.................................................67
6.5.3 IDU Alarm Cut-Off Switch ...........................................................68
6.6 SNMP.......................................................................................................68
7ROUTINE PREVENTATIVE MAINTENANCE .........................................68
8TROUBLESHOOTING AND SERVICING ...............................................68
8.1 Identification of problems .........................................................................68
8.2 Field Service items...................................................................................68
8.2.1 List of What Can be Done in the Field ........................................68
8.3 Matrix of Problems and Troubleshooting..................................................68
8.4 Accessing the ODU..................................................................................69
8.4.1 Antenna Removal --- ODU with integral antenna.......................69
8.4.2 Cover Removal --- ODU without antenna ..................................69
8.4.3 Duplexer Removal ......................................................................70
8.4.4 Duplexer Mounting Plate Removal .............................................70
8.4.5 Digital Electronics Package Access............................................70
8.4.6 RF Board Access........................................................................71
8.4.7 Reassembly ................................................................................72
8.4.8 RF Cable Details.........................................................................72
8.5 Repair Depot Items ..................................................................................72
8.5.1 Items that can ONLY be repaired at depot..................................72
8.5.2 RMA procedure...........................................................................72
9GLOSSARY OF TERMS..........................................................................72
APPENDIX I: ETHERNET PLUS T1 ODU AND IDU INTERFACE
CONNECTOR PIN DESCRIPTION ....................................................................75
APPENDIX II: 4XT1 ODU AND IDU INTERFACE CONNECTOR PIN
DESCRIPTION ...................................................................................................76

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
Tel: [phone] •Fax: [phone] •E-mail: sale[email protected]m
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1 INTRODUCTION
The LPN Wireless SafeTLink 4.9 GHz Point-to-Point Microwave Radio is a
carrier-class broadband wireless link for data, voice, and video
telecommunication applications. The product line is specifically designed to
operate in the licensed 4940 to 4990 MHz Public Safety frequency band.
SafeTLink is available in two versions. The Ethernet plus T1 version transmits
both a 10/100 BaseT Ethernet input and a single T1 input between terminals.
The 4xT1 version multiplexes and transmits 1, 2 or 4 synchronous T1 inputs
between terminals.
The SafeTLink product family can be flexibly configured with terminals either
each as a stand-alone outdoor unit (ODU) or as a split system with an indoor unit
(IDU). The ODU houses all the Radio Frequency (RF) equipment in a compact
weather-tight enclosure. The ODU comes either with an integrated 1 foot square
antenna or with an “N” female connector for use with an external antenna. Either
the stand-alone ODU or the split system is fully controlled by a digital command
line interface or graphical user interface. The interconnections from the ODU to
the user, or to the IDU, are all via standard twisted-pair network cables. The
ODU can be located up to 660 feet (200 meters) from the indoor site.
SafeTLink radio links employ Frequency Division Multiplex (FDM, also known as
Frequency Division Duplex, FDD) radio transmission with dedicated bandwidth in
each direction. The SafeTLink supports connectivity to voice networks using an
industry standard T1 interface and connectivity to data networks by a standard
Ethernet interface.
The Ethernet plus T1 SafeTLink version can be configured to occupy a pair of 1,
2, or 5 MHz RF channels. The wider the RF channels, the higher the Ethernet
data rate. The T1 is user configurable as a fractional T1 with any number of
enabled time slots. Disabled time slot bandwidth is automatically reallocated to
the Ethernet channel.
The 4xT1 SafeTLink version can be configured to support 1, 2 or 4 T1 inputs.
Single T1 transmission requires a pair of 1 MHz RF channels. Two T1
transmission requires a pair of 2 MHz RF channels and four T1 transmission
requires either a pair of 3 MHz or pair of 5 MHz RF channels.

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
Tel: [phone] •Fax: [phone] •E-mail: sale[email protected]m
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Figure 1-1
ODU with Integrated Antenna
Mounted on a Mast
1.1 General Overview of Point to Point Wireless Links
Point-to-point wireless links allow the transmission of digital data or digitized
voice between two locations without the need for leased lines or a right-of-way.
The SafeTLink system is specifically designed to transport data with a minimum
of errors, providing a true carrier-class product. SafeTLink is ideal for backhaul
of Wi-Fi data, video transport, and WAN and PBX connections between facilities.
The basic SafeTLink point-to-point system design is shown in Figure 1-2.
Figure 1-2
SafeTLink System Block Diagram
Ethernet
plus T1
or
1,2,4xT1
Mana
g
ement
P
o
w
e
r
ODU A ODU B
Mana
g
ement
Power
Ethernet
plus T1
or
1,2,4xT1

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
Tel: [phone] •Fax: [phone] •E-mail: sale[email protected]m
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1.2 User Manual Conventions
Some material in this manual contains information of special importance. Such
information will be found in blocked sections with the following forms:
CAUTION
These sections contain information about items or operating conditions
that may cause difficulties in operation of the system.
WARNING!
These sections contain information about items or operating conditions
that may pose danger to installers, operators or users of the system.
2 LICENSE REQUIREMENTS AND REGULATORY
COMPLIANCE
2.1 FCC Compliance Statement
This equipment has been tested and found to comply with FCC part 90 subpart Y
requirements for intentional radiators. This equipment has also been tested and
found to comply with the limits for a Class B digital device, pursuant to part 15,
subpart B, of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference in a commercial or residential installation.
This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the user manual, may increase the
potential for harmful interference to radio communications. No modifications or
changes to this equipment are allowed, unless the changes or modifications are
expressly approved by the manufacturer. It is recommended that only shielded
cables be used to reduce interference whenever interference is suspected. If this
equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
Tel: [phone] •Fax: [phone] •E-mail: sale[email protected]m
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2.2 Modifications Prohibited
The SafeTLink system is certified as an intentional radiator. As required by FCC
regulations, part 15.21, the user is warned that: Changes or modifications to the
SafeTLink equipment not expressly permitted could void the user’s authority to
operate this equipment.
2.3 International Operation
The SafeTLink system is designed to be used only within the United States. LPN
Wireless does not warrant compliance with any international standards or
regulations.
2.4 Safety Considerations
The SafeTLink system equipment is designed and manufactured in compliance
with safety standard EN60950. Following these precautions will ensure personal
safety and prevent damage to the SafeTLink equipment or to other connected
equipment.
Note: Read and follow all warning notices and instructions marked
on the product or included in this guide.
The SafeTLink system should be installed by experienced professionals. If this
product was not purchased directly from LPN Wireless or an authorized dealer,
contact LPN Wireless for referral to a professional installer. Non-authorized
installation is in possible violation of FCC regulations.
DO NOT attempt to service the SafeTLink product as this will void the warranty.
Refer all servicing to an LPN Wireless Authorized Dealer.
Special cables, which may be required by the regulatory inspection authority for
the installation site, are the responsibility of the customer.
When installed in the final configuration, this product must comply with the
applicable safety standards and regulatory requirements of the geographic
location in which it is installed. If necessary, consult with the appropriate
regulatory agencies and inspection authorities to ensure compliance.
2.4.1 RF Energy Precautions

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
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WARNING!
There is no proven link between the low level of RF emitted by this
device to any type of injury or disease, however, it is recommended
that these precautions to minimize unnecessary RF exposure be
followed:
• Do not connect power to the ODU and do not install the cable
between the optional IDU and ODU until the antenna and ODU are
installed. This will prevent radiation from the antenna when people
are within close proximity.
• Do not install the antenna where it is possible for a person to stand
within five feet of the radiating side.
2.4.2 Tower Safety Precautions
WARNING!
All industry standard safety procedures must be followed when
working above ground, on a rooftop, or on a tower. Failure to follow
these procedures may result in serious injury or death.
2.4.3 Grounding
WARNING!
Every part of this microwave radio system, including antennas, must
be properly grounded. Grounding maximizes the system
performance, minimizes the chances of lightning damage, and helps
to ensure safety. Make sure ground connections are available for all
of the equipment before beginning the installation.

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
Tel: [phone] •Fax: [phone] •E-mail: sale[email protected]m
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3 SYSTEM DESCRIPTION
3.1 System Configurations
3.1.1 Ethernet plus T1
The Ethernet plus T1 SafeTLink system is a point-to-point radio link which can
transport both an industry standard 1.544 Mbps T1 signal and a 10/100BaseT
Ethernet signal. The actual data rate carried on the Ethernet interface is
dependent on several factors. The SafeTLink system uses frequency division
duplex and requires two RF channels, one for each direction of transmission.
The SafeTLink can be configured by the user to occupy a pair of 1 MHz RF
channels, a pair of 2 MHz RF channels or a pair of 5 MHz RF channels. The
wider the RF channels, the higher the Ethernet payload data rate. The T1
interface can be configured as a fractional T1, enabling any number of the 24
available 64 kbps time slots. SafeTLink reallocates the bandwidth from the
disabled T1 time slots to the Ethernet channel. The resulting full duplex Ethernet
data rates are as follows:
RF Channel
Width
Ethernet Data Rate Range
(dependent on fractional T1 usage)
1 MHz 0.4 to 2.0 Mbps (Full Duplex)
2 MHz 2.5 to 4.0 Mbps (Full Duplex)
5 MHz 10.7 to 12.2 Mbps (Full Duplex)
3.1.2 1, 2, 4 x T1
The 4xT1 SafeTLink system is a point-to-point radio link which can transport 1, 2
or 4 synchronous industry standard 1.544 Mbps T1 signals. The SafeTLink
system uses frequency division duplex and requires two RF channels, one for
each direction of transmission. The SafeTLink can be configured by the user to
transmit a single T1 in a pair of 1 MHz RF channels, two T1s in a pair of 2 MHz
RF channels or four T1s in either a pair of 5 MHz RF channels.
RF Channel
Width
Number of Available DS1 / T1
User Channels. Full Duplex:
1 MHz 1
2 MHz 2
5 MHz 4
3.1.3 1, 2, 4 x E1
The SafeTLink system can transport 1, 2 or 4 synchronous E1 (2048 kbps)
framed user interfaces. This feature is not supported in standard US SafeTLink
products.

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
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3.2 System Components
The SafeTLink system consists of two ends. Each end requires an Outdoor Unit
(ODU) which contains the radio and multiplexer equipment. Either or both ends
may connect to an Indoor Unit (IDU) which contains indicator lights, alarm inputs
and alarm relays as well as convenient places to terminate all cabling. The ODU
comes either with an integrated antenna or with capability to connect to an
external antenna.
3.2.1 ODU Description
The ODU is a weather-resistant housing containing all Radio Frequency (RF)
and digital electronics. The ODU is connected to a directional antenna that
communicates to a second ODU/antenna using RF energy. The SafeTLink ODU
is available either with an integrated directional antenna or with capability to
connect to an external antenna.
In the transmit direction, the ODU receives the T1 and Ethernet inputs (either
from the IDU, if provided, or from the communications network if an IDU is not
used), and multiplexes these signals into a single digital data stream. It then
modulates the data onto a baseband carrier signal using 16 QAM digital
modulation to achieve spectral efficiency and robust link performance. This
baseband signal is upconverted, filtered and amplified for transmission to the
antenna and the distant ODU.
Before transmission, the data stream is buffered, block-interleave coded, then
Reed-Solomon forward error correction (FEC) coding bits are added. The entire
data stream is modulated onto the RF carrier using 16 QAM mapping.
In the receive direction, the ODU receives the weak RF signals from the distant
end equipment. First, the ODU amplifies and filters the faint signals. Then the
ODU hardware demodulates the signal and demultiplexes the data stream into
T1 and Ethernet signals. Interfering signals are rejected both in the RF and
modem sections of the ODU. Transmission and reception are independent, and
full duplex. The air interface is frequency division multiplex (FDM).
The T1 and Ethernet interfaces provide industry standard signal levels and
formats. Both the T1 and Ethernet interfaces are protected against line surges or
short circuits.
3.2.2 IDU Description
The IDU is a rack mountable assembly which occupies 1U (1.75 inches) of
vertical rack space. The IDU provides the following functions:
•Industry standard connectors for termination of all SafeTLink system
cabling
•A series of colored LED lights which provide a visual indication of current
system performance

User Manual
SafeTLink Point-to-Point Microwave Radio System
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•Alarm relay contacts (1 form C each) for major and minor alarms
•Alarm cut-off switch
•External alarm inputs
The IDU may be mounted in either 19 inch or 23 inch racks and can be mounted
with the connectors located on either the front side or rear side of the rack. The
LED indicator lights and alarm cut-off switch appear on both sides of the IDU, so
these functions will appear on the front side of the rack regardless of orientation
of the connectors. The IDU may be flush-mounted with the front panel flush with
the relay rack, or recessed mounted with the front panel located about 5 inches
in front of the rack.
Figure 3-1 shows an IDU in its standard, as-shipped configuration with
connectors to the rear, 19 inch rack mounting and flush mount.
Figure 3-1
IDU, 19” Flush Mount with Rear Connectors

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
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3.3 Specifications
3.3.1 Specifications for the Ethernet + T1 SafeTLink
Typical Link Operational
Distance
With integrated antenna:
7.5 miles with 99.999% availability
12.5 miles with 99.99% availability
With external 2’ dish antenna:
13 miles with 99.999% availability
20 miles with 99.99% availability
Antenna Connector (on ODUs
without integrated antenna)
Type N Female
Antenna (on ODUs with
integrated antenna)
Physical Size 12 inches square by 1 inch deep (radome size)
Gain 20 dBi minimum
Polarization Shipped vertically polarized, may be
reconfigured to horizontal polarization
Transmitter Power +20 dBm at the antenna connector
Transmitter Attenuation Greater than 15 dB power adjustment available
Minimum Receive Level 1 MHz RF Channels: -89 dBm
2 MHz RF Channels: -86 dBm
5 MHz RF Channels: -81 dBm
Maximum Receive Level -30 dBm, up to +0 dBm input with no damage
Duplex Method Frequency Division Duplex
Modulation 16 QAM
Forward Error Correction Concatenated Reed-Solomon coding with
interleaving
Regulatory Compliance FCC Part 90. Unintentional emissions per FCC
part 15 for class B device
Network Management CLI, GUI, SNMP options
Local Control ASCII Command Line Interface 10/100BaseT
and RS-485
T1 Line Interface Diagnostics Near and Far-end T1 loopback, AIS generation,
215-1 BIST pattern test
T1 Line Interface
Digital Interface DSX-1 per Telcordia GR-499. Full or Fractional
T1. Any DS0 slot user selectable.

User Manual
SafeTLink Point-to-Point Microwave Radio System
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T1 connector 28-pin weather-resistant (shared with Ethernet,
management and power) on ODU
RJ-48 on IDU
T1 Line Coding AMI or B8ZS, selectable
T1 Line Buildout short or long, selectable
Ethernet Interface
Digital Interface 10/100BaseT per IEEE 802.3
Ethernet connector 28-pin weather-resistant (shared with T1,
management and power) on ODU
RJ-48 on IDU
Major and Minor Alarm Relay
Contacts (IDU required)
1 form C each, nominal switching load 1A at 30
VDC, 0.3A at 125 VAC, maximum switching
voltage 110 VDC, 125 VAC
External Alarm Inputs (IDU
required)
Contact closure
DC Power Input 24/48 VDC
option
18 to 75 VDC operating range, either polarity,
floating relative to ground
DC Power Input 12 VDC
option
9 to 18 VDC operating range, either polarity,
floating relative to ground
Power Dissipation 25 watts maximum
Operating Altitude 15,000 feet maximum
ODU Operating Environment -40 to +70 C, 0-100% humidity, weather
resistant, outdoor mounted
ODU Physical Dimensions 12 x 12 x 5 inches
IDU Operating Environment -40 to +70 C, 5-95% humidity, indoor mounted
IDU Physical Dimensions 19 or 23 inch rack mount, 1U high
3.3.2 Specifications for the 4 x T1 SafeTLink
Typical Link Operational
Distance
With integrated antenna:
7.5 miles with 99.999% availability
12.5 miles with 99.99% availability
With external 2’ dish antenna:
13 miles with 99.999% availability
20 miles with 99.99% availability
Antenna Connector (on ODUs
without integrated antenna)
Type N Female
Antenna (on ODUs with
integrated antenna)
Physical Size 12 inches square by 1 inch deep (radome size)

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
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Gain 20 dBi minimum
Polarization Shipped vertically polarized, may be
reconfigured to horizontal polarization
Transmitter Power +20 dBm at the antenna connector
Transmitter Attenuation Greater than 15 dB power adjustment available
Minimum Receive Level 1 MHz RF Channels: -89 dBm
2 MHz RF Channels: -86 dBm
5 MHz RF Channels: -81 dBm
Maximum Receive Level -30 dBm, up to +0 dBm input with no damage
Duplex Method Frequency Division Duplex
Modulation 16 QAM
Forward Error Correction Concatenated Reed-Solomon coding with
interleaving
Regulatory Compliance FCC Part 90. Unintentional emissions per FCC
part 15 for class B device
Network Management CLI, GUI, SNMP options
Local Control ASCII Command Line Interface 10/100BaseT
and RS-485
T1 Line Interface Diagnostics Near and Far-end T1 loopback, AIS generation,
215-1 BIST pattern test, independently
selectable for each active T1 channel
T1 Line Interface One, two or four T1 Interfaces, selected by user
control of RF Channel bandwidth
Digital Interface DSX-1 per Telcordia GR-499.
T1 connector 28-pin weather-resistant (shared with
management and power) on ODU
RJ-48 on optional IDU
T1 Line Coding AMI or B8ZS, selectable for each T1 channel
T1 Line Buildout short or long, selectable for each T1 channel
T1 Clocking All T1 clock sources are synchronous.
User selection of clock source at either end of
the SafeTLink system.
Major and Minor Alarm Relay
Contacts (IDU required)
1 form C each, nominal switching load 1A at 30
VDC, 0.3A at 125 VAC, maximum switching
voltage 110 VDC, 125 VAC
External Alarm Inputs (IDU
required)
Contact closure
DC Power Input 24/48 VDC
option
18 to 75 VDC operating range, either polarity,
floating relative to ground

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
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DC Power Input 12 VDC
option
9 to 18 VDC operating range, either polarity,
floating relative to ground
Power Dissipation 25 watts maximum
Operating Altitude 15,000 feet maximum
ODU Operating Environment -40 to +70 C, 0-100% humidity, weather
resistant, outdoor mounted
ODU Physical Dimensions 12 x 12 x 5 inches
IDU Operating Environment -40 to +70 C, 5-95% humidity, indoor mounted
IDU Physical Dimensions 19 or 23 inch rack mount, 1U high
4 ENGINEERING AND PLANNING
4.1 System Configuration
4.1.1 General
SafeTLink is a point-to-point radio system available in two versions. The
Ethernet plus T1 version transports an Ethernet channel and one T1 channel
between the two endpoints. The 4xT1 version transports 1, 2 or 4 T1 channels
between the two endpoints. A link always consists of two ends, each with an
Outdoor Unit (ODU). A link requires an “A” Outdoor Unit (A ODU) at one end
and a “B” Outdoor Unit (B ODU) at the other end. Each ODU contains the radio
and multiplexer equipment and may be equipped with an optional integrated
antenna. Either or both ODUs may connect to an Indoor Unit (IDU) which
contains indicator lights, alarm inputs and alarm relays as well as convenient
places to terminate all cabling. Each ODU must either be equipped with an
integrated antenna or be connected to an external antenna.
A SafeTLink system requires an A ODU and a B ODU. The “A” ODU transmit
channel is selectable within the frequency band 4980-4990 MHz, its receive
channel is within 4940-4950 MHz. The “B” ODU is opposite with its transmit
channel selectable within the frequency band 4940-4950 MHz, its receive
channel is within 4980-4990 MHz. The required system component part
numbers are listed below:

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
Tel: [phone] •Fax: [phone] •E-mail: sale[email protected]m
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Part number Description
Number
Required
Ethernet plus T1
Systems:
STL-A-ETH-EXT-48 A ODU, External Antenna, 24/48 VDC
STL-A-ETH-EXT-12 A ODU, External Antenna, 12 VDC
STL-A-ETH-INT-48 A ODU, Internal Antenna, 24/48 VDC
STL-A-ETH-INT-12 A ODU, Internal Antenna, 12 VDC
1
STL-B-ETH-EXT-48 B ODU, External Antenna, 24/48 VDC
STL-B-ETH-EXT-12 B ODU, External Antenna, 12 VDC
STL-B-ETH-INT-48 B ODU, Internal Antenna, 24/48 VDC
STL-B-ETH-INT-12 B ODU, Internal Antenna, 12 VDC
1
300-00012-01 ODU/IDU Cable, 200 ft
300-00013-01 ODU/IDU Cable, 300 ft 1
500-00022-01 CDROM, GUI Software and Manual 1
4xT1 Systems:
STL-A-4T1-EXT-48 A ODU, External Antenna, 24/48 VDC
STL-A-4T1-EXT-12 A ODU, External Antenna, 12 VDC
STL-A-4T1-INT-48 A ODU, Internal Antenna, 24/48 VDC
STL-A-4T1-INT-12 A ODU, Internal Antenna, 12 VDC
1
STL-B-4T1-EXT-48 B ODU, External Antenna, 24/48 VDC
STL-B-4T1-EXT-12 B ODU, External Antenna, 12 VDC
STL-B-4T1-INT-48 B ODU, Internal Antenna, 24/48 VDC
STL-B-4T1-INT-12 B ODU, Internal Antenna, 12 VDC
1
300-00014-01 ODU/IDU Cable, 200 ft
300-00015-01 ODU/IDU Cable, 300 ft 1
500-00022-01 CDROM, GUI Software and Manual 1

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
Tel: [phone] •Fax: [phone] •E-mail: sale[email protected]m
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In addition to the required system components, a number of optional items are
available for use in a SafeTLink system. These are listed below:
Part Number Description
STL-IDU-ETH IDU, Ethernet plus T1
STL-IDU-4T1 IDU, 4xT1
500-00015-01 Antenna, 1 ft panel, 21 dBi gain
500-00016-01 Antenna, 2 ft dish, 27 dBi gain
500-00017-01 Antenna, 3 ft dish, 31 dBi gain
500-00018-01 Antenna, 4 ft dish, 33 dBi gain
500-00019-01 Antenna, 40 deg. horn, 12 dBi gain
300-00009-01 Antenna Coaxial Cable, 3 feet
300-00010-01 Antenna Coaxial Cable, 6 feet
300-00011-01 Antenna Coaxial Cable, 10 feet
500-00020-01 Lightning Arrestor for Coaxial cable
500-00022-01 120 VAC/48 VDC Power Adapter
500-00023-01 User Manual, Paper Copy
4.1.2 SafeTLink with both ODU and IDU
Either end or both ends of a SafeTLink system may be equipped with an Indoor
Unit (IDU). The IDU is used to terminate all required cabling and provides status
indicator lights, external alarm inputs and alarm relay contacts.
One end of a SafeTLink system configured with an IDU is shown in Figure 4-1.

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
Tel: [phone] •Fax: [phone] •E-mail: sale[email protected]m
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Figure 4-1
ODU with IDU
Figure 4-1 shows the ODU with an external antenna. ODUs equipped with an
integrated antenna do not require a separate antenna or antenna cable.
For this configuration, the following items are required:
•ODU
•IDU
•ODU/IDU Cable
•Antenna Cable (if external antenna is used)
•120 VAC Power Adapter (if powered from standard commercial power)
The ODU/IDU Cable is available in standard lengths as a SafeTLink optional
accessory. Custom lengths are also available through LPN Wireless authorized
cable manufacturers.
Antenna cables are available in standard lengths as a SafeTLink optional
accessory. Custom length cables are available from a number of suppliers.
28 Pin
Connector
Antenna cable
N male both ends
ODU
ODU/IDU Cable
28 Pin Connector on ODU end
DB-25 Male on IDU end
N female Antenna
I
D
U
DB-25 Female
Screw Terminals
DC Power
Ma
j
or Alarm
Minor Alarm
Alarm In
p
ut 1
Alarm In
p
ut 2
(1 or 4) T1
(2 or 4) RJ-48
Management (RJ-45)
E
t
h
e
rn
et

User Manual
SafeTLink Point-to-Point Microwave Radio System
LPN Wireless, Inc. •561 Sky Ranch •Petaluma, California 94954 U.S.A. •www.lpnwireless.com
Tel: [phone] •Fax: [phone] •E-mail: sale[email protected]m
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Caution
Ready-made cables, with connectors installed on both ends, may be
difficult to pull through conduits and cable entry-ways.
4.1.3 SafeTLink with ODU only
One or both ends of a SafeTLink system may be configured without an IDU. The
radio link will operate normally except that an end without an IDU will not have
status indicator lights, external alarm inputs or alarm relay contacts. Some
applications where an IDU might not be needed are back-to-back repeaters,
remote ends of a system that have no alarm interfaces, or systems where alarms
are generated from the management system rather than from relay contacts.
An end of a SafeTLink system without an IDU is shown in Figure 4-2.
Figure 4-2
ODU without an IDU
Figure 4-2 shows the ODU with an external antenna. ODUs equipped with an
integrated antenna do not require a separate antenna or antenna cable.
For this configuration, the following items are required:
•ODU
•ODU/IDU Cable
•Antenna Cable (if external antenna is used)
•120 VAC Power Adapter (if powered from standard commercial power)
The ODU Cable connects directly to other customer provided equipment. The
cable comes equipped with a DB-25 male connector. The connector can be cut
off and replaced with another type of connector if required. The ODU/IDU Cable
is available in standard lengths as a SafeTLink optional accessory. Custom
lengths are also available through LPN Wireless authorized cable manufacturers.
Connector pin information is located in Appendix I.
28 Pin
Connecto
r
Antenna cable
N male both ends
ODU
ODU/IDU Cable
28 Pin Connector on ODU end
DB-25 male on o
pp
osite end
N female Antenna