WIRELESS ETHERNET BRIDGES – Item No.
Special Provision No. 683S22
1.
September 2007
SCOPE
This Special Provision covers the requirements for the installation and testing of wireless Ethernet bridges.
The wireless Ethernet bridge shall provide a point-to-point network connection where a fibre optic link does
not exist. This item shall include an antenna, radio, network interface, cabling, power supply, and all
necessary mounting equipment.
2.
REFERENCES
This Special Provision refers to the following standards, specifications or publications:
Electronic Industries Alliance / Telecommunications Industry Association:
EIA-195C
Electrical and Mechanical Characteristics for Microwave Antennas
TIA-222-D
Structural Standard for Antenna Supporting Structures and Antennas
Institute of Electrical and Electronics Engineers:
IEEE 802.3-2005
IEEE Standard for Information technology - Telecommunications and information
exchange between systems - Local and metropolitan area networks - Specific
requirements Part 3: Carrier Sense Multiple Access with Collision Detection
(CSMA/CD) Access Method and Physical Layer Specifications
Others:
IC RSS 210
Industry Canada Radio Standards Specification Low-power Licence Exempt
Radiocommunication Devices
Ontario Electrical Safety Code
3.
DEFINITIONS
For the purpose of this Special Provision, the following definitions apply:
Category 5 cable: means a twisted pair cable type designed for high signal integrity. This type of cable is
used for computer networks such as Ethernet, and is also used to carry many other signals such as basic voice
services, token ring, etc.
ISM: means Industrial, Scientific, and Medical radio bands.
Latency: means the delay between the initiation of a network transmission by a sender and the initial receipt
of that transmission by a receiver. It is typically commensurate with the distance the signal must travel, but is
also affected by delays introduced in network routing, including queues, multiple routes, packet loss, etc.
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SNMP: means Simple Network Management Protocol.
WPA: means Wi-Fi Protected Access.
VSWR: means Voltage Standing Wave Radio
4.
DESIGN AND SUBMISSION REQUIREMENTS
4.1
Submission Requirements
The Contractor shall supply the specification sheets for the wireless Ethernet bridges to the Contract
Administrator for review prior to ordering. The submission shall include all information and documentation
needed in order to verify Industry Canada approvals.
5.
MATERIALS
5.1
General
5.1.1
The wireless Ethernet bridge shall operate in the any Industry Canada license exempt band.
5.1.2
The units shall have a minimum of 4 separate non-overlapping frequency channels. These channels
shall be user selectable.
5.1.3
The units shall meet safety compliance with CSA (C-UL), and CEC.
5.1.4
The units shall be compliant with most recent version of Industry Canada RSS-210.
5.1.5
The wireless Ethernet bridge shall not cause interference that disrupt the operation of other wireless
equipment nor accept interference that may cause undesired operation of the device.
5.1.6
The wireless Ethernet bridge shall include all mounting hardware necessary for mounting on poles.
5.1.7
All Ethernet interfaces shall comply with IEEE 802.3 specifications.
5.1.8
The wireless Ethernet bridge shall include a minimum of one (1) auto negotiable 10/100BaseTX
electrical port.
5.1.9
All Ethernet connectors shall be RJ-45 connectors.
5.1.10 The wireless Ethernet bridge shall include device management software to allow for remote
configuration and fault diagnostics using SNMP. All required licenses shall be included in the
Contract price for the item.
5.1.11 The materials supplied shall include any filters, couplers, or attenuators required to meet the
performance requirements.
5.1.12 All wireless Ethernet bridge components shall be adequately protected against corrosion and other
damaging influences of the roadside conditions.
5.1.13 The receiver sensitivity shall be -85 dBm or better.
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5.2
Electrical
5.2.1
The wireless Ethernet bridge shall retain operational parameters during a power interruption and shall
automatically resume normal operation after the power is restored.
5.2.2
The units shall accept power from a 115 VAC ± 15%, 60 Hz ± 5% receptacle.
5.2.3
The Contractor shall provide power supplies required for full operation of the wireless Ethernet
bridge.
5.2.4
All power supplies shall be CSA approved and installed in accordance with Ontario Electrical Safety
Code regulations.
5.3
Performance
5.3.1
The wireless Ethernet bridge shall have a minimum unidirectional throughput of 20 Mbps.
5.3.2
The units shall be capable of operating over a minimum range of 5 km line of sight.
5.3.3
The wireless Ethernet bridge system latency shall not exceed 5 ms.
5.3.4
The units shall have a packet error rate of 10-6 or better at -85 dBm.
5.4
Security
5.4.1
Address filtering shall be done in the MAC layer and not in any layer from the Network Layer and
above.
5.4.2
The security protocol for the wireless Ethernet bridges shall be WPA or proprietary.
5.5
Antenna
5.5.1
The Contractor shall provide all necessary mounting hardware to mount the antenna (or integrated
Tx/Rx unit) to the poles indicated in the Contract Drawings.
5.5.2
The signal strength emitted from the antenna shall not exceed the most recent issue of IC RSS-210,
antenna emission standards.
5.5.3
The antenna shall operate with the transmitter and receiver operating frequencies in the ISM band.
5.5.4
The antennae shall conform to EIA-195C (Electrical and Mechanical Characteristics for Microwave
Antennae).
5.5.5
The maximum azimuth and elevation beamwidth of the antenna shall be no greater than 20o.
5.5.6
The antenna’s azimuth and elevation beamwidth and gain shall be procured so that the wireless
Ethernet bridge achieves its performance specifications.
5.5.7
If an external antenna is needed for the application, it shall be provided by the supplier of the wireless
device. Any antenna modifications shall comply with Industry Canada regulations for this product.
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5.5.8
A protective radome shall be supplied with each antenna to prevent any surface icing and shield the
antenna from ice, snow, dirt, and salt.
5.5.9
The antenna connector shall be N-Type female.
5.5.10 The antenna input impedance shall be 50 ohms.
5.6
Physical
5.6.1
All wireless Ethernet bridge components shall have an operating temperature range of at least – 40o C
to + 60o C with a relative humidity of 95% non-condensing.
5.6.2
The wireless Ethernet bridge shall be capable of storage without damage in an unpowered state over a
temperature range of – 50o C to + 85o C.
5.6.3
The wireless Ethernet bridge antenna (or integrated Tx/Rx unit) mounted on the CCTV camera poles
shall not exceed a physical weight of 5 kg.
5.6.4
The wireless Ethernet bridge shall be able to withstand a wind load of at least 160 km/h.
5.6.5
The units shall be either hermetically sealed or shall be equipped with a removable drain plug to
avoid the collection of moisture inside the unit.
5.7
Cabling
5.7.1
The Contractor shall supply all necessary cabling required to make the wireless Ethernet bridge
operational.
5.7.2
Cables shall run continuous from the controller cabinet to the antenna (or integrated Tx/Rx unit). No
intermediate splices shall be allowed.
5.7.3
Ethernet cables shall be outdoor rated Category 5 (CAT5) or better.
5.7.4
The distance of any Ethernet cable shall not exceed 50m.
5.7.5
The coaxial cable, if required, shall be 12.7mm foam dielectric type or equivalent. The outer
conductor of the coaxial cable shall be solid corrugated or braided copper and shall provide
continuous shielding against radio frequency and electromagnetic interference. The dielectric of the
coaxial cable shall be polyethylene foam with no pressurization required. The impedance of the
coaxial cable shall be 50 ohms.
5.7.6
The outer jacket of any type of cable to be connected to the antenna shall be weatherproof and
ultraviolet stabilized for outdoor applications.
5.8
Surge Protector
5.8.1
The surge protector shall be of dc blocked, multi-strike type or an approved equivalent.
5.8.2
The surge protector shall be housed in the control cabinet and connected to the electrical system
ground, or alternatively to a dedicated ground electrode provided for protection of the pole mounted
systems.
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5.8.3
For coaxial cabling, the surge protector shall have the following characteristics:
a)
b)
c)
d)
5.8.4
Impedance:
Maximum power:
VSWR:
Insertion loss:
50 ohms
50W
< 1.1 over ISM band
< 0.1 dB over ISM band
For all cabling to the antenna (or integrated Tx/Rx unit) the surge protector shall have the following
characteristics:
a)
b)
c)
d)
Maximum Surge:
Strike throughput energy:
Turn-on voltage:
Turn-on time:
50 kA IEC 801-5 8/20 waveform 500J
< 220 μJ
600V DC ±20%
2.5 ns for 2 kV/ns
6.
EQUIPMENT – Not Used
7.
CONSTRUCTION
7.1
Installation and Configuration
7.1.1
The wireless Ethernet bridge shall be installed according to the manufacturer’s recommendations.
7.1.2
The wireless Ethernet bridge power cables shall be connected to the uninterruptible power supply in
the cabinet.
7.1.3
The wireless Ethernet bridge shall be aligned to optimize the transmitted signal.
7.1.4
The equipment shall be properly grounded for lightning protection in accordance with EIA-195C.
7.1.5
The Contractor shall install the surge protectors in accordance to the manufacturer’s
recommendations.
7.1.6
The surge protectors shall be installed at each location and shall be suitably grounded.
7.1.7
The coaxial cable between the antenna and transmitter and shall be routed within conduit.
7.1.8
The Contractor shall terminate all cables with the appropriate connectors to terminal equipment to
provide a fully functional system. The Contractor shall seal all connectors against moisture after
tightening.
7.1.9
The Contractor shall ground all cable runs to the manufacturer’s recommendations.
7.1.10 The Contractor shall neatly train and organize all cables. No cables shall be installed with a radius
less than the manufacturer’s minimum recommended bending radius. All cables shall be labelled.
7.1.11 The wireless Ethernet bridge supporting structure shall be securely fastened to the vertical component
of any static structure. No welding or drilling of the structure is permitted. The antenna shall be
mounted in such a manner as not to interfere with any other component or any normal maintenance
activity.
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7.1.12 The devices shall be mounted in a manner that allows easy access to all connections.
7.1.13 The mounting and grounding arrangement shall meet or exceed the recommendations as stipulated in
TIA-222-D.
7.1.14 The Contractor shall mount the units to minimize the hazard of rainwater entering the assembly.
7.1.15 In the event that out-of-band noise interferes with the operation of the wireless Ethernet bridge, the
Contractor shall install a supplemental bandpass filter.
7.1.16 The Contractor shall install all interface cable connections between the wireless Ethernet bridge and
Ethernet switches according to the drawing package.
7.1.17 The Contractor shall configure an IP address for the wireless Ethernet bridges based on the
information provided by the Contract Administrator.
7.1.18 The Contractor shall configure all user names and passwords for the wireless Ethernet bridge based
on the information provided by the Contract Administrator.
7.1.19 All cables shall be trained together along the support rails in the equipment racks.
7.2
Quality Control
The Contractor is responsible for all testing and documentation required to establish approval and acceptance
of installation and operation of this equipment. The framework of the approval process shall be as specified
elsewhere in the Contract Documents.
The following table details the clauses within this Special Provision, which are to be validated through the
PIT, POP, and SIT processes as indicated:
CLAUSE
PIT
POP
5.1.2


SIT
1
5.1.5
5.1.8


5.1.10



5.3.1
2
2
2
3
5.3.2
5.3.3


5.3.4


Testing Footnotes:
1
The Contractor shall handle and record all public complaints. The Contractor shall cease operation of
the wireless Ethernet bridge until appropriate action is taken to reduce the interference.
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2
The Contractor shall use the same communication frequency channel for testing as it is to be
configured in the field. The units shall be capable of transmitting 50% of its specified network load.
3
The Contractor shall verify that the wireless Ethernet bridge operates over the distance as installed.
9.
MEASUREMENT FOR PAYMENT
Measurement of the number of wireless Ethernet bridges by Plan Quantity as may be revised by Adjusted
Plan Quantity.
The unit of measure is each.
10.
BASIS OF PAYMENT
Payment at the Contract price for the above tender item shall be full compensation for all labour, Equipment
and Material required to do the work including delivery, installation, testing and the production of
documentation and test results, except SIT which is paid for under a separate item.
WARRANT:
September 2007
Always with this item.
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