This special provision is for the installation and testing of the following equipment:

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1 FIBRE OPTIC MODEMS - Item No. Special Provision No. 683F18 April DESCRIPTION This special provision is for the installation and testing of the following equipment: Low Range Fibre Optic Modems (LFOM) High Range Fibre Optic Modems (HFOM) Fibre Optic Taps (FOT) Fibre Optic Splitters (FOS) This equipment shall be considered "New" as defined under the special provision "Quality Control, Testing and Documentation for Advanced Traffic Management System Work" and shall be subject to all the terms and conditions specified in that special provisions. Following installation, the integrated operation of these components shall be confirmed through the undertaking of a Fibre Optic System Test. 2. MATERIAL 2.1 Fibre Optic Modems A High Range Fibre Optic Modem or Low Range Fibre Optic Modem interconnected by optical fibre to a second High Range or Low Range Fibre Optic Modem shall provide full duplex communications between two EIA/TIA-232-E data ports. A single device may be used to perform the functions of both High Range and Low Range Fibre Optic Modems, if the device can meet the requirements of both modems by means of switch or jumper selection. Each FOM shall have a D-Type 25 pin connector providing an EIA/TIA-232-E compatible interface. Each FOM shall be configured as DCE. Each FOM shall be Rack Mountable. Each FOM shall be supplied with a cross connect device to permit communications between two DCE ports. The cross connect device may be internal to the FOM and selectable to provide DTE or DCE interface. A FOM which is to be electrically connected to a DCP or a PSD shall be cross connected to provide DCE to DCE interface. A FOM which is to be electrically connected to an existing field controller or Camera Control Receiver shall be configured to provide DTE to DCE interface. April 2005 Page 1 of 8 SSP 683F18

2 Two FOMs interconnected by optical fibre shall provide full duplex communications on circuits BA and BB. Circuit identification shall be in accordance with EIA/TIA-232-E. Pins 1, 2, 3, 4, 5, 7 and 8 shall be assigned in accordance with EIA/TIA-232-E. If circuit CA (Request to Send) of the FOM is OFF, the LED of the FOM shall be off. If circuit CA is ON, the FOM shall transmit an encoded optical signal which will turn ON circuit CF (Data Carrier Detect) on a FOM connected to it by optical fibres. In addition, the same signal shall provide data communications between the FOMs on circuits BA and BB. Handshaking operation of circuits CA and CF shall be independent of the state of the data on circuits BA and BB. The FOM shall raise Clear to Send ON after it detects Request to Send and after sufficient time for the FOM at the other end of the fibre to have detected the Request to Send signal and turned its Data Carrier Detect ON. The RTS to CTS delay shall be user setable between * and * ms. A FOM shall transmit information to multiple FOMs through multimode optical fibre by means of an LED with a centre wavelength between 820 nm and 870 nm at 25C. LEDs shall be coupled to optical fibre through an AT&T ST style compatible connector or panel mount receptacle mounted on the FOM. The LED launch power shall be defined as the power launched by the LED into one metre of graded index optical fibre with a nominal core dimension of 62.5 m, a nominal cladding dimension of 125 m and a numerical aperture of The ratio of LED launch power to LED off power shall be at least 45 db. The receiver shall be coupled to the optical fibre through an AT&T ST style compatible coupling or panel mount receptacle mounted on the FOM. The receiver sensitivity shall be defined as the minimum optical power required to be received by the receiver to operate with a bit error rate of The Contractor shall supply and install optical attenuators, as required, in the event that they are necessary for the proper operation of the system. Attenuators and their method of installation shall be approved by the Contract Administrator. Pulse width distortion shall be defined as the difference between the pulse width into one FOM EIA/TIA-232-E port and the output pulse width from the EIA/TIA-232-E port of an interconnected FOM. Pulse width shall be measured in units of time between the markto-space and space-to-mark transitions of any particular data bit measured in accordance with TIA/EIA-404-B Low Range Fibre Optic Modem The LED launch power for an LFOM shall be between 14 db and 17 db greater than the receiver sensitivity over the full operating temperature range. Two LFOMs interconnected by optical fibre with a total optical attenuation between 0 db and 14 db shall be capable of providing data communications between two EIA/TIA- April 2005 Page 2 of 8 SSP 683F18

3 232-E ports at speeds of up to 19.2 kbps with an added pulse width distortion not exceeding 1.5 s. Each LFOM shall be clearly labelled as a "LOW RANGE FIBRE OPTIC MODEM" High Range Fibre Optic Modem The LED launch power for an HFOM shall be between 18 db and 20 db greater than the receiver sensitivity over the full operating temperature range. Two HFOMs interconnected by optical fibre with a total optical attenuation between 4 db and 18 db shall be capable of providing data communications between two EIA/TIA- 232-E ports at speeds of up to 19.2 kbps with an added pulse width distortion not exceeding 1.5 s. Each HFOM shall be clearly labelled as a "HIGH RANGE FIBRE OPTIC MODEM" Power Supply The FOM power supply shall meet the following requirements. The power supply shall operate from an input voltage of 115 V ï20 V, 60 Hz ï3 Hz nominal. The power supply shall have DC outputs rated to meet the voltage and current requirements of the FOM. The modem shall derive all operating power from the power supply or from the transmitted data signal in conjunction with the power supply. No supply power is to be drawn from any other pins. The maximum current draw on the transmitted signal shall not exceed EIA/TIA-232-E specifications. The power supply shall have a minimum Mean Time Between Failure of 200,000 hours. 2.2 Fibre Optic Taps and Splitters Each multimode (MM) FOT and FOS shall be a three port, bidirectional passive device with one input optical fibre port and two output optical fibre ports. The optical fibre ports shall be labelled such that when light enters port 1, the light will exit ports 2 and 3, with port 2 being the trunk (lower loss) port and port 3 being the branch (higher loss) port. Each port shall also be labelled as to the percentage of split or tap. The MM optical fibre used shall have a graded refractive index profile. The MM fibre shall consist of a glass core surrounded by a glass cladding which shall be surrounded by a polymer coating or buffer material. The MM fibre core shall have a diameter of 62.5 m with a tolerance of ï3m. The MM fibre cladding shall have an outer diameter of 125 m with a tolerance of ï3 m. The MM fibre core shall have a theoretical numerical aperture of April 2005 Page 3 of 8 SSP 683F18

4 The core eccentricity shall not exceed 7.5%. The typical eccentricity shall not be greater than 2%. The core Non-Circularity shall be less than 2%. The input and output fibres shall be protected by a tight buffer or buffer tube, a strength member composed of a layer of KEVLAR, and an overall cable jacket. The construction shall be suitable for direct termination with fibre optic connectors. The housing for the FOTs and FOSs shall be sufficiently rugged and suitable for mounting to a shelf. All inputs and outputs shall be connectorized with AT&T ST style compatible connectors. These connectors shall be compatible with, and have the same specifications as, the Fibre Optic Patch Cord and Drop Cable connectors. All connectors shall be polished to a PC finish such that the return loss per mated pair of connectors is at least 25 db. The FOTs and FOSs shall be tested using the insertion loss test procedure specified in the Fibre Optic System Test specification. The Contractor shall install ST compatible coupling bushings where necessary to connect FOTs and FOSs to drop cables and patch cords. Coupling bushings shall be securely fastened to the FOT and FOS mounting shelf Fibre Optic Tap The maximum insertion loss measured using the insertion loss test procedure specified in the Fibre Optic System Test, from port 1 to port 2 or from port 2 to port 1, with connectors installed, shall be -2.8 db. The maximum insertion loss from port 1 to port 2 or from port 2 to port 1, before connectorization, shall be -1.8 db. The maximum insertion loss measured using the insertion loss test procedure specified in the Fibre Optic System Test, from port 1 to port 3 or from port 3 to port 1, with connectors installed, shall be -8.8 db. The maximum insertion loss from port 1 to port 3 or from port 3 to port 1, before connectorization, shall be -7.8 db. The minimum loss from port 3 to port 2 or from port 2 to port 3 shall be -40 db including the measured connector loss. The FOT shall meet these loss specifications over the full operating temperature range. The FOT shall continue to meet the loss specifications over the operating temperature range after it has been subjected to the full storage temperature range. April 2005 Page 4 of 8 SSP 683F18

5 3. METHOD Fibre Optic Splitter The maximum insertion loss measured using the insertion loss test procedure specified in the Fibre Optic System Test, from port 1 to port 2 or from port 2 to port 1, with connectors installed, shall be -4.0 db. The maximum insertion loss from port 1 to port 2 or from port 2 to port 1, before connectorization, shall be -3.0 db. The maximum insertion loss measured using the insertion loss test procedure specified in the Fibre Optic System Test, from port 1 to port 3 or from port 3 to port 1, with connectors installed, shall be -5.8 db. The maximum insertion loss from port 1 to port 3 or from port 3 to port 1, before connectorization, shall be -4.8 db. The minimum loss from port 3 to port 2 or from port 2 to port 3 shall be -40 db including the measured connector loss. The FOS shall meet these loss specifications over the full operating temperature range. The FOS shall continue to meet the loss specifications over the operating temperature range after it has been subjected to the full storage temperature range. 3.1 Fibre Optic Modems, Taps and Splitters FOMs shall be installed in the cabinets identified in the drawings and shall share the available equipment space with existing equipment. The FOSs and FOTs shall be installed in and fastened to the inside cavity of the "Rack Mounted Interconnect Centre/Panel" specified elsewhere in this contract. The drawings show the equipment space allocated to FOMs and PSDs for typical cabinet arrangements. The Contractor shall coordinate the physical space required by the FOMs or PSDs to ensure that they will be accommodated in the allocated space. The Contractor shall connect the correct Fibre Optic Patch Cord Cable connectors to each FOM in accordance with the drawings. When connecting optical communication equipment, the Fibre Optic Patch Cord Cables shall be neatly trained along the rails of the equipment rack. No Fibre Optic Patch Cord Cables shall be installed with a bending radius less than the manufacturers minimum recommended bending radius Fibre Optic System Test This test shall be conducted following the installation of all fibre drop cables, patch cords, splices, fibre optic taps, fibre optic splitters, and connectors, except for trunk link loss measurements which may be conducted any time after the link to be measured has been spliced. April 2005 Page 5 of 8 SSP 683F18

6 All test results for the VDS, CMS, and CCR subsystems shall be recorded on the Testing Documentation Schematics (TDSs), provided in a separate package, for each link. The TDSs indicate the maximum allowable loss by design for each measurement. All test results for the LCS and RMS subsystems, which will only consist of trunk link losses, shall be recorded on the TDS titled "LCS and RMS Trunk Link Losses". The contractor shall make a separate set of measurements for each of the transmit and receive fibres of each data bus link. Both sets will be recorded on the same TDS for each link. Once all testing is complete the TDSs must be submitted to the Contract Administrator for approval. All fibre optic links and devices shall be tested using the following procedure: i) A light source with a centre wavelength of 820 to 890 nm shall be used in conjunction with a suitable receiver for multimode tests, and a source of 1310 nm shall be used in conjunction with a suitable receiver for single mode tests. The contractor shall assemble one jumper cable at least 10 metres long with a connector to mate with the light source on one end and an output ST connector on the other end (the "Source Jumper"). This jumper shall be connected to the light source and this connection shall not be disturbed during the measurement process. The receiver shall have a detector with a photosensitive area at least 1 mm in diameter and an ST connector adapter. The Contractor shall assemble another jumper cable at least 10 metres long with ST connectors on both ends (the "Measurement Jumper"). The fibre and connectors used in these jumpers shall have the same specifications as the fibres and connectors used in the system. ii) iii) iv) The output ST connector from the Source Jumper shall be connected directly to the receiver and the resulting reading shall be recorded as P0. The output ST connector from the Source Jumper cable shall be connected to the input of the link or device under test using an ST coupling bushing. The output of the link or device under test shall be connected using an ST coupling bushing to one end of the Measurement Jumper. The other end of the Measurement Jumper shall be connected to the receiver. This loss reading shall be recorded as P1. The measured loss for the link or device and its associated connectors shall be calculated by subtracting P1 from P Trunk Link Loss Measurements Trunk link loss measurements shall be performed on each link (transmit and receive) from the first connector before the trunk splice to the first connector after the next trunk splice on each trunk fibre link. The measured value shall be recorded in the appropriate boxes on the appropriate TDS for each location. Re-calibration of the test equipment to determine P0 shall be done at each FDIN location and after a maximum of two hours elapsed time since the previous calibration. April 2005 Page 6 of 8 SSP 683F18

7 3.2.2 Bus Link Loss Measurements Bus link loss measurements shall be performed by placing the appropriate test light source at the connector for the modem at the beginning of each link (transmit and receive) at FDIN locations as shown on each TDS. Link measurements shall then be taken at each subsequent connector along the particular bus link the source is attached to. The measured values shall be recorded in the appropriate boxes on the boxes of the TDS for each location. Re-calibration of the test equipment to determine P0 shall be done at each FDIN location and after a maximum of two hours elapsed time since the previous calibration. 4. QUALITY CONTROL The Contractor is responsible for all testing and documentation required to establish approval and acceptance of the production, installation and operation of these materials and equipment. The terms and conditions of the General Requirements establish the framework of the approval process. The following identifies the specific Quality Control requirements for this Special Provision. 4.1 Pre-Installation Testing Each FOM shall be functionally tested by interconnecting an FOM to the FOM under test. The LFOMs shall be interconnected through 62.5 m core, 125 m cladding multimode fibre with path losses of 0 db and of 14 db. The HFOMs shall be interconnected through 62.5 m core, 125 m cladding multimode fibre with path losses of 4 db and of 18 db. The Contractor shall verify that data and control signals are transmitted and received in accordance with the contract. The Contractor shall test the modems by performing a BER test on each pair of modems. The BER test shall not exceed The control signals shall be verified by connecting the modems as described above and measuring the RTS-CTS delay of each modem and the RTS-CD delay of each channel. The RTS-CTS delay shall not exceed 3.6 msec and shall be greater than the RTS-CD delay (channel set-up time). Two random modems of both types shall be subjected to an environmental chamber test for BER which shall not exceed 10-9 at 9600 bps over the required path loss ranges. These environmental chamber tests shall be done at the Belfield yard and shall be coordinated with the Contract Administrator. Fibre Optic Taps and Splitters shall be tested for insertion loss prior to installation and after two temperature cycles over the full storage temperature range. This testing may be performed by the manufacturer or the contractor before or after installation of connectors. Insertion loss measured shall meet or exceed the performance requirements of the contract. Results of the tests shall be provided to the Contract Administrator. Four random modems (low range) shall be tested in the System Development Network located in the Communications Room at the TOC, for one week. The Contractor shall provide the Power Supply Unit required for the testing and shall give the Contract Administrator a 3 week advance notice prior to the date of testing. April 2005 Page 7 of 8 SSP 683F18

8 4.2 Proof of Performance Testing Full performance tests shall be performed at 9600 bps and shall include the measurement of pulse width distortion and bit error rate. The BER shall not exceed 10-9 for four modems (two high range and two low range) and 10-7 for all remaining modems. The test shall be conducted using a random bit generator. 4.3 System Integration Testing The Contractor shall carry out system integration testing to ensure that the modems perform to the specified standards when used in operation with the following: drop/insert nodes, controllers, communication cables and other devices installed in the contract. existing components such as fibre optic cables and controllers. Testing in conjunction with the communications subsystem shall be performed with both the primary and redundant networks. 5. MEASUREMENT FOR PAYMENT Measurement of the number of Fibre Optic Modems shall be by Plan Quantity, as may be revised by Adjusted Plan Quantity. The unit of measurement is each. 6. BASIS OF PAYMENT Payment at the contract price shall be full compensation for all labour, equipment and materials required to do the work including delivery, installation, testing (except for SIT which is paid for under a separate item), and the production of all drawings, text, and test results. April 2005 Page 8 of 8 SSP 683F18

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