FDM2SA Fiber Optic Modem

Transcription

1 2SA Fiber Optic Modem Series All Fiber Topologies - Compliant USER GUIDE (TI) 6 Sept 06 Dwg: A B GDI COMMUNICATIONS LLC PO Box I-80 Exit 1 Verdi, NV Phone: (775) Fax: (775) support@sgdi.com

2 1 RI 2 CD 3 DTR 4 SG RXD 5 TXD 6 CTS 7 RTS 8 ENABLE DISABLE Series of Fiber Optic Modems Stand Alone Models Plug-in Models for s and Racks 2SA FSK -FSK Data Ports TXD KOD RTS RXD Anti-Strm Reset A B 2/4 Wire FSK CD KOD RTS CTS TXD RXD 2SA Data Ports TXD KOD RTS RXD Anti-Strm Reset -FiberHub -FiberHub Link Activity AB CD TXD TXD RXD RXD Data Port Anti- Streaming Alarm Reset C A B 170 MODEL 170 GDI Communications LLC Verdi NV MODEM IN OUT PWR FAIL FIBER STATUS BATTERY D PWR MAIN DATA TXD AUX DATA TXD TXD RXD RXD SERIAL PORT RXD RING STATUS ANTI- STREAM ALARM RESET Fail RING 1 RJ45 DC Power Center Main Battery D 1 8 AUX PORT AUX CONN DC Power Center Main Battery Alarm Charging GDI Communications Alarm Charging GDI Communications DC Power Center Main Battery Alarm Charging GDI Communications RING 2 GDI NEVADA Multiple Fiber Topologies in One Modem Single Ring, Dual Redundant Rings, Daisy Chain and Point to Point. Combination Fiber Optic and FSK Modems Built in FSK Modems for 2/4 wire Copper and Fiber Applications. Intuitive Fiber Status Display Pictorially indicates the switching status of the modem. Fiber Identification Display shows a 1 or 2 to indicate which port the fiber belongs. Generates DTE Handshaking Necessary for Remote Fiber to 2/4Wire FSK to TMC applications. Auxiliary Data Port For 2/4Wire FSK or SS Radio Branch Circuits. Built-in Uninterruptible Power Supply Provides Optical Continuity at a Failed Intersection. Series Insert

3 2SA Table of Contents Page 1/3 Series Overview 4 The Series FiberHub 6 -FSK 6 Introduction to the 2SA 7 2SA 7 Front Panels Displays 7 Data Port Activity Displays 8 TXD LED 8 RXD LED 8 Data Port Anti- Streaming 8 Reset Switch 8 Intuitive Fiber Status Displays 8 Fiber Identification 8 Fiber Status Displays for Redundant Rings and Daisy Chains 9 Fiber Status Displays for Single Rings 9 DC Power Center Display 10 DC Power Center LED Indicators 10 Main 10 Charging 10 Battery 11 Alarm 11 Rear Panel 11 Power Connections 11 Dual Data Ports 11 Optical Ports 12 Bottom View 12 6 Sep SA Preliminary User Guide 1 Dwg: A B

4 2SA Table of Contents Page 2/3 Installation 13 Mounting Options 13 Dynamic Range 13 Switch-able Options 14 Topology Selections 14 2 Rings (Self Healing Dual Counter Rotating Rings) Ring 14 Daisy Chain 14 Data Protocol RS232/ Baud Rates 15 Parity 15 RTS/CTS Handshaking 15 CTS Delay 15 Anti-Streaming 15 Auxiliary Port DTE/DCE Options 16 Data Port Flow Diagrams 16 Normal Operation (DCE Mode) 16 DCE Mode with KOD Handshaking 17 DTE Operation at a Location 17 Fiber Identification Techniques 18 Factory Default Settings 19 Data Port Pin-out Assignments 19 KOD Jumper 20 Applications 21 Self Healing Dual Counter Rotating Ring Operation 21 Foldback Condition 22 Auxiliary Schemes for Dual Rings 23 Disaster Recovery Remote Located Aux 23 Remote Located Aux for Disaster Recovery on Linear Cable Installations 24 6 Sep SA Preliminary User Guide 2 Dwg: A B

5 2SA Table of Contents Page 3/3 Single Ring Operation 25 Single Ring Display 26 Point to Point Operation 27 Point to Point with No Redundant Fiber Path 27 Point to Point with Redundant Fiber Path 28 Status Displays 29 Daisy Chain Operation 30 Single String Daisy Chain 30 Status Display 31 Fiber Alarm Notification 31 Dual Daisy Chain (Central ) 32 KOD Applications 33 Fiber to 2 Wire Application 33 Fiber to 4 Wire Application 33 Fiber to Copper to Fiber (Copper Bridge) 34 Copper to Fiber to Copper (Fiber Bridge) 34 Care and Handling Procedures for Optical Connectors 35 Release History and Disclaimer 38 6 Sep SA Preliminary User Guide 3 Dwg: A B

6 SERIES OVERVIEW The Series of Hardened Modems are designed for polling applications utilizing RS232/422 Asynchronous transmission over Multimode and Singlemode Fiber Optics. All modems in the series are communications compatible with each other, thus allowing greater flexibility of use. The Series comprise of six Digital Modems: 1. The 2SA is a Stand Alone version. 2. The 170 is a Plug-in version for the The 2070 is a Plug-in version for the The FiberHub performs as a 1 x 3 star optical hub that ties in optical branch circuits into the mainstream communications path. 5. The -FSK is a combination of a 2SA and a FSK modem. 6. The -SSR is a combination of a 2SA and a Spread Spectrum Radio. The modems can operate in many different topologies, even on a simple fiber ring when there is only one fiber available, later as more fibers become available, simply flip a switch to change to the new topology. This unique capability of operating in multiple topologies offers the advantage of One Modem for all Topologies. Switch Selectable and Operating Topologies are as follows: Single Fiber Ring Dual Fiber Redundant Ring (Self Healing) Point to Point Daisy Chain Format. The modems have a high dynamic range yet they are immune to optical over loads, therefore no optical attenuators are required for short runs or even bench top back to back testing! The Fiber optic transceivers are 00fully Fully Protected Optics Any modem can be designated as a or, also for Auto Restoration any modem can be designated as an Auxiliary. 6 Sep SA Preliminary User Guide 4 Dwg: A B

7 A unique and intuitive Dual Seven Segment display graphically indicates the status of the fiber system, making diagnostics visually simple. All series modems have the unique capability of Fiber Identification; the display will flash a 1 or 2 indicating which circuit the fiber belongs to. Other advantages include multiple use Dual Data Ports enabling branch circuit capabilities such as an On Street to Local (same location), or 4wire or Spread Spectrum Radio communications. All modems have the unique capability of having their Auxiliary Port switched from DCE to DTE mode and then generate RTS prior to data flow, this is essential for 2wire FSK communications. The Series represents a new generation of digital fiber optic modems utilizing a Replaceable Operating System (ROS). As requirements change, or new features become available, a new program can be loaded so as to provide a migration path to upgrade the existing system. 170 This is a Plug-In version for the 170 Series of s and the R400/R800 Rack Series. The Main Data port is connected via the card edge connector to the 170 backplane while the Aux Data Port RJ45 is front accessible for combining external data links in the polling stream. For rack-mounted communications at the Traffic Maintenance Center, R400/R800 Series Racks can be populated with the 170 to complete the communications system This is a Plug-In version for the 2070 Series of s. The Main and Auxiliary Data ports provide the same functionality as in the 170, plus one of the 2070 s spare Serial Ports SP2 or SP4 (slot dependant) is also brought out to the front panel. For rack-mounted communications at the Traffic Maintenance Center, R400/R800 Series Racks would be populated with the 170 to complete the communications system. 6 Sep SA Preliminary User Guide 5 Dwg: A B

8 FiberHub The FiberHub is designed to act like a hub or star that ties four optical branch circuits together in a 1 x 3 A typically deployment would be anywhere in a fiber arterial daisy-chain or ring at an intersection where it ties in the North/South cross street optical branch circuits into the West/East main arterial fiber run. As with all modems, data ports are provided for the local controller and auxiliary communications. W N S E -FSK The -FSK is a combination of the 2SA Fiber Optic Modem and GDI s Model 4xx Series FSK Modem, basically it is two interconnected modems housed in the same enclosure. Two RS232 Data Ports are provided along with the 2/4 Wire FSK Port, all three ports communicate to and from the fiber to the originating master source. Fiber Trunk -FSK Modem Main Port 2SA Fiber Optic Modem Aux- Port FSK Modem 2/4Wire Port Fiber Trunk RS232 RS232 2/4 Wire 2SA This user guide describes the 2SA and its operation. 6 Sep SA Preliminary User Guide 6 Dwg: A B

9 INTRODUCTION to the 2SA 2SA The Front Panel displays information on the status of the 2SA. The Rear Panel is where all the connections are made to the modem and the switchable options are located on the Bottom Panel. Two Data Ports are provided, Main and Auxiliary, the main Data Port DB9 typically connects to the local controller while the Auxiliary RJ45 connector can be used to bring in copper or radio based communications into the main data stream. The 2SA has an optional internal Uninterrupted Power Supply UPS that maintains full modem operation without any loss of communications. The 2SA has three mounting options, left or right wall mounting via a pair of Keyhole slots on both sides, or as a Stand Alone shelf mounted unit while still maintaining a vertical front panel view for all three options. Front Panel Displays The 2SA front panel has three distinctive information displays: 2SA Data Ports TXD KOD RTS RXD Anti-Strm Reset The upper is for viewing Data Port Activity. The middle display is for Fiber Status and Fiber Identification. The lower display is dedicated to the DC Power Center. Main DC Power Center Battery Alarm Charging GDI Communications 6 Sep SA Preliminary User Guide 7 Dwg: A B

10 Data Ports Activity Display This section displays the activity of data through the modem. TXD LED This indicates data activity from the fiber to the data port. Data Ports TXD KOD RTS RXD Anti-Strm RXD LED This indicates data activity from the data port to the fiber. KOD RTS This indicates handshaking is being generated from the fiber data stream. Data Port Anti-Streaming Alarm LED This indicates port data exceeded selected time out. Reset Switch Switch for resetting Anti-Streaming Alarm. Reset Intuitive Fiber Status Displays The seven segment displays show information as to the integrity of the fiber system, each of the red segment lines represent the incoming or outgoing fiber data path through the modem, while indicates a loss of incoming optical signal. Fiber Identification Data Ports TXD KOD RTS RXD Anti-Strm Reset Identifying whether a fiber has Receiver 1 or Receiver 2 traffic is as simple as plugging in and out each fiber into any receiver, the modem will flash the message 1or 2 to denote which receiver that fiber belongs to. See Installation Section -- Fiber Identification Techniques, page 17 for more details. A B A B Display indicates patchcord belongs in. Display indicates patchcord belongs in. 6 Sep SA Preliminary User Guide 8 Dwg: A B

11 Fiber Status Displays for Redundant Rings and Daisy Chains Normal Display. (Displays not Flashing) Common Displays Loss Of Signal LED s Flashing Redundant Ring Displays Loss of Signal Causes Local and Fold Back to Flash (Ring Alarm Condition). S of causes / Foldback S of causes / Foldback Flashing Display indicates a Transport Layer fault on the Fiber System. All Modems Flash Daisy Chain Displays No Fiber No by default on first modem First Modem set to Daisy Chain No by default on last modem Last Modem set to Daisy Chain No Fiber Fiber Status Display for Single Rings Loss of signal on Displays will Flash 1 Displays will Flash Sep SA Preliminary User Guide 9 Dwg: A B

12 DC Power Center Display The DC Power Center provides information on the status of the optional internal Uninterrupted Power Supply (UPS), such as incoming Main power, battery Charging (full and trickle charge), Alarm (no external power) and Battery power only. If the modem is equipped with an optional internal UPS and power fails, the modem will be fully operational until the batteries are depleted. Resumption of power will start the battery charging process while at the same time the modem will be fully operational. If the installation site supports a 24VDC UPS this may be connected to the DC power connector on the modem in lieu of an internal UPS. The DC Power Center shows the power state of the FiberHub. DC Power Center Main Battery DC Power Center Main Battery Alarm Charging Alarm Charging Normal Condition Running on Main Power and charging the batteries Incoming Power Failure Running on Battery Power with an Alarm indication. DC Power Center LED Indicators Main Indicates the modem is running of external power and is paired with the Charging LED. DC Power Center Main Battery Alarm Charging Charging The LED has two indicating modes, 1. On Solid, this indicates the battery is being charged at the maximum rate. 2. Pulsing indicates the battery has reached a full charge state and is being maintained. Pulse duty cycle varies with the state of charge. DC Power Center Main Battery Alarm Charging 6 Sep SA Preliminary User Guide 10 Dwg: A B

13 Battery Indicates the modem is running on batteries only and is paired with the Alarm LED. Alarm Indicates external power has failed. DC Power Center Main Battery Alarm Charging Rear Panel The rear panel is where the Fiber Optic, Data and Power connections interface to the modem, note that the fiber connections logically match the front panel fiber displays. Power Connections 18-30VDC Main Battery Enable Disable Ports Aux The modem can be connected to an external 24VDC UPS via the DC Jack, also a battery disconnect switch is provided for shipping or storage purposes VDC Battery Enable Disable Dual Data Ports The modem has Dual RS232 Data Ports (Main and Auxiliary). This is a single channel with dual ports, the main Data Port DB9 connector goes to the local Main controller while the Auxiliary RJ45 connector can be used to bring in copper or radio based communications into the main data stream. The Aux Data Port can be switched to operate as RS485 interface. Ports Aux Sep SA Preliminary User Guide 11 Dwg: A B

14 Optical Ports The craft friendly layout of the optical ports matches the front panel fiber display which makes for ease of installation. The optical ports are dual hybrid adapters that are interchangeable should a different style of connector such as ST, FC and SC be required. These hybrid adapters are coupled to the main optical transceivers through replaceable mini patchcords that isolate and protect the main optics from damage due to external dirty or damaged patchcords. Bottom View This panel is where the modem is set up for Fiber Topology, Data Rates, Hand-Shaking, Anti- Streaming or whether a Auxiliary Port acts as a DCE or as a DTE. Pin out connection diagrams are also included on this panel to assist the technician when making interconnect cables. Switch settings are described in the Installation Section. Data Port Pinouts Main Auxiliary RS-232 Female RS-232 RJ45 TXD RXD GND DCD DCD 6 TXD 4 GND 7 CTS CTS RTS 5 RXD 8 RTS NO CONNECTION NO CONNECTION PINS PINS 1-3 Port Switch Assignment Aux. Off 2 Rings 1 Ring Daisy Chain Ring RS232 RS Off 2400 Off 9600 Off 19.2Kbts Off 38.4Kbts Off 57.6Kbts Off 115.2Kbts Off Parity Odd RTS-CTS CTS-0ms Ant-Strm CM 64 Aux.Port DCE None Even Off 8ms Off Off DTE 6 Sep SA Preliminary User Guide 12 Dwg: A B

15 INSTALLATION Important Note: For those people who are not familiar with fiber optic procedures, please turn to page 35 and read the section titled: Care and Handling Procedures for Optical Connectors Mounting Options The modem has several versatile mounting options, it can be shelf mounted as a Stand Alone, or hang on a cabinet wall utilizing a pair of Keyhole slots. Both sides have pairs of keyhole slots for left or right wall mounting so as to maintain the desired front or rear panel view, hole centers are at 7.5inches. Dynamic Range For any system to work reliably there must be adequate signal level at the receiver. The modem must have a larger Dynamic Range, expressed in db, than the cables end to end attenuation (db). All Singlemode series have 25DB of dynamic range. Mode Operating Wavelength Dynamic Range Model # Singlemode 1300nm SM Laser 25db Series Steps necessary to determine reliable operation, 1. Determine if your fiber is Multi-Mode or Single Mode. 2. Using an Optical Power Meter measure the End to End Attenuation of your fiber pair, including all patchcords at the operating wavelength. 3. Add a minimum of 3db safety margin to this figure. 4. The Dynamic Range must be larger than the overall attenuation obtained in step 3 for reliable operation. 6 Sep SA Preliminary User Guide 13 Dwg: A B

16 Switchable Options /. The modem at the Head End or TMC that connects into the fiber system defines that it will be set as a, all other modems shall beset as slaves. Auxiliary Selection This switch selection is used for Alternate TMC Disaster Recovery scenarios. Typically a city works yard would have an Emergency TMC, Aux. it is here that the local modem would be set as an Auxiliary. Should a failure occur at the Primary location, the Auxiliary will automatically take over the operation of the fiber system, then automatically hand back control when the Primary TMC is back on line. Topology Selections Please note that you can have any combination of the following topologies, just mix or match. Off 1. 2 Rings (Self Healing Dual Counter Rotating Rings) This selection provides the best fault tolerant protection Ring This selection is used when there is only one spare fiber left to form a Single Ring 2 Rings 1 Ring 3. Daisy Chain This selection is for the classic Daisy Chain, leave the previous switch set to 2 Rings. 2 Rings Daisy Chain 1 Ring Ring Data Protocol RS232/485 Select RS232 when connecting to traffic controller or other devices utilizing a RS232 port. RS485 is used to drive longer distances than RS232 over 2 pairs of balanced transmission lines. RS232 RS485 6 Sep SA Preliminary User Guide 14 Dwg: A B

17 Baud Rates The selectable Baud Rates are, 1200, 2400, 9600, 19.2Kbt/s, 38.4Kbt/s, 57.6Kbt/s and 115.2Kbt/s. Parity Parity can be set for None, Odd or Even. Switch settings shown are Parity enabled and Even selected. For no Parity select None Kbts 38.4Kbts 57.6Kbts 115.2Kbts Parity Odd Off Off Off Off Off Off Off None Even RTS/CTS Handshaking When Handshaking is turned Off, data arriving at either data port from the attached devices will be transmitted over the fiber. When Handshaking is turned On and RTS is high or raised, data arriving at either data port from the attached devices will be transmitted over the fiber. When RTS is low no data will flow RTS-CTS Off CTS Delay The RTS to CTS delay can be set at 0ms or 8ms, 0ms is for fast operation and 8 ms is used for external transmission systems that require a delay. CTS-0ms 8ms Anti- Streaming Anti-Streaming times 2, 4, 8, 16, 32, and 64 seconds, all are switch selectable and are additive to a maximum of 126 seconds. Ant-Strm C-Mast 64 Off Off 6 Sep SA Preliminary User Guide 15 Dwg: A B

18 When RTS is raised the anti-streaming countdown timer starts, at its conclusion the data to fiber path is inhibited and latched in an open state, CTS is then lowered and the anti-streaming Alarm LED is lit. Should RTS be lowered the system will automatically reset but the anti-streaming alarm will remain lit indicating data timing violations from the attached controller. If the front panel anti- streaming RESET switch is momentary pushed, the system will automatically reset and the alarm LED will extinguish. Data Ports TXD KOD RTS RXD Anti-Strm Reset Auxiliary Port DCE/DTE Options This selection is normally left in the DCE mode, but if required the Auxiliary port can be driven from the Main port and appear as a DTE, see diagram below. Aux.Port DCE DTE Data Port Flow Diagrams 1. Normal Operation at a Location. (Aux Port switched to Normal Mode DCE) This allows the Main Port to be connected to Local, while the Aux Port can be connected to other modems such as a 4Wire FSK (DCE) or SS Radio (DCE) that requires no RTS to CTS handshaking initiated from the 2SA. If handshaking is required see 2. & 3. on the next page. The following drawing shows the signal flow information. Fiber Optics Data Ports Main Port (DB9F) TXD AB Fiber Lines Line Drivers Data Flow Common Function IFC-AXXXXX RXD RTS CTS Aux Port (RJ45) CTS IFC-AXXXXX RTS RXD TXD Local (DTE) S.S.Radio (DCE). 4Wire FSK (DCE). Aux.Port DCE DTE 6 Sep SA Preliminary User Guide 16 Dwg: A B

19 2. DCE Mode with KOD Handshaking. (Aux Port Normal Mode (DCE) and the KOD Function Enabled). This feature provides RTS handshaking from the fiber to the Data Ports. RTS is raised, 12ms later data flows, after the data stops RTS is lowered. Note FSK modems operating on two wires require RTS to be ON when transmitting and OFF when receiving. The KOD/RTS function was specifically designed to meet this type of requirement. Fiber Optics Data Ports + 5V Main Port (DB9F) 1 DCD AB Fiber Lines Line Drivers Data Flow Common Function 3 TXD 2 RXD 7 RTS 8 CTS Aux Port (RJ45) 7 CTS IFC-AXXXXX Local (DTE) 8 RTS 5 RXD 6 TXD 2 DCD KOD RTS IFC-A Wire FSK Modem (DCE) 3. DTE Operation at a Location. (Aux Port switched to DTE Mode) This feature allows the Main Port s attached DTE device (On Street ) to drive the fiber and appear as a DTE at the Auxiliary Port. The Auxiliary Port now looks like the On Street s DTE port complete with RTS/CTS Handshaking, this provides the necessary flow control for driving 2wire FSK Modems. The following drawing shows the signal flow information Fiber Optics Data Ports Main Port (DB9F) 3 TXD AB Fiber Lines Line Drivers Data Flow 2 RXD DCE 7 RTS 8 CTS Aux Port (RJ45) 7 CTS 8 RTS DTE 5 RXD 6 TXD DTE DCE On Street S.S.Radio (DCE). 4Wire FSK (DCE). Aux.Port DCE DTE 6 Sep SA Preliminary User Guide 17 Dwg: A B

20 Fiber Identification Techniques This method assumes the technician is dealing with the worst case i.e. no fibers are assigned or labeled at each modem location, just patchcords. Let s assume that we are installing a Daisy Chain down an arterial roadway, at each end of the system you will have only two fibers, therefore set these modems to Daisy Chain and all others leave on 2 Ring. At all locations in between there will be four fibers, two from downstream and two from upstream, all fibers are disconnected from the modems. 1. Starting at the location (City Hall) power up the modem and connect the two fibers into and. 2. At the next location power up the modem and connect each patchcord, one at time, into. When the modens display indicates 1, insert this fiber into. 3. The remaining three patchcords are then rotated through until you see the Fold Back display. 1 1 Note: City Hall will now have the Daisy Chain Display Continue steps 2 and 3 until you reach the end of the Daisy Chain. Middle (s) Middle (s) End 6 Sep SA Preliminary User Guide 18 Dwg: A B

21 Factory Default Settings The 2SA is shipped from the factory with the following DIP Switch settings enabled. Anti-Streaming times are additive, e.g = 6 seconds (max. time 126 sec) Aux. Off 2 Rings 1 Ring Daisy Chain Ring RS Off 2400 Off 9600 Off 19.2Kbts Off 38.4Kbts Off 57.6Kbts Off 115.2Kbts Off Parity None Odd Even RTS-CTS Off CTS-0ms 8ms Ant-Strm Off Off Aux.Port DCE DTE Data Port Pin Out Assignments RS-232 Female TXD GND 5 9 RXD DCD 1 6 CTS RTS NO CONNECTION PINS RS-232 RJ DCD 4 GND 5 RXD 6 TXD 7 CTS 8 RTS NO CONNECTION PINS 1-3 Pins Main Port DCE Data Flows Auxiliary Port DCE Data Flows 1 DCD Out NC 2 RXD Out DCD (KOD RTS) Out 3 TXD In NC 4 NC GND Common 5 GND Common RXD Out 6 NC TXD In 7 RTS In CTS Out 8 CTS Out RTS In 9 NC 6 Sep SA Preliminary User Guide 19 Dwg: A B

22 KOD Jumper KOD Jumper must be ON (Factory Default) for Dynamic DCD operation Aux-Ports Pin 2 Functions DCD or KOD Selection KOD ON = JP 5 Fiber Optics DCD ON = +5V Fiber Optics DIP Switches Auxiliary Ports Pin # 2 (DCD) has a dual function: 1. It can be set to +5Vdc; this is used to assert RTS on an attached modem. Use only at a 4W location, or two modems point to point 4W. 2. It can assert DCD dynamically before data, then de-assert DCD after data; this is used to handshake the built-in FSK modem. Use at a 2W or 2 or 4W location. 6 Sep SA Preliminary User Guide 20 Dwg: A B

23 Applications Self Healing Dual Counter Rotating Ring Operation TMC Computer RTU / RING 1 RING 2 RTU / 3 Dual Counter Rotating Ring Format 1 2 RTU / This format requires that two fibers to be connected from modem to modem until a dual counter-rotating ring is formed. The advantage of this format is that if there is a fiber cut between any modems or a modem failure, the adjacent modems straddling the malfunction will automatically fold back into Ring 2 causing the system to self heal by forming a new ring. See Foldback illustration on the next page. Modem DIP Switch Settings for N1 The Dip Switch settings listed below show what would be required to set the modems to operate at 9600baud 8N1, this is a typical setting for the traffic industry, all other switch positions not shown are in the Off position or other selection. Modem Modem 2 Rings 2 Rings RS232 RS None (Parity) None (Parity) RTS/CTS RTS/CTS CTS-0ms CTS-0ms Off Anti-Stream 2 Seconds Aux Port Normal Aux Port Modem 6 Sep SA Preliminary User Guide 21 Dwg: A B

24 Foldback Condition TMC Computer DATA RTU / RING 2 RING 1 RTU / 3 See Ring Status Displays Below 1 2 RTU / Under normal conditions all the modems would have a static display showing a two-ring operation. Normal Fiber Status With a failure of any or a cable cut, the adjacent modems would fold back to form a new ring, thus maintaining communications. Next a message is sent to all the other modems in the system to flash their displays once a second to indicate a ring fold-back has taken place. The above diagram shows a catastrophic event at 2, with the resulting graphics displays below. 3 1 Fold-Back indication Indicates Fiber Communications are good in this segment. Fold-Back indication 6 Sep SA Preliminary User Guide 22 Dwg: A B

25 Auxiliary Schemes for Dual Rings Set the rear dip switch to Aux a) Co-Located Aux TMC Computer RS232 Data cable used for "co- location" of Aux Main Data Port 1 Aux Data Port Main Data Port Aux If the fails the Auxiliary will take over. At the, switch the Aux Port to DTE operation, see page 17, #3 DTE Operation. Disaster Recovery b) Remote Located Aux Traffic Management Computer Center Remote Emergency Center for Disaster Recovery TMC Computer TMC Computer Main Data Port 1 Aux Main Data Port 1 In this example the and the Auxiliary are in separate locations, should a disaster occur at the main TOC the Auxiliary would then take over at the remote location. 6 Sep SA Preliminary User Guide 23 Dwg: A B

26 c) Remote Located Aux for Disaster Recovery on Linear Cable Installations GDI SS Radio GDI SS Radio Auxiliary Data Port Main Data Port 1 Ring 1 Fiber Optic Cable Ring 1 1 Ring 1 Cable Cut Ring 1 Ring 2 Ring 2 Ring 2 Ring 2 2 Ring 1 Ring 2 Fiber Optic Cable Ring 1 Ring 2 Aux 3 Main Data Port Auxiliary Data Port TMC Computer This type of installation has the placement of the fiber optic cable laid out in an open-ended string and not forming a closed loop or Cable Ring. The weakness here is that when there is a complete cable cut between any modem, down stream modems become isolated. This can be easily overcome by connecting a GDI SSR Radio at the location and one at the Aux location to form a radio bridge. Set the and Aux to DTE operation The same recovery technique can be achieved by replacing the radios with GDI Model 496 FSK modems operating over 2 or 4wire circuits. At the Aux location, use the KOD function to raise RTS to initialize the FSK transmission sequence. 6 Sep SA Preliminary User Guide 24 Dwg: A B

27 Single Ring Operation TMC Computer DATA RTU / RTU / 3 Single Fiber Loop 1 2 RTU / This configuration is useful when there is only one fiber available from modem to modem, it has the lowest security of all configurable systems, should the ring be broken then the system will collapse. Modem DIP Switch Settings for N1 The Dip Switch settings listed below show what would be required to set the modems to operate at 9600baud 8N1, this is a typical setting for the traffic industry, all other switch positions not shown are in the Off position or other selection. Modem Modem 1 Ring 1 Ring RS232 RS None None RTS/CTS RTS/CTS CTS-0ms CTS-0ms Off Anti-Stream 2 Seconds Aux Port Normal Aux Port Normal 6 Sep SA Preliminary User Guide 25 Dwg: A B

28 Single Ring Display In the Single Ring mode, all the displays will be static until there is a break in the ring, when this condition occurs all displays will flash, the modem that has lost it s input will flash a Loss Of Signal alarm () 1 The following displays indicate a progressive build out of a Single Ring Sep SA Preliminary User Guide 26 Dwg: A B

29 Point to Point Operation a) Point to Point with No Redundant Fiber Path Host Computer TMC Data Modem Fiber Path Modem Data RTU / In this situation we only have two fibers available, so we create a single ring, all operations and indications will be the same as the previous single ring setup. Modem DIP Switch Settings for N1 The Dip Switch settings listed below show what would be required to set the modems to operate at 9600baud 8N1, this is a typical setting for the traffic industry, all other switch positions not shown are in the Off position or other selection. Modem Modem 1 Ring 1 Ring RS232 RS None None RTS/CTS RTS/CTS CTS-0ms CTS-0ms Off Anti-Stream 2 Seconds Aux Port Normal Aux Port Normal 6 Sep SA Preliminary User Guide 27 Dwg: A B

30 b) Point to Point with Redundant Fiber Path Host Computer TMC Data Modem Cable 1 Fiber Cable 2 Modem Data RTU / Fiber Status Fiber Status Normal Normal The above shows a single Point to Point System with fail safe redundant fiber optics, if the primary path fails then the system will automatically run on the secondary (redundant) path. The best system security is obtained by running two separate cables following different paths, one cable has / fibers and the other has /, if one cable is completely severed the system will automatically recover via the other cable. Modem DIP Switch Settings for N1 The Dip Switch settings listed below show what would be required to set the modems to operate at 9600baud 8N1, this is a typical setting for the traffic industry, all other switch positions not shown are in the Off position or other selection. Modem Modem 2 Ring 2 Ring RS232 RS None None RTS/CTS RTS/CTS CTS-0ms CTS-0ms Off Anti-Stream 2 Seconds Aux Port Normal Aux Port Normal 6 Sep SA Preliminary User Guide 28 Dwg: A B

31 Status Display Fiber Status Fiber Status Normal Normal A failure of any receive fiber would cause the following fold-back indication to be displayed. 6 Sep SA Preliminary User Guide 29 Dwg: A B

32 Daisy Chain Operation a) Single String Daisy Chain TMC Computer DATA RTU / RTU / RTU / This configuration is used when there is no fiber ring available, only one pair of fibers available from controller to controller, a typical application would be a TMC feeding an arterial string and terminating at the far end. Note: This configuration has no redundant path, any failure along the string will cut off all down stream communications past the point of failure. Modem DIP Switch Settings for N1 The Dip Switch settings listed below show what would be required to set the modems to operate at 9600baud 8N1, this is a typical setting for the traffic industry, all other switch positions not shown are in the Off position or other selection. Note: Anti-Streaming is always off at a, optional for all Modems. Modem Middle s End 2 Ring 2 Ring 2 Ring 2 Ring Daisy Chain * Ring Ring Daisy Chain * RS232 RS232 RS232 RS None None None None RTS/CTS RTS/CTS RTS/CTS RTS/CTS CTS-0ms CTS-0ms CTS-0ms CTS-0ms Off Anti-Stream Anti-Stream Anti-Stream N.A. 2 Seconds 2 Seconds 2 Seconds Aux Port Normal Aux Port Normal Aux Port Normal Aux Port Normal 6 Sep SA Preliminary User Guide 30 Dwg: A B

33 Status Display Normal Fiber Indication (No Flashing Displays) Middle (s) Middle (s) End Note: To visually indicate the start and end of a Daisy Chain, set the end modems to Daisy Chain, this also turns off the indication for the unused receiver s and. 2 Rings Daisy Chain 1 Ring Ring 2 Rings 1 Ring Set all other modems to 2 Ring only. Fiber Alarm Notification (All Displays Flashing) Middle (s) Middle (s) End Indicates Fiber Communications are good on this segment. Fold-Back indication Indicates Fiber Communications are good on this segment. Next we show a cable cut anywhere in the mid span s, this results in isolating the down stream modems from the polling. Note the alarms on the modems adjacent to the cut, this indicates that the break is between the two modems, also note the fold-back symbol indicates the modem has communications to its adjacent modems but not across the break. The down-stream isolated modems are in communications with each other and will automatically come back on line when the break is repaired. 6 Sep SA Preliminary User Guide 31 Dwg: A B

34 Dual Daisy Chains (Center ) TMC Computer End DATA Middle (s) End RTU / RTU / RTU / The Center Modem can be located anywhere in the Daisy Chain. In some scenario s, the TMC may not be at the beginning, but somewhere in the middle of the arterial daisy chain. The above layout shows how to connect modems to both sides of the master. Normal Fiber Indication( No Flashing Displays) End Middle (s) End Note at the Modem you need to switch it to Center by selecting C-Mast 64 as well as Daisy Chain. Anti- Streaming is not used at a location. End Modem Middle s End Modem 2 Ring 2 Ring 2 Ring 2 Ring Daisy Chain * Daisy Chain * Ring Daisy Chain * RS232 RS232 RS232 RS None None None None RTS/CTS RTS/CTS RTS/CTS RTS/CTS CTS-0ms CTS-0ms CTS-0ms CTS-0ms Anti-Stream Off Anti-Stream Anti-Stream 2 Seconds C-Mast 64 * 2 Seconds 2 Seconds Aux Port Normal Aux Port Normal Aux Port Normal Aux Port Normal 6 Sep SA Preliminary User Guide 32 Dwg: A B

35 KOD Applications Note: See page 20 on how to set the KOD Jumper. Fiber to 2 Wire Application 2 Wire 4xx Modem OUT OUT 4xx Modem IN To TMC or Street RS Aux Port 2 Series Fiber Trunk Series Series Dual Counter Rotating Rings Main Port Set the internal DCD/ KOD Jumper in the 2SA to KOD On RS232 OUT 4xx Modem IN 2 Wire Fiber to 4 Wire Application 4 Wire OUT 4xx Modem IN 4xx Modem OUT IN To TMC or Street RS Aux Port 2 Series Fiber Trunk Series Series Dual Counter Rotating Rings Main Port Options (See Page 19) RS Set the internal KOD Jumper to DCD ON + 5VD (Continuous Transmit) Set the internal KOD Jumper to KOD ON (KOD Controls Transmission) 4 Wire OUT 4xx Modem IN 6 Sep SA Preliminary User Guide 33 Dwg: A B

36 Fiber to Copper to Fiber (Copper Bridge) Copper to Fiber to Copper (Fiber Bridge) To TMC or Street 2 or 4 wire Fiber Bridge IN 4xx Modem OUT Main Port Aux Port 7 RS xx Modem 3 2 OUT IN 7 4 wire RS232 RS232 IN 4xx OUT Modem Aux Port Aux Port 2 IN 4xx OUT Modem Series Series Fiber Series Series Main Port Main Port Set the internal DCD/KOD Jumper in the 2SA to KOD On Set the internal DCD/KOD Jumper in the 2SA to DCD ON + 5VDC for 4 Wire or KOD ON for 2 Wire. RS232 Note: You can have 4 Wire on one side of the Fiber Bridge and 2 Wire on the other. All Bridge s connecting to 2 Wire circuits must have KOD ON The Bridge must have KOD ON for 2 and 4 Wire circuits. The Bridge can be set to DCD ON + 5VDC for 4 Wire circuits. 6 Sep SA Preliminary User Guide 34 Dwg: A B

37 GDI Communications LLC Technical Services Bulletin #1 CARE AND HANDLING PROCEDURES FOR OPTICAL CONNECTORS Author TONY ILETT Cleanliness Is Very Important When Handling Fiber Optics Specs of dust which are invisible to the human eye, oil or grease from fingers can contaminate the end surfaces of an optical connector and reduce it s coupling efficiency to the point of causing a system to fail. To put things into perspective the end face of an optical connector is 2.5mm in diameter. In the center of this is our optical wave-guide or glass fiber; this has a diameter of 125 microns (125 millionth of a meter) and is about the size of a human hair. In the center of this glass fiber is an area called the Core, which in Multimode fiber is 50 or 62.5microns in diameter and is invisible to the naked eye, it is this core that carries our optical signal. As stated Multimode core diameters are usually 50 microns (Europe) or 62.5 microns (North America), but in the long haul, high bandwidth world of Singlemode fibers the core size is 80% smaller than the fibers diameter of 125 microns and measures less than 10 microns across! It should now be obvious that a spec of dust, invisible the naked eye, can prevent your communications system from working, so: KEEP IT CLEAN! Materials needed to clean Optical Patchcords 1. Wet Method Typically these are lens grade tissue pre-moistened with a solvent that has a concentration of 90% or better of Isopropyl Alcohol and sealed in a foil sachet. or A lens grade tissue, which is then moistened with 90% or better Isopropyl Alcohol. Do not use rubbing alcohol as this contains oil for lubrication and will leave a smear or film which will degrade the Optical Return Loss and also cause particulate matter to stick to it. or Dry Method This involves using a special device that looks like a small videocassette tape containing a paper like material instead of magnetic tape. The connectors ferrule is inserted into an opening and the tape is wound on thus polishing the end face. There are several versions of this device readily available from supply houses. 6 Sep SA Preliminary User Guide 35 Dwg: A B

38 Note: This only polishes the end surface and does not clean the ferrules cylindrical surface that contributes to axial alignment. 2. Air Duster A can of compressed inert gas with a plastic extension tube. Make sure that any liquid propellant has been discharged from the tube before using on the optics. 3. Lint Free Tissues Lint free tissues used to clean fiber optic surfaces. Does not introduce any contaminates. Always keep sealed in a Ziploc bag to avoid contamination when not in use. Do not re-use the tissue, discard it. 4. Dust Caps A supply of Clean Dust Caps, note that there are two sizes, one for connectors, the other one is slightly smaller and is used for the optical ports on patch-panels and transmission devices. Store them in a Clean Zip-Lock Bag. The following scenario outlines the steps taken when disconnecting and then re-mating one end of a Patchcord from an optical device, such as a patch-panel or transmission equipment. WARNING! Invisible Laser Energy Can Damage Your Eyes Do not look into the end of an Optical Connector that is attached to a fiber, it may be emitting potentially harmful energy that can damage your eyes, first disconnect the other end or turn the power Off on the transmitting device. Do not look into the transmitting port of an Optical Transmitter with out first turning the power Off to that device. Note: Visible Red LED s (820nm Multimode) are low power devices that can be viewed at a safe distance of two to three feet. Disconnecting the Optical Connector 1. Any accumulation of dust that has settled around the optical connectors must first be removed by using short bursts of compressed air from the Air Duster. In high dust areas use pre-moistened tissues or lint free tissues moistened with alcohol to wipe off 6 Sep SA Preliminary User Guide 36 Dwg: A B

39 excessive dust and then use the Air Duster, this will reduce the possibility of dust contaminating the optical connector as well as the optical receptacle. Do not re-use a tissue, discard it. 2. Disconnect the optical connector and put a clean protective dust cap over the end. If you don t have a dust cap use a clean Ziploc bag or worst case temporary suspend the connector in free air and make sure it does not touch any other surface. Do not leave the exposed receptacle without any protection; cap it with a clean dust cap! Reconnecting the Optical Connector 1. Remove the dust cap from the end of the optical connector (if fitted) and store in a clean Ziploc bag for future use at this site. Do not touch the ferrules surfaces with your fingers! 2. Using the Air Duster, use short bursts to clear any dust from the connector, particularly from the ferrule area. 3. Remove the Optic Prep Wipe from a sealed sachet and start the cleaning process. Do not put the wipe down on any surface as this will contaminate it and render it useless. Using this clean pad, clean the end face of the ferrule and its circumference. Do not be afraid to apply pressure when cleaning, use the same pressure as if you were cleaning eyeglasses. 4. Using the Air Duster, use a single short burst to clean and dry the ferrule before starting the re-connecting process. Do not touch the ferrule again as you might contaminate it. 5. Remove the dust cap from the mating receptacle and store in the clean Ziploc bag for future use. 6. Hold the connector locking mechanism between thumb and forefinger. Allow the little finger to steady the hand by holding it against the chassis or patch-panel during the insertion process. With the little finger in contact with the panel, there is a reduced chance of the ferrule touching any contaminated non-mating surfaces. 7. Insert the ferrule into the receptacle and slowly rotate the connector until the key aligns itself with the receptacles keyway, then push the connector home and engage the connectors locking mechanism. Do not force the connector; it should be a snug fit. 6 Sep SA Preliminary User Guide 37 Dwg: A B

40 Drawing Number Release Date Comments A Oct 2005 Original A B 6 Sep 2006 Page 16 DCD KOD RTS corrected to show pin 2 instead of pin 1. Page 18 DCD (KOD RTS) output removed from pin1 DB9 Main Port to Aux Port pin 2. Page 19 added to show KOD location. Page 32 &33 added to show KOD Application Drawings. Contents of this user guide may not be copied or published without the written consent of GDI Communications LLC, Verdi, Nevada. The contents of this user guide are deemed to be correct at the time of publishing and are offered as a guide only; GDI Communications LLC is not liable for any inaccuracies or omissions. 6 Sep SA Preliminary User Guide 38 Dwg: A B