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Page 4 - 1

TESTING AND TROUBLESHOOTING

CHAPTER 4

TESTING AND TROUBLESHOOTING

This chapter lists procedures to test the FOT-F3 Fiber
Optic Transceiver after it has been connected to the
network.  A description of LANVIEW and its function in
troubleshooting physical layer network problems are also
given.

4.1  INSTALLATION CHECK-OUT

This section contains procedures to test:

•

The fiber optic link segment to be attached to the
FOT-F3.

•

The FOT-F3 after it has been installed to ensure that
the physical layer of the network is operating properly.
Two Ethernet node testers capable of generating valid
data packets,such as the LAN-MD, are required for
this procedure.

Содержание FOT-F3

Страница 1: ...FOT F3 FIBER OPTIC TRANSCEIVER USER S MANUAL CABLETRON SYSTEMS P O BOX 5005 Rochester NH 03867 0505 ...

Страница 2: ...SPECIAL OR CONSEQUENTIAL DAMAGES WHATSOEVER INCLUDING BUT NOT LIMITED TO LOST PROFITS ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION CONTAINED IN IT EVEN IF CABLETRON SYSTEMS HAS BEEN ADVISED OF KNOWN OR SHOULD HAVE KNOWN THE POSSIBILITY OF SUCH DAMAGES Copyright October 1991 by Cabletron Systems Inc P O Box 5005 Rochester NH 03867 0505 All Rights Reserved Printed in the United States...

Страница 3: ...esidential area is likely to cause interference in which case the user will be required at his own expense to correct the interference If this equipment does cause interference to radio or television 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 Re orient the receiving antenna Relocate ...

Страница 4: ... INSTALLATION REQUIREMENTS SPECIFICATIONS 2 1 Network Design Guidelines 2 1 2 1 1 Fiber Optic Requirements 2 2 2 1 2 AUI Requirements 2 3 2 2 Operating Specifications 2 3 CHAPTER 3 INSTALLING THE FOT F3 3 1 Unpacking the FOT F3 3 1 3 2 Connecting FOT F3 to the Network 3 2 3 2 1 Setting the SQE Switch 3 2 3 2 2 Connecting the AUI Cable 3 4 3 2 3 Connecting the Fiber Optic Cable 3 5 ...

Страница 5: ...g the FOT F3 3 8 3 4 Cable Support Installation 3 9 CHAPTER 4 TESTING AND USING LANVIEW 4 1 Installation Checkout 4 1 4 1 1 Testing the Fiber Optic Link Segment 4 2 4 1 2 Testing the FOT F3 Fiber Optic Transceiver 4 3 4 2 Using LANVIEW 4 6 ...

Страница 6: ...ode fiber optic cable The FOT F3 uses the same signaling protocols specified by FOIRL and is completely IEEE 802 3 compatible at the AUI interface the AUI port connects the transceiver to a device or workstation via an AUI cable You should read through this manual to gain a full understanding of the FOT F3 transceiver and its capabilities 1 1 USING THIS MANUAL Chapter 1 Introduction discusses the ...

Страница 7: ... an active Ethernet device and if desired mounting the transceiver with the Velcro mounts provided with the unit Chapter 4 Testing and Troubleshooting contains procedures for verifying the proper installation of the FOT F3 It also describes LANVIEW LEDs and their function You should have a general working knowledge of Ethernet or IEEE 802 3 type data communications networks and their physical laye...

Страница 8: ...ices such as repeaters multiport repeaters multiport transceivers or host systems can be connected using fiber optic cable The FOT F3 is fully compatible with IEEE 802 3 and uses the same signaling specified in FOIRL specifications It provides the flexibility to connect to networks using Ethernet Version 1 Version 2 and or IEEE 802 3 equipment through an AUI port However the FOT F3 uses 1300 nm wa...

Страница 9: ...ce and Cable Type The FOT F3 supports single mode fiber optic cable for sizes such as 8 3 125 µm 8 7 125 µm 9 125 µm and 10 125 µm You can also use multi mode cable such as 62 5 125 µm but signal distance will be much shorter The signal distance is dependent on the cable type and the overall system fiber optic budget If the system budgets and timing constraints are met then a distance of over ten ...

Страница 10: ...onal between the FOT F3 and the Ethernet device attached to the transceiver s AUI port The SQE test signal is generated after the FOT F3 has transmitted a data packet This signal is generated only between the FOT F3 and the device it will not be transmitted onto the network The SQE Test must not be used when the FOT F3 is attached to a repeater or Ethernet Version 1 equipment LANVIEW LEDs The FOT ...

Страница 11: ...h a FOMIM 32 36 38 The MMAC serves as an intelligent repeater hub that links the fiber optic link segment to other network segments regardless of media type The link segment is attached to an FOT F3 3 An Ethernet device such as a workstation 1 is connected to the FOT F3 through an AUI cable 2 Figure 1 2 FOT F3 Setup Example 1 1 Workstation 2 AUI Cable 3 FOT F3 4 Fiber Optic Link 5 MMAC with Fiber ...

Страница 12: ...hy fiber optic link segment 4 up to ten kilometers runs from the FOT F3 and to a Cabletron Systems NB25 bridge 7 Through the bridge the host device communicates with other devices on a larger Ethernet network attached to the bridge s AUI port Figure 1 3 FOT F3 Setup Example 2 1 2 3 4 5 6 7 1 MMAC 2 AUI Cable 3 FOT F3 4 Fiber Optic Link 5 FOT F3 6 AUI Cable 7 NB25 Bridge ...

Страница 13: ... supplement the procedures and other technical data provided in this manual The procedures contained in the manuals below will be referenced only Cabletron Systems LAN MD Portable Ethernet Tester User s Manual Cabletron Systems FOMIM 32 36 38 Fiber Optic Interface Module Installation Guide ...

Страница 14: ...w the operating specifications and environmental requirements which are also listed All conditions guidelines specifications and requirements included in this chapter must be met to ensure satisfactory performance of the FOT F3 Failure to follow these guidelines may result in unsatisfactory network performance 2 1 NETWORK DESIGN GUIDELINES The following design guidelines must be met when connectin...

Страница 15: ...e level of 10 0 dB or less for any given single mode fiber optic link When determining the maximum fiber optic cable length the fiber optic budget and total network propagation delay should be calculated and taken into consideration before fiber runs are incorporated in any network design Fiber optic budget is the combination of the optical loss due to the fiber optic cable in line splices and fib...

Страница 16: ...d to the AUI port The AUI cable must not exceed 50 meters 164 feet in length If 28 AWG AUI cable is used then the maximum cable length is limited to 16 meters 50 feet 2 2 OPERATING SPECIFICATIONS This section contains the specifications power supply requirements and environmental guidelines for Cabletron Systems FOT F3 Cabletron Systems reserves the right to change these specifications at any time...

Страница 17: ... dBm 12 0 dBm Output Power 0 15 0 12 0 18 Coefficient dBm C dBm C dBm C NOTE Transmitter Power decreases as temperatures rise and increases as temperatures fall Use the Output Power Coefficient to calculate increased or decreased power output for your operating environment For example the typical power output at 25 C is 16 4 dBm For a 4 C temperature increase multiply the typical coefficient 0 15 ...

Страница 18: ...han 10 10 bit error rate NOTE The transmitter power levels and receive sensitivity levels given above are Peak Power Levels after optical overshoot You must use a Peak Power Meter to correctly compare the values given above to those measured on any particular port If you are measuring power levels with an Average Power Meter add 3 dBm to the measurement to correctly compare those measured values t...

Страница 19: ... 2 1 Pin 1 Logic Ref Pin 9 Collision 2 Collision 10 Transmit 3 Transmit 11 Logic Ref 4 Logic Ref 12 Receive 5 Receive 13 Power 12 Vdc 6 Power Return 14 Logic Ref 7 No Connection 15 No Connection 8 Logic Ref Shell Cable Shield and FOT F3 Case Figure 2 1 AUI Pin Connections 1 8 9 15 ...

Страница 20: ...2 2 which are explained in detail in Chapter 4 Testing and LANVIEW PWR Power When lit this LED indicates that the FOT F3 is receiving power green indicator SQE Signal test Quality Error When lit this LED indicates that SQE is enabled yellow indicator Figure 2 2 LANVIEW LEDs ...

Страница 21: ...from the network yellow indicator CLN Collision This LED flashes to indicate that the FOT F3 is detecting a collision on the network red indicator LNK Link OK When lit this LED indicates that a link has been established between the FOT F3 and the device at the other end of the fiber optic link segment green indicator POWER SUPPLY Parameter Typical Worst Value Case Current 425 mA 475 mA Input Volta...

Страница 22: ...8 UL910 NEC 725 2 b CSA IEC TUV VDE class A Meets FCC Part 15 Class A limits WARNING It is the responsibility of the person who sells the system of which the FOT F3 will be a part to ensure that the total system meets allowed limits of conducted and radiated emissions PHYSICAL Dimensions 3 25 H x 6 W x 0 88 D inches 8 3 x 15 2 x 2 2 cm Weight 7 2 oz 205 g ...

Страница 23: ...n Requirements Specifications are met before installing the transceiver 3 1 UNPACKING THE FOT F3 Before you install the FOT F3 you should visually inspect the transceiver and check the contents of the accessory package To unpack the transceiver 1 Carefully remove the transceiver from the shipping box Save the shipping box and materials in the event the transceiver has to be reshipped 2 Remove the ...

Страница 24: ...nstallation instructions listed in this section NOTE Ensure that the site where the FOT F3 will be located will allow the AUI cable and the fiber optic link segment to be easily connected to the transceiver before you begin the installation procedures 3 2 1 Setting the SQE Switch The Signal Quality Error SQE Test Switch allows you to enable or disable the SQE heartbeat test function The SQE switch...

Страница 25: ...e the SQE test function set the switch Fig 3 1 towards the optical ports to the off o setting To enable the SQE test function set the switch Fig 3 1 away from the optical ports to the on setting on the label Figure 3 1 SQE Switch LNK LNK CLN CLN RCV RCV X M T X M T SQE SQE PWR PWR S Q E S Q E SQE SWITCH SQE SWITCH SQE ENABLED SQE ENABLED SQE DISABLED SQE DISABLED TX TX R X R X 1300nm 1300nm ...

Страница 26: ...evice to which the FOT F3 will be connected 2 Attach the female connector on the AUI cable to the AUI port on the FOT F3 If the power is on for the Ethernet device the PWR LED should be lit indicating the transceiver is receiving power from the device Also the SQE LED should be lit if the SQE test is enabled Figure 3 2 AUI Connection Slide Latch AUI Port AUI Connector A U I ...

Страница 27: ...roper pinouts The pinouts for the transceiver connection are listed in Chapter 2 e Check the cable for continuity f Reconnect the AUI cable to the FOT F3 and the device 3 Move the slide lock on the AUI connector to secure it to the lock posts on the port 3 2 3 Connecting the Fiber Optic Cable This section describes how to connect the fiber optic link segment to the FOT F3 Perform the following ste...

Страница 28: ...The connector is inserted into the port with an alignment key on the connector inserted into the alignment slot on the port The connector is then turned to lock it down NOTE Do not touch the ends of the fiber optic strands and do not let ends come in contact with contaminants Contamination of the ends can cause problems in data transmissions If the ends become contaminated clean them with a soft c...

Страница 29: ... bottom port labeled RX on the FOT F3 3 Attach the fiber labeled 2 to the top port labeled TX 4 At the other end of the fiber optic cable attach the fiber labeled 1 to the transmit port of the device 5 Attach the fiber labeled 2 to the receive port ST Fiber Optic Ports ST Connectors ...

Страница 30: ...cted to each port c Reverse the fiber optic cable ends at one end of the fiber optic link segment If a link has not been established contact Cabletron Systems Technical Support 3 3 MOUNTING THE FOT F3 Using the contents of the accessory package you can mount the FOT F3 on a surface close to the workstation or on the workstation itself The surface you choose should meet the following requirements A...

Страница 31: ... paper that covers the adhesive backing of one Velcro mount 3 Carefully position the Velcro on the back of the FOT F3 Be sure to press firmly so that the adhesive firmly affixes 4 Similarly place the other half of Velcro on the surface on which you want to mount the FOT F3 5 Attach the FOT F3 to the Velcro mount 3 4 CABLE SUPPORT INSTALLATION Some attempt should be made to strain relief the cables...

Страница 32: ...tic ports 2 Repeat step 1 placing the other cable mount four inches from the AUI port 3 Strain relief each cable to its respective cable mount by using the tie wraps To strain relief the cables for a FOT F3 that is not wall mounted 1 If possible use long tie wraps to secure the FOT F3 to a structural item such as a beam or a rafter 2 Using additional long tie wraps strain relief each cable to the ...

Страница 33: ...Page 3 11 INSTALLATION Figure 3 4 Mounting the FOT F3 DEVICE FOT F3 Tie Wraps Fiber Optic Segment Cable Mounts AUI Cable ...

Страница 34: ...unction in troubleshooting physical layer network problems are also given 4 1 INSTALLATION CHECK OUT This section contains procedures to test The fiber optic link segment to be attached to the FOT F3 The FOT F3 after it has been installed to ensure that the physical layer of the network is operating properly Two Ethernet node testers capable of generating valid data packets such as the LAN MD are ...

Страница 35: ...d be set at 1300 nm 2 Attach a fiber optic jumper to the optical source unit If the source unit has multiple settings it should be set at 1300 nm 3 Using a barrel connector connect the jumpers together 4 Following the instructions for the test set test the jumpers to get a reference level Make a note of this reading 5 Disconnect the jumpers from the barrel connector 6 Using the jumper attach the o...

Страница 36: ... that the reading on the receive unit matches the specifications listed in the Fiber Optic Interface section of Chapter 2 11 Repeat steps 6 10 for the other strand in the link segment If the fiber optic link segment does not meet the specifications try cleaning the connection at each end of the cable with a soft clean lint free cloth with alcohol then repeat the test 4 1 2 Testing the FOT F3 Fiber...

Страница 37: ...Page 4 4 TESTING AND TROUBLESHOOTING 1 LAN MD 5 FOT F3 2 AUI Cable 6 AUI Cable 3 FOT F3 7 LAN MD 4 Fiber Optic Segment Figure 4 1 Installation Checkout ...

Страница 38: ...ED should also be lit on the LAN MD This LAN MD now acts as the SERVER unit and will act as a packet echoer when used with another LAN MD 4 Select and run test 4 NODE on the LAN MD connected in step 2 Verify that this test passes At least 100 packets should be sent and received with no errors The packets will be received and sent back from the SERVER LAN MD that was left running on the other segme...

Страница 39: ...ure 4 2 Optical Link OK LNK LED When lit this green LED indicates that a link has been established between the receive circuitry of the FOT F3 and the transmit circuitry of the fiber optic device at the other end of the fiber optic link segment This LED remains lit as long as the link is maintained To ensure that a link is maintained the transceiver generates a 1 MHz idle signal when it is not tra...

Страница 40: ...es to indicate that the transceiver is receiving a data packet from the network The flash of the LED is pulse stretched for viewing effect The LED will flash when traffic is on the network even if the data is not intended for the device attached to the FOT F3 LNK CLN RCV XMT SQE PWR SQE TX RX 1300nm ...

Страница 41: ...test function is enabled in the transceiver When the LED is not lit this indicates that the SQE test is not enabled The SQE test is used to ensure that the collision presence circuit and path are operational between the FOT F3 and the Ethernet device attached to the AUI port This test is generated by the transceiver after a data packet has been transmitted through the transceiver Power PWR LED Whe...

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