TPT 10BASE-T TWISTED PAIR TRANSCEIVER USER’S MANUAL CABLETRON SYSTEMS, P.O.
NOTICE The information presented in this document, including descriptions of hardware, firmware, and software, is subject to change without notice and should not be construed as a commitment by Cabletron Systems. Cabletron Systems assumes no responsibility for any errors that may appear in this manual. The reader should in all cases contact Cabletron Systems to determine whether changes have been made affecting the manual.
FCC NOTICE FCC NOTICE WARNING: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment uses, generates, and can radiate radio frequency energy and if not installed in accordance with the operator's manual, may cause harmful interference to radio communications.
CONTENTS CHAPTER 1 - INTRODUCTION 1.1 1.2 1.3 USING THIS MANUAL...............................1-1 GETTING HELP .........................................1-2 THE TPT 10BASE-T TWISTED PAIR TRANSCEIVER..........................................1-3 CHAPTER 2 - REQUIREMENTS AND SPECIFICATIONS 2.1 2.2 NETWORK DESIGN GUIDELINES ...........2-1 OPERATING SPECIFICATIONS ...............2-5 CHAPTER 3 - INSTALLING THE TPT 3.1 3.2 3.3 UNPACKING THE TPT ..............................3-1 MOUNTING THE TPT................
Contents 3.3.3 3.3.4 Connecting the TPT to a Twisted Pair Segment ................................ 3-5 Providing Strain Relief................... 3-8 CHAPTER 4 - TESTING AND TROUBLESHOOTING 4.1 4.2 iv INSTALLATION CHECK-OUT ................... 4-1 USING LANVIEW ......................................
CHAPTER 1 INTRODUCTION Welcome to Cabletron Systems’ TPT™ 10BASE-T Twisted Pair Transceiver User’s Manual. We have designed this manual as a simple installation and reference guide to the TPT. The TPT provides 10BASE-T compliant twisted pair connectivity to your Ethernet network.You should read this manual thoroughly to fully understand the TPT and its capabilities. 1.1 USING THIS MANUAL Chapter 1, Introduction, is an overview of the TPT 10BASE-T Twisted Pair Transceiver.
INTRODUCTION Chapter 3, Installing the TPT, contains steps for unpacking the TPT, setting the SQE switch, connecting the transceiver to the network, and connecting the transceiver to an Ethernet device. Chapter 4, Testing and Troubleshooting, contains procedures for verifying that the TPT is operational. It also describes the LANVIEW™ LEDs, and how you can use them to troubleshoot network problems. Before you install the TPT, you should have a general working knowledge of Ethernet or IEEE 802.
INTRODUCTION 1.3 THE TPT 10BASE-T TWISTED PAIR TRANSCEIVER Connections The TPT (Fig. 1-1) is designed to connect two Ethernet devices. Because the TPT is small, it can connect to Ethernet devices directly, or you can connect it by means of an AUI cable. The TPT fully conforms to IEEE 802.3 10BASE-T specifications and guarantees the flexibility to connect to networks using IEEE 802.3 or Ethernet Version 1 or 2 equipment.
INTRODUCTION The TPT 10BASE-T Twisted Pair Transceiver lets you use existing twisted pair wiring as part of an Ethernet network. Distance and Cable Type The TPT supports an unshielded twisted pair (UTP) segment, up to 100 meters (328 feet) of 24 AWG UTP with an impedance of 85-110 ohms. Signal Quality Error (SQE) Test The TPT has a Signal Quality Error (SQE) Test Switch that lets you turn on or off the SQE (“heartbeat”) test function.
INTRODUCTION host, regardless of the polarity of the twisted pair segment’s receive link. If polarity is reversed, the LANVIEW LNK (Link) LED will flash. NOTE: If you have a polarity mismatch, you should remove the segment from the TPT and correct the problem. This will make the segment compatible with a device that does not have the Polarity Detection and Correction feature. LANVIEW LEDs The TPT incorporates Cabletron Systems’ LANVIEW diagnostic and monitoring system.
INTRODUCTION 4 2 1 3 1. 2. 3. 4. 5. 6. 6 5 Workstation TPT (directly attached to Workstation) Twisted Pair Jumper Wall Plate Twisted Pair Cable MMAC with TPMIM Figure 1-2 Typical TPT Setup For example, the twisted pair segment (3) can be a jumper to a wall plate (4). From the wall plate, a twisted pair cable (5) in the building’s distribution wiring runs to a distribution closet.
CHAPTER 2 REQUIREMENTS AND SPECIFICATIONS This chapter describes the network requirements for connecting the TPT 10BASE-T Twisted Pair Transceiver to a twisted pair segment and an Ethernet device. The chapter also lists specifications and power requirements. Review all specifications, guidelines, and requirements in this chapter before you install the TPT. You must meet all these conditions to ensure satisfactory performance of your network. 2.
REQUIREMENTS AND SPECIFICATIONS 100 meter (328 ft.) link using 22-26 AWG unshielded twisted pair wire. As a general rule, links up to 150 meters (492 ft.) for unshielded twisted pair and 200 meters (656 ft.) for shielded twisted pair are possible. For each connector or patch panel inthe link, subtract 12 meters (39 ft.) from the 150 meter limit.This allows for links of up to 126 meters (413 ft.) using standard 24 AWG UTP wire and two patch panels within the link.
REQUIREMENTS AND SPECIFICATIONS the cable. Since the cable is shielded, signal reflection has little effect on the received signal’s quality, due to the lack of crosstalk between the shielded cable pairs. Cabletron Systems’ 10BASE-T Twisted Pair products work on shielded twisted pair cable with 75 to 165 ohms impedance. • Jitter - Intersymbol interference and reflections can cause jitter in the bit cell timing, which results in data errors. A 10BASE-T link must not generate more than 5.0 ns of jitter.
REQUIREMENTS AND SPECIFICATIONS data errors if the impulses occur at very specific times during data transmission. Generally, you do not need to be concerned about noise. If you suspect noise related data errors, either reroute the cable or eliminate the source of the impulse noise. • 2-4 Temperature - Most multi-pair PVC 24 AWG telephone cables typically have an attenuation of approximately 8 to 10 dB/100 m at 20° C (68°F). The attenuation of PVC insulated cable varies significantly with temperature.
REQUIREMENTS AND SPECIFICATIONS 2.2 OPERATING SPECIFICATIONS This section contains the specifications, power supply requirements, and environmental guidelines for the TPT. Cabletron Systems reserves the right to change these specifications at any time without notice. The TPT is designed and manufactured in accordance with the IEEE 802.3 10BASE-T standard. INTERFACE CONNECTIONS Figure 2-1 shows the pin connections for the RJ-45 receptacle on the TPT.
REQUIREMENTS AND SPECIFICATIONS 12345678 Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 TX+ TXRX+ No Connection No Connection RXNo Connection No Connection Figure 2-1 2-6 RJ-45 Pin Connections
REQUIREMENTS AND SPECIFICATIONS 4 Logic Ref 5 Receive + 3 Transmit + 6 Power Return 2 Collision + 7 No Connection 1 Logic Ref 8 Shield 9 Collision - 15 No Connection 10 Transmit - 14 Shield 11 Shield 13 Power (+12VDC in) 12 Receive - Type: 15 Position D Type Receptacle Pin Connector Shell: Connected to TPT enclosure Figure 2-2 AUI Pin Connections 2-7
REQUIREMENTS AND SPECIFICATIONS POWER SUPPLY Parameter Typical Value Worst Case Input Voltage: 12 V 9.5 to 15 V Total Current Draw: 170 mA 210 mA max.
REQUIREMENTS AND SPECIFICATIONS Electromagnetic Susceptibility: Will operate properly in the following externally applied fields: 10 kHZ to 30 MHz @ 2 V/m 30 MHz to 1000 MHz @ 5 V/m Electromagnetic Radiation: Meets FCC part 15, Class A Limits. SAFETY Designed in accordance with UL478, UL910, NEC725-2(b), CSA, IEC, TUV, VDE Class A. Meets FCC part 15, Class A limits.
REQUIREMENTS AND SPECIFICATIONS PHYSICAL Dimensions: 9.9 x 4.1 x 2.0 cm 3.7 x 1.6 x .8 in Weight: 68 gm .
CHAPTER 3 INSTALLING THE TPT This chapter outlines the procedure for connecting the TPT to your network. Be sure that all specifications and requirements listed in Chapter 2, Requirements and Specifications, are met before you install the TPT. 3.1 UNPACKING THE TPT To unpack the transceiver: 1. Remove the accessory bag from the shipping box, and make sure it contains the following: • • • one set of Velcro® mounts two 6 inch cable ties two mounting bases for the cable ties 2.
INSTALLING THE TPT 3.2 MOUNTING THE TPT Using the contents of the accessory package, you can mount the TPT on a surface close to the workstation, or on the workstation itself. The surface you choose should meet the following requirements: • Allows the twisted pair segment to be easily connected to the transceiver • Allows an AUI cable to be easily connected to the transceiver • Has a smooth, dirt free surface that will accept the adhesive bonds Mount the TPT as follows: 1.
INSTALLING THE TPT 5. Mount the transceiver by attaching the Velcro-backed TPT to the Velcro mount. 3.3 CONNECTING THE TPT TO THE NETWORK After you are sure that you have met all the requirements listed in Chapter 2, complete the installation instructions listed in this section. 3.3.1 Setting the SQE Switch The SQE Test switch lets you enable or disable the SQE test function. The SQE switch is the two-position slide switch on top of the TPT.
INSTALLING THE TPT To set the SQE switch: • To turn the SQE test function off, slide the SQE switch toward the RJ-45 port. This should align the switch with the off position (°). • To turn on the SQE test function, slide the SQE Switch toward the AUI port. This aligns the switch with the on position (•), as indicated on the front of the TPT. 3.3.2 Connecting the TPT to an Ethernet Device The TPT connects directly to an Ethernet device through an AUI connection.
INSTALLING THE TPT If the PWR LED is not lit: 1. Make sure that the power is turned on for the device attached to the TPT. 2. Disconnect the device to which the transceiver is attached. 3. Check the AUI connections for proper pinouts. The pinouts for the transceiver connection are listed in Chapter 2. 3.3.
INSTALLING THE TPT 10BASE-T Device TPT Tranceiver RX+ RX- TX+ TX- TX+ TX- RX+ RX+ Figure 3-1 Twisted Pair Connection To connect the TPT to your network (Fig. 3-3) 1. Connect the twisted pair segment to the TPT by inserting the RJ-45 connector on the segment into the RJ-45 port on the transceiver. 2. Verify that the LNK LED on the transceiver is lit.
INSTALLING THE TPT • Reconnect the RJ-45 connector to the RJ-45 port of the TPT. If a link still has not been established, contact Cabletron Systems’ Technical Support. NOTE: If link has been established, but the LNK LED flashes on and off, the polarity of the cable is reversed in the receive pair of the twisted pair segment. The TPT has a self correcting feature that allows it to continue operating without having to rewire the RJ-45 connector.
INSTALLING THE TPT 3.3.4 Providing Strain Relief for the TPT We recommend that you support the cabling attached to the TPT-4 to relieve the stress on the connections. To support the UTP segment and AUI cable: 1. Mark the location where you want to place the mounting bases for the cable ties. To provide maximum strain relief to the cables, support should be provided about 4" from the TPT-4’s RJ-45 port, and if necessary, near the end of the built-in AUI cable extending from the TPT-4. 2.
CHAPTER 4 TESTING AND TROUBLESHOOTING This chapter contains procedures for testing the TPT 10BASE-T Twisted Pair Transceiver. This chapter also explains the function of the LANVIEW LEDs. 4.1 TESTING THE TPT This section contains procedures to test the TPT to ensure that it is operating properly. For the procedures in this section, you will need two Ethernet node testers, such as the Cabletron Systems’ LAN-MD™, that are capable of generating valid data packets. 1. Connect the TPT (2, Fig.
TESTING AND TROUBLESHOOTING 3. Attach a crossed-over twisted pair segment (3) between the two transceivers. 1 5 2 3 Figure 4-1 4. 4-2 4 1. LAN-MD 2.TPT (directly attached to LAN-MD) 3.Twisted Pair Segment 4.TPT (directly attached to LAN-MD) 5.LAN-MD Installation Checkout Select and run test 6, SERVER, on the LAN-MD connected in step 1.
TESTING AND TROUBLESHOOTING LAN-MD 1 now acts as the SERVER unit and will echo packets when used with the other LAN-MD. 5. Select and run test 4, NODE, on the LAN-MD connected in step 2. Verify that the NODE 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 segment. When the TPT has passed the NODE test, it is ready for normal operation.
TESTING AND TROUBLESHOOTING Power (PWR) LED When lit, this green LED indicates that the transceiver is receiving power though its AUI connection. If the PWR LED is not lit, power is not being received from the device, or the DC-to-DC converter in the transceiver has failed. SQE EIVER LNK COL RCV XMT SQE SN Figure 4-2 PWR LANVIEW LEDs LANVIEW LEDs Signal Quality Error (SQE or “Heartbeat”) Test Function (SQE) LED When lit, this yellow LED indicates that the transceiver’s SQE test function is on.
TESTING AND TROUBLESHOOTING The SQE test is used to ensure that the collision presence circuit and the path between the Ethernet device and the transceiver are operational. This test is generated by the transceiver after a data packet has been transmitted through the transceiver. Transmit (XMT) LED This green LED flashes while a data packet is being placed onto the network by the device connected to the transceiver. The LED flash is pulse-stretched for viewing effect.
TESTING AND TROUBLESHOOTING Media Link Good (LNK) LED When lit, this green LED indicates that a link exists between the transceiver and the 10BASE-T device at the other end of the twisted pair segment. The LNK LED remains lit as long as the link is maintained. A regular continuous flash means that the receive pair on the twisted pair segment is wired with the polarity reversed. The TPT will operate normally due to the Polarity Detection and Correction feature.
