Related Manuals for Cabletron Systems MT-800
Summary of Contents for Cabletron Systems MT-800
- Page 1 MT-800 MULTIPORT TRANSCEIVER USER'S MANUAL CABLETRON SYSTEMS, P.O. Box 5005, Rochester, NH 03867-0505...
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Page 2: Notice
NOTICE NOTICE Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made. IN NO EVENT SHALL CABLETRON SYSTEMS BE HELD LIABLE FOR ANY INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING, BUT... -
Page 3: Fcc Notice
NOTICE This device complies with Part 15 of FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. WARNING: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 protection against harmful interference when the equipment is operated in a... -
Page 4: Table Of Contents
2.1 Network Design Guildlines... 2-1 CHAPTER 3 INSTALLATION 3.1 Unpacking the MT-800 ... 3-1 3.2 Setting the Switches on the MT-800 ... 3-1 3.2.1 Setting the SQE Switch ... 3-1 3.2.2 Setting the Loopback Function... 3-2 3.3 Installing the MT-800 ... 3-3 3.3.1 Attaching the MT-800 to a Network ... -
Page 5: Chapter 1 Introduction
Welcome to the Cabletron Systems MT-800 Multiport Transceiver. We have designed this manual to introduce you to the MT-800 and explain how it is used with other Cabletron Systems products in creating a complete network solution. 1.1 USING THIS MANUAL You should read this manual thoroughly to gain a full understanding of the MT-800 and its capabilities. -
Page 6: An Overview Of The Mt-800
Access Unit under Ethernet Versions 1.0 and 2.0, and IEEE 802.3 standards. The MT-800 works in two modes - Local or Network. In the Local mode, the MT-800 only receives and transmits traffic from the devices attached to it. This mode is enabled by the Loopback (LBK) switch on the front of the MT-800. -
Page 7: Related User Manuals
INTRODUCTION The MT-800 also incorporates Cabletron Systems LANVIEW diagnostic and monitoring LEDs. Should a physical layer problem arise, troubleshooting of power failures, collisions, cable faults, or many other problems can be diagnosed rapidly using these LEDs. 1.4 RELATED USER MANUALS The manuals identified below should be used to supplement the procedures and other technical data provided in this manual. -
Page 8: Chapter 2 Network Requirements/ Specifications
Cabletron Systems MT-800. Review all specifications and requirements outlined in this chapter before you install the MT-800. All outlined conditions must be met to ensure satisfactory performances of your network. NOTE: Cabletron Systems reserves the right to change these specifications at any time without notice. - Page 9 AUI Cable Node Figure 2-1. MT-800 in Stand Alone Configuration b. When one MT-800 is being used in the network mode (Fig. 2-2), the total AUI length, as measured from the network transceiver to the end device, must not exceed 40 meters.
- Page 10 Primary MT-800 AUI Segments Secondary Layer of MT-800 AUI Segments Figure 2-4. MT-800 in Network Cascaded Configuration • The MT-800 device can be cascaded up to 2 units deep. • One MT-800 can support up to 64 users. Page 2-13...
- Page 11 NETWORK REQUIREMENTS/SPECIFICATIONS 2.2 SPECIFICATIONS TRANSMIT TX-in and TX-out Ports 1-8 Parameter Frequency range: Input impedance differential: common-mode: Common-mode voltage range at TX-in: Input sensitivity: Delay time,TX-in (any) to TX-out start-up: steady-state: Waveform Symmetry TX-out: Output Voltage into 78 ohms TX-out: RECEIVE RX-in and RX-out Ports 1-8 Parameter...
- Page 12 NETWORK REQUIREMENTS/SPECIFICATIONS RECEIVE (cont.) RX-in and RX-out Ports 1-8 Parameter Common-mode voltage range at TX-in: Input sensitivity: Delay time, RX-in to RX-out start-up: steady-state: Waveform Symmetry RX-out (any): Output Voltage into 78 ohms RX-out (any): COLLISION DETECTOR Parameter Output frequency: Turn-on delay.
- Page 13 NOTES: 1) The MT-800 will generate SQE (10 MHz) at Ports 1-8 if either the CP-in pair is active or if more than one of the TX-in pairs (Port 1-8) are active. 2)The MT-800 will generate a JAM signal (5 MHz) on the TX-out pair whenever more than one of the TX-in pairs (Port 1-8) is active.
- Page 14 Receive + Power Return Logic Ref. INDICATORS NOTE: The MT-800 has PWR, RCV and CLN LEDs for both the Local and Network modes. Indicates that the MT-800 is receiving power (green LED). Indicates that the MT-800 is receiving a data packet (orange LED).
- Page 15 Overload Protection: ENVIRONMENTAL NOTE: It is the responsibility of the person who sells the system of which the MT-800 will be a part of to ensure that the total system meets the allowed limits of conducted and radiated emissions. Operating temperature:...
- Page 16 NETWORK REQUIREMENTS/SPECIFICATIONS Isolation: SERVICE MTBF: 743,373 hrs. projected MTTR: <.5 hr. PHYSICAL Dimensions: Weight: Unit: Shipping: 4 lbs. 500 Vac 47-63 Hz Applied between any of the input ports shields and safety earth ground. 3.2 H x 15.0 W x 12.4 D inches 8.13 x 38.1 x 31.5 cm) 3 lbs.
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Page 17: Chapter 3 Installation
The SQE Test switch (Figure 3-1) allows you to enable or disable the SQE or “heartbeat” test function. The SQE switch is the two position switch on the front of the MT-800. The MT-800 is shipped with the SQE disabled. -
Page 18: Setting The Loopback Function
If the MT-800 will be used in the stand alone mode, the LBK function must be enabled. The MT-800 is shipped with the loopback function disabled. -
Page 19: Installing The Mt-800
ENABLE Figure 3-2. Loopback (LBK) Switch 3.3 INSTALLING THE MT-800 The MT-800 can be installed for use as a stand alone unit or attached to a network. NOTE: A location should be selected before installation procedures begin. The device must be within reach of the AUI cables that will be attached to it. -
Page 20: Connecting Devices To The Mt-800
Connect nodes or another multiport transceiver to your MT-800 as follows: NOTE: If the MT-800 will be used in the stand alone mode, be sure the loopback function is enabled. 1. Connect an AUI cable to a male port (Ports 1-8) on the back of the MT-800. - Page 21 If the LEDs still fail to light, contact Cabletron Systems Technical Support. 6. Strain relief the cables attached to the MT-800. Your MT-800 is now ready for operation. It is recommended that the system be tested prior to transmitting data, using the steps outlined in Chapter 4, Testing and LANVIEW.
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Page 22: Chapter 4 Testing And Lanview
Instructions are provided for using Cabletron Systems LANVIEW to troubleshoot network problems on the physical layer. 4.1 INSTALLATION CHECKOUT This section contains procedures to test the MT-800 after it has been installed onto your network to ensure that the physical layer of the network is operating properly. - Page 23 LAN-Specialist. 4. Repeat these steps for each port, 1-8. 5. If the MT-800 will be connected to a network, use the following checkout procedures: a. Using an AUI cable, attach the other LAN-Specialist to a properly functioning transceiver elsewhere on the network.
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Page 24: Using Lanview
If this LED is not lit, the problem may be with the input power or the MT-800. Receive (RCV) LED This orange LED normally flashes on and off to indicate the MT-800 is receiving a data packet from: • node attached to the MT-800, if the loopback mode is enabled •... - Page 25 Collision Present (CLN) LED This red LED flashes to indicate a collision has been detected. If the MT-800 is in the network mode, collisions are detected on the network or the AUI segments attached to the MT-800. If the MT-800 is in the loopback mode, collisions are only detected on the segments attached to Ports 1-8.