Cabletron Systems MT-800 User Manual Download Page 25

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TESTING AND LANVIEW

Page 4-30

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.

The flash of the LED is pulse stretched for viewing effect.

Front matterBook Page 30 Thursday, January 25, 1996 12:06 PM

Summary of Contents for MT-800

Page 1: ...MT 800 MULTIPORT TRANSCEIVER USER S MANUAL CABLETRON SYSTEMS P O Box 5005 Rochester NH 03867 0505...

Page 2: ...INCIDENTAL INDIRECT 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...

Page 3: ...e 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 turnin...

Page 4: ...SPECIFICATIONS 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 Loop...

Page 5: ...ts Specifications lists the network design guidelines plus operating specifications and power requirements for the MT 800 Chapter 3 Installation contains the steps for unpacking the MT 800 setting its...

Page 6: ...also be configured with another transceiver to allow the devices attached to it to communicate with a larger network The other transceiver could be attached to a thick or thin coax cable a fiber optic...

Page 7: ...USER MANUALS The manuals identified below should be used to supplement the procedures and other technical data provided in this manual The procedures contained in these manuals will be referenced rat...

Page 8: ...hese specifications at any time without notice 2 1 NETWORK DESIGN GUIDELINES The following network design guidelines must be followed when connecting the MT 800 Multiport transceiver to other devices...

Page 9: ...red from the network transceiver to the end device must not exceed 40 meters Figure 2 2 MT 800 in Network Configuration c When an MT 800 in the stand alone mode is cascaded with another MT 800 Fig 2 3...

Page 10: ...ngth from the network transceiver to the end device must not exceed 30 meters 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 su...

Page 11: ...ohms Common mode voltage range at TX in 0 30 Volts 0 5 Volts Input sensitivity 100 mV 75 to 150 mV Delay time TX in any to TX out start up 50 ns 100 ns steady state 10 ns 20 ns Waveform Symmetry TX ou...

Page 12: ...n to RX out start up 50 ns 100 ns steady state 10 ns 20 ns Waveform Symmetry RX out any 0 25 ns 0 50 ns Output Voltage into 78 ohms RX out any 900 mV 550 mV COLLISION DETECTOR Parameter Typical Worst...

Page 13: ...0 1000 ns duration 800 ns 600 1000 ns 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 80...

Page 14: ...RS NOTE The MT 800 has PWR RCV and CLN LEDs for both the Local and Network modes PWR Indicates that the MT 800 is receiving power green LED RCV Indicates that the MT 800 is receiving a data packet ora...

Page 15: ...with both primary inputs Output Voltage Vdc 12 Vdc11 5 15 5 Vdc Overload Protection 1 3AG 1 Amp fuse ENVIRONMENTAL NOTE It is the responsibility of the person who sells the system of which the MT 800...

Page 16: ...solation 500 Vac 47 63 Hz Applied between any of the input ports shields and safety earth ground SERVICE MTBF 743 373 hrs projected MTTR 5 hr PHYSICAL Dimensions 3 2 H x 15 0 W x 12 4 D inches 8 13 x...

Page 17: ...shipping box in the event the MT 800 has to be reshipped Set the transceiver aside to prevent it form being damaged 3 Remove the plastic bag containing the accessories and check that it contains the f...

Page 18: ...e front of the MT 800 Figure 3 1 SQE Switch 3 2 2 Setting the Loopback Function The Loopback LBK Select switch Figure 3 2 allows the MT 800 to be configured for use in the stand alone mode or as part...

Page 19: ...ures begin The device must be within reach of the AUI cables that will be attached to it 3 3 1 Attaching the MT 800 to a Network The MT 800 is attached to a network through the Network port on the rea...

Page 20: ...Connect an AUI cable to a male port Ports 1 8 on the back of the MT 800 2 Connect the AUI cable to the other device NOTE If the device being attached to one of the male ports is another MT 800 be sur...

Page 21: ...he respective AUI cable check the connections and reattach the cable If the LEDs still fail to light contact Cabletron Systems Technical Support 6 Strain relief the cables attached to the MT 800 Your...

Page 22: ...he procedures in this section you will need If the MT 800 is being used in the network mode two Ethernet testers capable of generating valid data packets are needed such as Cabletron Systems LAN Speci...

Page 23: ...f 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 b...

Page 24: ...s being transmitted through the respective port The flash of the LED is pulse stretched for viewing effect These LEDs are only lit if an active segment is attached to that port and the device on that...

Page 25: ...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 detec...