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Cabletron Systems MicroMMAC-22T User Manual

Enterasys micrommac-22t hubs: user guide
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MicroMMAC-22T/24T/42T/44T
USER'S GUIDE

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Summary of Contents for Cabletron Systems MicroMMAC-22T

  • Page 1 BOOKTITLE2 OPTIONAL MicroMMAC-22T/24T/42T/44T USER’S GUIDE...

  • Page 3: Fcc 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. The hardware, firmware, or software described in this manual is subject to change without notice. IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR...
  • Page 4 NOTICE DOC NOTICE This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique édicté...
  • Page 5 CABLETRON SOFTWARE PROGRAM LICENSE LICENSE. You have the right to use only the one (1) copy of the Program provided in this package subject to the terms and conditions of this License Agreement. You may not copy, reproduce or transmit any part of the Program except as permitted by the Copyright Act of the United States or as authorized in writing by Cabletron.

  • Page 6: Declaration Of Conformity

    NOTICE DECLARATION OF CONFORMITY Application of Council Directive(s): Manufacturer’s Name: Manufacturer’s Address: European Representative Name: European Representative Address: Conformance to Directive(s)/Product Standards: Equipment Type/Environment: We the undersigned, hereby declare, under our sole responsibility, that the equipment packaged with this notice conforms to the above directives. Manufacturer Mr.

  • Page 7: Table Of Contents

    PREFACE CHAPTER 1 INTRODUCTION MicroMMAC-T Models... 1-1 MicroMMAC-T Features ... 1-2 1.2.1 Lobe Port Features ... 1-2 1.2.2 Management Capabilities ... 1-2 1.2.3 Firmware Downloads To Flash EEPROM... 1-3 1.2.4 Monitoring And Diagnostic Indicators ... 1-4 1.2.5 Ring Poll Failure Recovery ... 1-4 1.2.6 Beaconing Protection/Recovery ...
  • Page 8 4.4.3 Installing A TPIM ...4-12 4.4.4 Connecting Twisted Pair Trunk Cable Segments...4-13 4.4.5 Connecting Fiber Optic Trunk Cable Segments...4-15 Connecting STH Stackable Hubs ...4-17 CHAPTER 5 MONITORING AND TROUBLESHOOTING Using LANVIEW LEDs ...5-1 Using The LCD System ...5-2 5.2.1 Viewing Static System Messages ...5-2 5.2.2...
  • Page 9 APPENDIX A SYSTEM SPECIFICATIONS Operating Specifications...A-1 Power Supply Specifications ...A-1 Environmental Specifications ...A-2 Physical Specifications ...A-2 Safety ...A-2 EMC Requirements ...A-2 APPENDIX B TPIM SPECIFICATIONS TPIM-T1/T2/T4 Pinouts ...B-1 TPIM-F2/F3 Specifications ...B-2 APPENDIX C MEDIA SPECIFICATIONS Twisted Pair Copper Cable...C-1 C.1.1 UTP ...C-1 C.1.2 STP ...C-2 Fiber Optic Cable...C-3 C.2.1 Multimode...C-4...
  • Page 10 CONTENTS viii...
  • Page 11 Figure 1-1 The MicroMMAC-T ......1-1 Figure 2-1 MicroMMAC-T Operational Components ... 2-2 Figure 2-2 Connecting To A Power Source.
  • Page 12 FIGURES Figure 4-10 Connecting To The TPIM-T2 ....4-14 Figure 4-11 Connecting To The TPIM-F2/-F3 ....4-16 Figure 4-12 MicroMMAC-T/STH Stack Configuration .
  • Page 13 Table 4-1 Maximum Lobe Cable Lengths ....4-5 Table 4-2 Maximum Trunk Cable Lengths ....4-5 Table 4-3 Connector Pinout Cross-Reference .
  • Page 14 TABLES...

  • Page 15: Document Conventions

    Welcome to the Cabletron Systems MicroMMAC-22T/24T/42T/44T User’s Guide. This guide describes how to install, configure, and operate the MicroMMAC-T family of intelligent, stackable Token Ring wiring hubs. This guide is intended for all users of the MicroMMAC-T, who should have a basic understanding of the IEEE 802.5 standard for Token Ring networks, especially of physical components used in Token Ring networks.

  • Page 16: Using This Manual

    PREFACE USING THIS MANUAL This manual’s contents is organized as follows: Chapter 1, Introduction, describes MicroMMAC-T model types and features. Chapter 2, Operation, describes how to connect the MicroMMAC-T to a power source, how to work with operational components, and the functions of MicroMMAC-T ports.

  • Page 17: Related Documentation

    RELATED DOCUMENTATION This section lists installation and operation manuals included with the MicroMMAC-T and STH hubs and accessories typically used with the MicroMMAC-T. Refer to documentation listed for the device you are working with for specific information about installing, operating, or managing the device.

  • Page 18: Getting Help

    PREFACE GETTING HELP If you need technical assistance with your MicroMMAC-T or have any questions, comments, or suggestions concerning this manual, contact Cabletron Systems Technical Support using any of the following methods: Phone CompuServe Internet mail Login Password Modem setting For additional information about Cabletron Systems products and services, visit our World Wide Web site: http://www.cabletron.com/ Before calling Cabletron Systems Technical Support, have the following...

  • Page 19: Chapter 1 Introduction

    All MicroMMAC-Ts are functionally and physically identical except for the number and type of their lobe, or Trunk Connection Unit (TCU), ports. MicroMMAC-T models are listed as follows: MicroMMAC-22T – 12 active RJ45 lobe ports that support category • 3, 4, and 5 UTP cabling MicroMMAC-24T –...

  • Page 20: Micrommac-T Features

    INTRODUCTION 1.2 MicroMMAC-T FEATURES This section provides an overview of MicroMMAC-T features. 1.2.1 Lobe Port Features This section overviews lobe port features. Repeater Circuitry Repeater circuitry in the MicroMMAC-T enables lobe ports to regenerate, reshape, and filter the incoming signal, permitting UTP lobe cable lengths of up to 120 meters and STP lobe cable lengths up to 150 meters for a 16 Mbps network.

  • Page 21: Firmware Downloads To Flash Eeprom

    The chief benefit provided by out-of-band access capability is that it allows you to manage your network in the event that the in-band network communication infrastructure that supports remote communication with the MicroMMAC-T becomes inoperable. You can also access LM from an in-band Telnet connection from any TCP/IP-based node linked to the MicroMMAC-T.

  • Page 22: Monitoring And Diagnostic Indicators

    INTRODUCTION The MicroMMAC-T automatically transmits BootP requests for NOTE an operating image if the image in Flash is invalid or damaged. 1.2.4 Monitoring And Diagnostic Indicators Cabletron Systems front-panel LANVIEW LED (Light Emitting Diode) system conveys information about the operational status of the MicroMMAC-T and the network.

  • Page 23: Beaconing Protection/Recovery

    INTRODUCTION If the offending station cannot be definitively removed from the ring by the recovery process (that is, if the offending station repeatedly attempts to re-insert before the recovery process has concluded), a trap notifies the NMS that the condition was not corrected and also identifies the last station to correctly participate in the ring poll process.

  • Page 24: Distributed Monitoring Capabilities

    INTRODUCTION 1.2.7 Distributed Monitoring Capabilities The MicroMMAC-T includes all ten RMON groups for Token Ring and Distributed LAN Monitor (DLM) software. These resources enable you to configure the MicroMMAC-T to perform various management functions, get more precise information about the operational status of your network, and reduce network traffic.
  • Page 25 • Capture Component Filter Group – Compares packets on ring to criteria specified in a filter expression to determine whether packets need to be captured for analysis. Packet Capture Group – Performs the capture of packets meeting criteria specified by the Filter Group. To implement RMON functions provided by the Capture NOTE component (Filter and Packet Capture groups), you must...

  • Page 26: Ups Monitoring Capability

    INTRODUCTION 1.2.8 UPS Monitoring Capability You can configure either of the MicroMMAC-T’s front-panel COM ports to support connection to an American Power Conversion (APC) Uninterruptible Power Supply (UPS). See the MicroMMAC-T Local Management Guide for instructions. This connection enables remote management applications to monitor UPS operational statistics compiled in the UPS MIB.

  • Page 27: Management Information Base (Mib) Groups

    Port Daughterboard – Port Density Upgrade You can increase the lobe-port count from 12 to 24 for the MicroMMAC-22T UTP lobe-port model and the MicroMMAC-42T STP lobe-port model by installing the 12-port daughterboard designed for each model. The daughterboard installs in the MicroMMAC-T front-panel aperture.
  • Page 28 INTRODUCTION 1-10...

  • Page 29: Chapter 2 Operation

    This chapter describes MicroMMAC-T control, monitoring, and connection components shown in Specifically, it covers the following areas: Connecting to a power source – turning the hub ON and OFF • Working with console switches and buttons • Setting the ring speed Resetting the hub Clearing Non-Volatile Random Access Memory (NVRAM) Working with indicators...

  • Page 30: Figure 2-1 Micrommac-T Operational Components

    OPERATION LCD panel TOKEN RING HUB MicroMMAC-24T WITH SUPPORTING 100 OHM UTP CABLE CABLETRON MicroMMAC-24T 16Mb/s MGMT RESET DISPLAY SPEED COM 2 COM 1 System LEDs COM Ports RESET Switch LCD Display Button Ring Speed Switch MicroMMAC-24T TOKEN RING HUB LANVIEW®...

  • Page 31: Turning The Hub On And Off

    2.1 TURNING THE HUB ON AND OFF You turn on the MicroMMAC-T by connecting it to a power source, and you turn it off by disconnecting it from the power source. The MicroMMAC-T’s universal power supply permits use of power sources from 100 Vac to 250 Vac, 50/60Hz.

  • Page 32: Control Switches And Buttons

    OPERATION 2.2 CONTROL SWITCHES AND BUTTONS This section describes how to use MicroMMAC-T switches and buttons to perform various hub-configuration and monitoring operations. 2.2.1 Setting The Ring Speed Use the SPEED, or ring speed switch, shown in operating speed to either 4 or 16 megabits per second (4 or 16 Mbps). The factory-set default ring speed is 16 Mbps.

  • Page 33: Resetting The Micrommac-T

    2.2.2 Resetting The MicroMMAC-T Use the RESET switch, shown in MicroMMAC-T when, for example, you want to implement a ring speed change or revert to default operational settings after toggling the NVRAM switch. MicroMMAC-24T CABLETRON MicroMMAC-24T RESET DISPLAY SPEED To reset the MicroMMAC-T: Insert a non-conductive pointed-tip instrument into the recessed RESET switch hole.

  • Page 34: Clearing Nvram

    OPERATION 2.2.3 Clearing NVRAM NVRAM (Non-Volatile Random Access Memory) stores system parameters specified in management applications, including the IP address, community passwords, ring security list, beacon recovery settings, and stack and port configuration settings. Use the NVRAM switch, shown in Figure clear NVRAM only when you want to revert to default system settings.

  • Page 35: Indicators

    Flip the NVRAM switch from its current position with a non-conductive instrument inserted through the right-most lower circulation vent on the right side panel. Reset the MicroMMAC-T as described in 2.3 INDICATORS This section describes MicroMMAC-T indicators: LANVIEW LEDs • LCD system.

  • Page 36: Describing The Lcd System

    OPERATION Except for the 16Mb/s, or ring speed, LED, which lights yellow when the ring speed is set for 16 Mbps and does not light when the ring speed is set for 4 Mbps, all LEDs are capable of emitting multiple colors. For example, the MGMT LED lights green when the management agent in the MicroMMAC-T is active and lights red when it is not active.

  • Page 37: Figure 2-7 Lcd Panel And Display Button

    • To display messages that provide information about the MicroMMAC-T firmware image and the server from which the image was downloaded, press the DISPLAY button two second to display the first message. Press and immediately release to view each additional message.

  • Page 38: Ports

    OPERATION 2.4 PORTS This section describes MicroMMAC-T ports and their functions. 2.4.1 COM Ports The MicroMMAC-T’s two RJ45 COM ports shown in RS-232C serial communication with other DTE (data terminal equipment) devices. This following sections describe applications supported by the COM ports.

  • Page 39: Lobe Ports

    Token Ring stations connect to lobe ports to insert into the Token Ring. Lobe ports can also be converted through management to Ring Out ports to support connection to passive MSAUs. The MicroMMAC-22T/24T models support UTP lobe cable connection. The MicroMMAC-42T/44T models support STP lobe cable connection and provide a grounded connection for the cabling shield.

  • Page 40: Ring In/Ring Out Ports

    Ring or multiple Token Rings from the MicroMMAC-T and STH hub assemblage. STACK2 2-12 Figure 2-11 Ring Ports Section 4.4 Figure for instructions on how to connect STH hubs to the STACK3 STACK4 Figure 2-12 STH STACK Ports for a description of 2-12, support connection to STACK5...

  • Page 41: Chapter 3 Installation

    This chapter describes how to install the MicroMMAC-T and accessories (12-port daughterboard, MicroSNAC-T, CRBRIM-W/T, LDRAM SIMM) in the MicroMMAC-T. 3.1 INSTALLING THE MicroMMAC-T This section describes installation requirements and procedures for installing the MicroMMAC-T in a rack and a free-standing site. It also describes how to install the strain-relief bar, which is used to help protect cable connections to MicroMMAC-T ports.

  • Page 42: Attaching The Strain-Relief Bar

    INSTALLATION 3.1.2 Attaching The Strain-Relief Bar The strain-relief bar absorbs the brunt of strain exerted on cabling that might otherwise be exerted directly on connector/port interfaces, as shown in Figure 3-1. To protect your network equipment, install the strain-relief bar, especially if network cabling will be hanging unsecured from the MicroMMAC-T.

  • Page 43: Installing The Micrommac-T In A Rack

    Figure 3-2 Attaching The Strain-Relief Bar 3.1.3 Installing The MicroMMAC-T In A Rack Section 3.2 NOTE accessories before you install the MicroMMAC-T in a rack. To install the MicroMMAC-T: Remove the two 3/8-inch flathead cover screws from the front side edges of the MicroMMAC-T as shown in Figure 3-3 Remove Front Side Screws Align the holes on the rack-mount brackets (position as desired) with...

  • Page 44: Free-Standing Installation

    INSTALLATION Position the MicroMMAC-T between the rack columns, and then attach with the mounting screws included with the rack as shown in Figure 3-5. Figure 3-5 Installing The MicroMMAC-T In A Rack 3.1.4 Free-Standing Installation For an enclosed-shelf or table-top installation, put the hub in dry, well-ventilated, unrestricted site at least 21 inches wide, 18 inches deep, and 6 inches high, as shown in from the power source does not exceed the length of the power cord.

  • Page 45: Installing Accessories

    3.2 INSTALLING ACCESSORIES Disconnect the MicroMMAC-T from its power source before removing the chassis cover to prevent potential electric shock hazard. This section describes how to remove the MicroMMAC-T chassis cover and install the following accessories in the MicroMMAC-T: 12-port daughterboard •...

  • Page 46: Removing Protection Panels

    INSTALLATION Slide the cover straight back from the front panel, and then lift and remove as shown in Figure 3-8 Removing The Chassis Cover 3.2.2 Removing Protection Panels To protect the MicroMMAC-T from potential damage, keep protection panels secured over empty apertures. CAUTION This section describes how to remove the protection panels covering the MicroMMAC-T’s front-panel aperture and the rear-panel aperture.

  • Page 47: Figure 3-9 Removing The Front Panel

    Figure 3-9 Removing The Front Panel INSTALLATION Protection Panel Front-Panel Aperture Support Post...

  • Page 48: Connectors And Ports On The Motherboard

    INSTALLATION Removing the Rear Protection Panel To remove the rear protection panel: Remove the MicroMMAC-T chassis cover as described in Section 3.2.1. Remove the screws securing the rear protection panel to the MicroMMAC-T rear panel, and then remove the protection panel from the aperture as shown in Keep the protection panel handy for future reattachment.

  • Page 49: Installing The 12-Port Daughterboard

    12-port daughterboard. A UTP daughterboard is included with the upgrade kit, TR-UTP-UGKIT, required for the MicroMMAC-22T. An STP daughterboard is included with the upgrade kit, TR-STP-UGKIT, required for the MicroMMAC-42T. Do not attempt to mix UTP and STP lobe port daughterboards in the same hub.

  • Page 50: Figure 3-12 Installing The 12-Port Daughterboard

    INSTALLATION Lower the daughterboard on to the support posts as shown in Figure 3-12, aligning the front of the 12-port daughterboard flush against the aperture and inserting the daughterboard connector pins completely into the connector. The pins should insert easily into the connector. You should feel only minimal resistance while inserting.

  • Page 51: Installing The Microsnac-T

    3.2.5 Installing The MicroSNAC-T The MicroSNAC-T is a SNA/WAN Network Access Converter that you can install in the MicroMMAC-T to integrate SNA and LAN data. The MicroSNAC-T includes its own operating code and COM-port-accessible management tools. The MicroSNAC-T installs above the factory-installed 12-port daughterboard for the MicroMMAC-22/42T models.

  • Page 52: Installing The Crbrim-W/T

    INSTALLATION Connector Pins (underneath) Figure 3-13 Installing The MicroSNAC-T Daughterboard 3.2.6 Installing The CRBRIM-W/T The CRBRIM-W/T bridge/router module provides WAN connectivity to remote networks. To install the CRBRIM-W/T: Remove the MicroMMAC-T chassis cover as described in Section 3.2.1 and the rear protection panel as described in Section 3.2.2.

  • Page 53: Installing The Ldram Simm

    If you feel excessive resistance while inserting – STOP. Realign the pins to the connector and retry inserting. Contact Cabletron Technical Support for assistance if you cannot make the CAUTION connection. CRBRIM-W/T LAN-Traffic Port Connector Pins (underneath) CRBRIM-W/T LAN-Traffic Port Figure 3-14 Installing The CRBRIM-W/T Connect the LAN-traffic ports using the cable included with the CRBRIM-W/T.

  • Page 54: Figure 3-15 Removing The Ldram Simm

    INSTALLATION Push the retraction handles out. Retraction Handle Lift the SIMM from the connector. Figure 3-15 Removing The LDRAM SIMM Install the 8 MB SIMM as shown in Lower the SIMM into the connector, positioning the notch on the SIMM on the rib in the connector. Push the SIMM back against the retraction handles to snap into place, aligning the holes...

  • Page 55: Chapter 4 Cabling

    4.1.1 Describing Trunk Cabling Trunk cabling is used to connect network hubs, integrating stations connected to those hubs into a common Token Ring. It supports both the main and secondary (or backup) ring paths. STP, UTP, and fiber optic media are used for trunk cabling. Performance capability varies among the media types.

  • Page 56: Describing Lobe Cabling

    CABLING 4.1.2 Describing Lobe Cabling Lobe cabling is used to connect stations to lobe (or TCU) ports on wiring concentrators to connect stations to the ring. MicroMMAC-T models support both UTP and STP lobe cabling. A station can transmit data to and receive data from other stations on the ring via the lobe cable attachment to the hub only when the lobe port on the hub to which it is attached is “enabled.”...

  • Page 57: Signal Interference

    4.2.1 Signal Interference This section describes some of the conditions that can degrade Token Ring signals and related corrective measures. Crosstalk Crosstalk is interference caused by signal coupling between different cable pairs contained within a multi-pair cable bundle. Multi-pair cabling jackets should not be used for routing Token Ring trunk cabling, especially at 16 Mbps.

  • Page 58: Determining The Maximum Signal-Drive Distance

    CABLING 4.2.3 Determining The Maximum Signal-Drive Distance One of the most important physical-design factors to consider when establishing a Token Ring network is the maximum signal-drive distance accommodated by the different media types that can be used for the installation. Basically, the drive-distance threshold for any of the specific categories of cable types (STP, UTP, fiber) used is the maximum distance a signal can travel intact across the cable between active devices without loss of data.

  • Page 59: Table 4-1 Maximum Lobe Cable Lengths

    Table 4-1 Maximum Lobe Cable Lengths Cable Type STP (IBM Types 1 & 2) STP (IBM Types 6 & 9) For station to wall jack or patch panels only UTP (Category 3 & 4) UTP (Category 5) Table 4-2 lists the maximum recommended lengths allowed for UTP, STP, and multimode fiber optic trunk cable supporting 4 Mbps and 16 Mbps data-transmission rates.

  • Page 60: Connecting Lobe Port Cabling

    4-1. UTP to STP Impedance Matching To connect a UTP lobe segment from the MicroMMAC-22T/24T to a station that supports STP cabling, but does not have an internal media filter, you must attach a media filter adapter to the STP port on the station.

  • Page 61: Figure 4-2 Utp Lobe Cabling Example

    The Cabletron Systems TRMF and TRMF-2 media filters are NOTE available for UTP-to-STP impedance matching. The Cabletron Systems T2015 and T3015 DNI cards are equipped with ports supporting both UTP and STP lobe links. Token Ring Station TRMF STP-to-UTP Media Filter Token Ring Network Interface Card OFFICE...

  • Page 62: Figure 4-3 Stp Lobe Cabling Example

    CABLING MicroMMAC-42T/44T to an existing patch panel equipped with IBM data connectors. Figure 4-3 configuration demonstrating how the adapter is used. Token Ring Station Token Ring Network Interface Card OFFICE Figure 4-3 STP Lobe Cabling Example Connector Pinouts Table 4-3 lists provides a cross-reference of pinouts for cable connectors which may be used for lobe segments.

  • Page 63: Figure 4-4 Connecting To A Lobe Port

    Connection Procedure To attach a lobe cable segment to a MicroMMAC-T lobe port, insert the RJ45 connector on the cable into an RJ45 lobe port on the MicroMMAC-T, as shown in The associated Port Status LED lights: Green when the port is enabled and the station is inserted into the ring. •...

  • Page 64: Connecting Trunk Cabling

    CABLING 4.4 CONNECTING TRUNK CABLING This section describes how to configure and install TPIMs to construct the RI/RO ports for the MicroMMAC-T and also how to connect trunk cable to the ports. 4.4.1 Describing TPIMs TPIMs, shown in Figure to power down the MicroMMAC-T to install or remove TPIMs) port interface modules designed for installation into the MicroMMAC-T’s RI/RO receptacles.

  • Page 65: Configuring Tpims For Ri/Ro Application

    4.4.2 Configuring TPIMs For RI/RO Application TPIMs are shipped configured for RI/RO application. (They can also be configured for Station-port application for other Cabletron devices.) Before installing a TPIM in a RI/RO receptacle to build a ring port for attachment to a Cabletron Systems device, ensure that its switch settings match those shown in For attachment to a non-Cabletron Systems device (for example, an IBM 8228 MSAU) you must set the phantom switch to 0 on the...

  • Page 66: Installing A Tpim

    CABLING 4.4.3 Installing A TPIM To install a TPIM into a RI/RO receptacle: Remove the plastic cover from the receptacle. Keep the cover handy for future reattachment. Slide the TPIM into the receptacle slot, as indicated in the connector pins in the slot are fully inserted into the connector on the TPIM.

  • Page 67: Connecting Twisted Pair Trunk Cable Segments

    4.4.4 Connecting Twisted Pair Trunk Cable Segments This section describes how to connect twisted pair trunk cable segments to MicroMMAC-T RI/RO ports. It also describes how to check the status of the connection using the LNK LED. Connecting STP Use the TPIM-T1 to connect an STP trunk cable segment with a DB9 connector as shown in trunk cable segment with an RJ45 connector as shown in Figure 4-8 Connecting To The TPIM-T1...

  • Page 68: Figure 4-10 Connecting To The Tpim-T2

    If the LNK LED on the TPIM-T1/T2/T4 lights red or does not light, perform the following steps to resolve the problem: Ensure that both hubs are powered up and that the ring ports on both hubs are enabled and set for the same ring speed.

  • Page 69: Connecting Fiber Optic Trunk Cable Segments

    4.4.5 Connecting Fiber Optic Trunk Cable Segments Use the TPIM-F2/ F3 to connect Fiber Optic trunk cable segments. When connecting a fiber optic link segment to the TPIM-F2 or TPIM-F3 consider the following: Ensure that the alignment key on the ST (stab and twist) connector on •...

  • Page 70: Figure 4-11 Connecting To The Tpim-F2/-F3

    If the LNK LED on the TPIM-F2/F3 does not light green, perform the following steps to resolve the problem: Ensure that both hubs are powered up and that the ring ports on both hubs are enabled and set for the same ring speed.

  • Page 71: Connecting Sth Stackable Hubs

    4.5 CONNECTING STH STACKABLE HUBS This section describes how to connect the Cabletron Systems STH HubSTACK series of active, non-intelligent, stackable hubs to the MicroMMAC-T. You can connect up to four STH hubs to the MicroMMAC-T, as shown in STH-24 TOKEN RING HUB LANVIEW®...
  • Page 72 The STH’s STACK LED lights: Green if you have correctly connected the MicroMMAC-T and • STH hub and both hubs are set to operate at the same ring speed. This indicates that the MicroMMAC-T and STH hub are on the same ring.

  • Page 73: Chapter 5 Monitoring And Troubleshooting

    MONITORING AND TROUBLESHOOTING This chapter describes how to use LANVIEW LEDs, the LCD system, and the Power Up Diagnostic screen to monitor MicroMMAC-T and network performance. It also includes a troubleshooting checklist. 5.1 USING LANVIEW LEDS LANVIEW LEDs are part of the overall diagnostic and status monitoring system for the MicroMMAC-T.

  • Page 74: Using The Lcd System

    MONITORING AND TROUBLESHOOTING 5.2 USING THE LCD SYSTEM The LCD panel displays information about the MicroMMAC-T and its operational activities and events and conditions occurring on the Token Ring managed by the MicroMMAC-T. That information is grouped into the following categories: •...

  • Page 75: Viewing Saved Alarm Messages

    5.2.2 Viewing Saved Alarm Messages Saved Alarm Messages listed in that occur on the ring. The LCD panel displays messages about the events and conditions as they occur. The MicroMMAC-T stores the messages produced since the last MicroMMAC-T reset for future retrieval. To view Saved Alarm messages: Press the DISPLAY button for five seconds and then release to display the first Saved Alarm message in the message queue.
  • Page 76 MONITORING AND TROUBLESHOOTING Table 5-3 Alarm Messages (Continued) Message uMMAC-T Port xx Removed Stack x Port xx Removed Ring Port xx wrapped Eagle Reinserting Fault Recovery Oscillation Ring Port xx Unwrapped Speed Fault uMMAC-T Port xx Speed Fault Stack x Port xx Ring Threshold: Ring Purges Ring Threshold:...
  • Page 77 Table 5-3 Alarm Messages (Continued) Message Stn Threshold: Line Errors Stn Threshold: Internal Errors Stn Threshold: Burst Errors Stn Threshold: AC Errors Stn Threshold: Rcvr Congestion Ring Poll Fail Detected Ring Poll Fail Cleared Ring Poll Fail Corrected Ring Poll Fail Not Corrected MONITORING AND TROUBLESHOOTING What It Means...

  • Page 78: Viewing Unsaved Initialization Messages

    MONITORING AND TROUBLESHOOTING 5.2.3 Viewing Unsaved Initialization Messages An Unsaved initialization message appears on the LCD as the event that produces it occurs, but it is not saved for future retrieval. normal unsaved initialization messages. error messages. If a failure or error message appears, indicating that the MicroMMAC-T has malfunctioned, call Cabletron Systems Technical Support for assistance.

  • Page 79: Viewing Saved System Messages

    5.2.4 Viewing Saved System Messages Saved System Messages listed in servers from which image files were downloaded and the image files. To view Saved System Messages: Enter the Saved Alarm Messages queue as described in Press the DISPLAY button for two seconds and then release to display the first Saved System message.

  • Page 80: Monitoring The Initialization Process

    MONITORING AND TROUBLESHOOTING 5.3 MONITORING THE INITIALIZATION PROCESS You can use any of the following methods to monitor the initialization process that occurs when the MicroMMAC-T is powered up or reset: Power Up Diagnostic screen • LED cycle • LCD messages •...
  • Page 81 In the event of a system error, the test screen provides you with the following response options: continue retry loop To execute a response option: Type the option ( Press Enter. The selected operation begins. If a single retry of the initialization test produces another error NOTE message, call Cabletron Systems Technical Support for assistance.

  • Page 82: Leds And The Lcd Panel

    MONITORING AND TROUBLESHOOTING Exiting The Screen To exit the POWER UP DIAGNOSTIC Management password screen, press the Enter key. 5.3.2 LEDs And The LCD Panel Table 5-7 lists the information conveyed by the LED system and the LCD panel during initialization phases for a MicroMMAC-T set to operate at 16 Mbps.

  • Page 83: General Troubleshooting Checklist

    5.4 GENERAL TROUBLESHOOTING CHECKLIST This section provides a checklist of troubleshooting procedures to help you resolve the most typically encountered problems that can occur with a Token Ring network installation. To check the MicroMMAC-T installation: Trace the ring path through the network to be sure that there are no breaks in the ring and that it is free from physical design errors.
  • Page 84 MONITORING AND TROUBLESHOOTING 5-12...

  • Page 85: Operating Specifications

    SYSTEM SPECIFICATIONS Cabletron Systems reserves the right to change specifications at any time without notice. A.1 OPERATING SPECIFICATIONS Data Buffer Memory (RAM): Internal Processor: Controller: Static RAM: EEPROM: FLASH memory: CPU Memory: Shared Memory: Contact Cabletron Systems Technical Support as described in the Preface for information on expanding FLASH, CPU, and Shared memory.

  • Page 86: Environmental Specifications

    SYSTEM SPECIFICATIONS A.3 ENVIRONMENTAL SPECIFICATIONS Operating Temperature: Storage Temperature: Operating Humidity: A.4 PHYSICAL SPECIFICATIONS Dimensions: Weight: A.5 SAFETY This unit meets the safety requirements of UL 1950, CSA C22.2 No. 950, EN 60950, IEC950, and 73/23/EEC. A.6 EMC REQUIREMENTS This unit meets the EMC requirements of FCC Part 15, CSA C108.8, EN55022, VCCI V-3/93.01, EN50082-1, and 89/336/EEC.

  • Page 87: Appendix Btpim Specifications

    TPIM SPECIFICATIONS B.1 TPIM-T1/T2/T4 PINOUTS Figure B-1 shows TPIM-T1/T2/T4 pinouts for RI/RO applications. TPIM-T1 4 3 2 1 9 8 7 6 RING IN 1. Receive + 2. Ground 3. +5V at 250mA 4. Ground 5.Transmit - 6. Receive - 7.

  • Page 88: Tpim-F2/F3 Specifications

    TPIM SPECIFICATIONS B.2 TPIM-F2/F3 SPECIFICATIONS The TPIM-F2 supports Multimode fiber optic cabling, and the TPIM-F3 supports Single mode fiber optic cabling. TPIM-F2 The TPIM-F2 is designed to operate with 50/125 m, 62.5/125 m, and 100/140 m fiber optic cable. parameters for the TPIM-F2, and parameters for the TPIM-F2.
  • Page 89 TPIM-F3 The TPIM-F3 is designed to operate with 8.3/125 m fiber optic cable. Table B-3 lists TPIM-F3 specifications Table B-3 TPIM-F3 Specifications Parameter Transmitter Peak Wave Length Spectral Width Rise Time Fall Time Transmitter Average Power Receiver Spectral Response Receiver Sensitivity Bit Error Rate: Better than 10 Transmitter power and receive sensitivity levels, shown in Table...
  • Page 90 TPIM SPECIFICATIONS...

  • Page 91: Twisted Pair Copper Cable

    C.1.1 UTP The MicroMMAC-22T/24T lobe ports and the TPIM-T2 support UTP cable categories 3, 4, and 5, which are described as follows: Category 3 (or 10BaseT) UTP cable consists of four unshielded •...

  • Page 92: Stp

    Media Filters A media filter is required when connecting a UTP lobe segment from a MicroMMAC-22T or MicroMMAC-24T to a station supporting STP cabling. Cabletron Systems, Inc. offers the following media filters: The TRMF media filter has an embedded female RJ45 (UTP) port and •...

  • Page 93: Fiber Optic Cable

    IBM Types 6 and 9 are used primarily for lobe connections from stations to wall jacks or patch panels. Table C-2 lists STP cable performance specifications. Table C-2 STP Cable Specifications Types Frequency 4 MHz 1 & 2 16 MHz 4 MHz 6 &...

  • Page 94: Multimode

    MEDIA SPECIFICATIONS C.2.1 Multimode Table C-3 lists signal tolerance specifications for multimode Fiber Optic cable supported by the TPIM-F2. Table C-3 Signal Tolerances For Multimode Fiber Optic Cable Cable Type Multimode 50/125 Multimode 62.5/125 Multimode 100/140 Typical Signal Attenuation Rate: < 1.5 dB/km C.2.2 Single-Mode Table C-4 lists signal tolerance specifications for single-mode Fiber Optic...
  • Page 95 4-1 to 4-2 see also Lobe cabling; Trunk cabling Cabling, signal interference crosstalk 4-3 noise 4-3 temperature 4-3 INDEX Cabling, STH hubs connecting to MicroMMAC-T 4-17 to 4-18 using HubSTACK Interconnect cables 4-17 Chassis cover, removing 3-5 Clearing NVRAM 2-6 COM ports...
  • Page 96 Installation, MicroMMAC-T attaching the strain relief bar 3-2 free-standing 3-4 rack-mounting 3-3 requirements 3-1 Interconnect cable, mandatory use when connecting STH hubs to the MicroMMAC-T 4-17 LANVIEW LEDs color codes described 5-1 introduction 2-8 monitoring power up 5-10 LCD system...
  • Page 97 LEDs. see LANVIEW LEDs LNK LED (TPIM), indications 4-12, 4-14, 4-16, 5-1 Lobe cabling connecting 4-6 to 4-9 described 4-2 maximum lengths 4-5 Lobe Port Status LEDs 5-1 Lobe port, applications 2-11 Lobe ports connecting to 4-6 to 4-9 pinouts 2-11 repeater circuitry 1-2 Ring Out capability 1-2 speed fault protection 1-2...
  • Page 98 IX-4 SNMP support 1-3 Speed fault protection 1-2 SPEED switch, setting ring speed with 2-4 STACK port 2-12, 4-17 to 4-18 STH stackable hubs connecting to MicroMMAC-T 4-17 STACK LED 4-18 using HubSTACK interconnect cables with 4-17 Strain relief bar...
  • Page 99 when connecting fiber trunk-cable segments 4-16 when connecting lobe segments 4-9 when connecting STH hub 4-18 when connecting twisted-pair trunk-cable segments 4-14 Trunk cabling connecting 4-10 to 4-16 described 4-1 maximum lengths 4-5 Uninterruptible Power Supply (UPS) 1-8 Unshielded Twisted Pair (UTP) MicroMMAC-T models 1-1 specifications C-1 to C-2 see also Lobe cabling;...
  • Page 100 INDEX IX-6...

  • Page 101: Power Supply Cord

    POWER SUPPLY CORD The mains cord used with this equipment must be a 2 conductor plus ground type with minimum 0.75 mm square conductors and must incorporate a standard IEC appliance coupler on one end and a mains plug on the other end which is suitable for the use and application of the product and that is approved for use in the country of application.

This manual is also suitable for:

Micrommac-42tMicrommac-44tMicrommac-24t

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