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EMM-E6 Installation Guide

i

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
THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN
ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH
DAMAGES.



Copyright 1996 by Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005

All Rights Reserved
Printed in the United States of America

Order Number: 9031926 August 1996

SPECTRUM

,

LANVIEW

,

MMAC

, and

BRIM

are registered trademarks and

Element Manager

,

EMM-E6

,

APIM

,

CRBRIM

,

FPIM

,

EPIM

,

EPIM-A

,

EPIM-C

,

EPIM-F1

,

EPIM-F2

,

EPIM-F3

,

EPIM-T

, and

EPIM-X

are trademarks of Cabletron Systems, Inc.

All other product names mentioned in this manual may be trademarks or registered trademarks of
their respective companies.

FCC NOTICE

This device complies with Part 15 of the 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.

NOTE:

This equipment has been tested and found to comply with the limits for a Class A digital

device, pursuant to Part 15 of the 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.
Operation of this equipment in a residential area is likely to cause interference in which case the user
will be required to correct the interference at his own expense.

WARNING:

Changes or modifications made to this device which are not expressly approved by the

party responsible for compliance could void the user’s authority to operate the equipment.

Printed on

Recycled Paper

ICH1Book Page i Tuesday, August 6, 1996 3:06 PM

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Содержание Spectrum EMM-E6

Страница 1: ...EMM E6 ETHERNET BRIDGE MANAGEMENT MODULE INSTALLATION GUIDE D C B A E F ...

Страница 2: ......

Страница 3: ...f Cabletron Systems Inc All other product names mentioned in this manual may be trademarks or registered trademarks of their respective companies FCC NOTICE This device complies with Part 15 of the 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 ca...

Страница 4: ...venting radio interference in commercial and or industrial areas Consequently when used in a residential area or in an adjacent area thereto radio interference may be caused to radios and TV receivers etc Read the instructions for correct handling CABLETRON SYSTEMS INC PROGRAM LICENSE AGREEMENT IMPORTANT Before utilizing this product carefully read this License Agreement This document is an agreem...

Страница 5: ...ES IN NO EVENT SHALL CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF BUSINESS PROFITS BUSINESS INTERRUPTION LOSS OF BUSINESS INFORMATION SPECIAL INCIDENTAL CONSEQUENTIAL OR RELIANCE DAMAGES OR OTHER LOSS ARISING OUT OF THE USE OR INABILITY TO USE THIS CABLETRON PRODUCT EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAM...

Страница 6: ...73 23 EEC EN 55022 EN 50082 1 EN 60950 Equipment Type Environment Networking Equipment for use in a Commercial or Light Industrial Environment We the undersigned hereby declare that the equipment packaged with this notice conforms to the above directives Manufacturer Legal Representative in Europe Mr Richard Michaud Mr J Solari ___________________________________ __________________________________...

Страница 7: ... Connecting to the Network 3 10 3 5 1 Connecting a 10BASE T Segment to an EPIM T 3 10 3 5 2 Connecting a 10BASE F Segment to an EPIM F2 or EPIM F3 3 13 3 5 3 Connecting a 10BASE F Segment to an EPIM F1 3 15 3 5 4 Connecting an AUI Segment to an EPIM X or EPIM A 3 17 3 5 5 Connecting a 10BASE2 Segment to an EPIM C 3 18 3 6 Backplane Test 3 20 CHAPTER 4 TROUBLESHOOTING 4 1 Using LANVIEW LEDS 4 1 4 2...

Страница 8: ...pgrades B 3 B 3 1 Locating SIMMs B 3 B 3 2 Installing SIMMs B 4 APPENDIX C ETHERNET CABLING REQUIREMENTS C 1 Network Requirements C 1 C 1 1 10BASE T Twisted Pair Network C 1 C 1 2 Multimode Fiber Optic Network C 3 C 1 3 Single Mode Fiber Optic Network C 4 C 1 4 10BASE2 Coaxial Cable Network C 5 C 1 5 Transceiver Requirements C 5 INDEX ...

Страница 9: ...p eliminate any potential problems during or after installation please be sure to read and understand all of the instructions information in this document and in the release notes supplied with your EMM E6 You should have a general working knowledge of Ethernet or IEEE 802 3 type data networks prior to installing the EMM E6 The following summarizes the organization of this manual Chapter 1 Introdu...

Страница 10: ...odule related difficulties Appendix A Specifications provides the physical specifications and operating requirements of the EMM E6 This appendix also contains serial port pinout tables for constructing Local Management cables Appendix B Upgrading the EMM E6 details the procedures that must be followed when expanding the capabilities of the EMM E6 This appendix contains information on memory upgrad...

Страница 11: ...bers and are not essential to an understanding of the document References to chapters or sections within this document will be printed in boldface type References to other publications or documents will be printed in italic type NOTE Note symbol Calls the reader s attention to any item of information that may be of special importance CAUTION Caution symbol Contains information essential to avoid d...

Страница 12: ...al Support By phone 603 332 9400 Monday Friday 8 A M 8 P M Eastern Time By CompuServe GO CTRON from any prompt By Internet mail support ctron com By FTP ctron com 134 141 197 25 Login anonymous Password your email address Before calling Cabletron Systems Technical Support have the following information ready A description of the failure A description of any action s already taken to resolve the pr...

Страница 13: ...he EMM E6 2 1 THE FACEPLATE Figure 2 1 The EMM E6 Faceplate Knurled Knobs The black plastic knurled knobs on the faceplate of the EMM E6 are used to turn the securing screws that hold the EMM E6 module in place in the MMAC chassis Interface E BRIM Slot Interface F BRIM Slot EPIM Slots Serial Ports Reset Switch LANVIEW LEDs Knurled Knobs 1926n01 E F ...

Страница 14: ...cabling LANVIEW LEDs are identified in Section 2 3 LANVIEW LEDS EPIM Ethernet Port Interface Module Slot The EPIM slot is a covered opening in the EMM E6 faceplate that can be configured with an optional EPIM module Serial Ports The EMM E6 faceplate provides two serial communications ports for the connection of out of band management devices BRIM Bridge Router Interface Module Slots The BRIM slot ...

Страница 15: ...rposes during the manufacturing process The dip switches can also be used to clear the NVRAM of the EMM E6 which contains configuration and local management settings or to force the EMM E6 to request a new firmware image from a properly configured BootP server BRIM Connectors The Channel E and Channel F BRIM connectors allow the EMM E6 to connect BRIM modules to Ethernet Channels E and F of the EM...

Страница 16: ...6 Internal Components SDRAM SIMM Slot The EMM E6 motherboard provides the option of upgrading memory capacity by using Single In line Memory Modules SIMMs The EMM E6 comes with 4 Megabytes MB of Shared Dynamic Random Access Memory SDRAM built into the module The SDRAM temporarily stores the packets received be the module while forwarding filtering and error checking operations are performed LSI Lo...

Страница 17: ...onjunction with the runtime download capabilities of the EMM E6 allows the downloading of firmware to the module without requiring that the module be shut down The firmware download may be performed at any time during the operation of the module and the new firmware image will be used at the next reset of the module BRIM F Ribbon Connector The BRIM F ribbon connector provides a connection point fo...

Страница 18: ...hooting The following LEDs are on the faceplate of the EMM E6 CPU The CPU LED indicates the operating status of the EMM E6 and is primarily concerned with the operation of the onboard i960 RISC processor NOTE The STBY RCV XMT and CLN LEDs are in a matrix which provides these indicators for four of the EMM E6 Ethernet channels To read the LEDs the vertical column indicates the interface or channel ...

Страница 19: ... management operations or by the operation of the Spanning Tree Algorithm RCV The RCV LED indicates the reception of Ethernet frames by the associated port or interface XMT The XMT LED indicates the transmit status of the associated port or interface CLN The CLN LED flashes to indicate that a collision has been detected on the associated segment ...

Страница 20: ...Chapter 2 Controls and Indicators 2 8 EMM E6 Installation Guide ...

Страница 21: ... the installed EMM E6 3 1 UNPACKING THE EMM E6 Unpack the EMM E6 as follows 1 Remove the shipping material covering the EMM E6 2 Verify the contents of the packing carton The carton as shipped should contain the following items CAUTION Observe all antistatic precautions when handling sensitive electronic equipment Table 3 1 Contents of EMM E6 Carton Item Quantity EMM E6 1 Disks containing firmware...

Страница 22: ...ect the non conductive bag If there are any signs of damage contact Cabletron Systems Technical Support immediately 5 Place the static grounding strap properly upon your wrist before opening the non conductive bag 6 Open the non conductive bag by tearing the black and yellow tape seal 7 Perform a second visual inspection of the module CAUTION Do not cut the bag open as damage to the EMM E6 may res...

Страница 23: ... configuration options All switches ship in the OFF position Figure 3 1 EMM E6 Dip Switches Never adjust switch settings while the EMM E6 is on Not only is this dangerous but the change in state i e position only activates the switch function after restarting or cycling power to the board LSI Logic LSI Logic A L C O G D S O 8 S ON 1 2 3 4 5 6 7 8 1926n05 Off On ...

Страница 24: ...t will timeout in approximately one minute If the EMM E6 times out the image is loaded from its FLASH memory Switch 7 NVRAM Reset The EMM E6 uses NVRAM to store user entered parameters such as IP addresses device name etc Changing the state of this switch i e moving the switch from one position to another resets these parameters to the factory defaults NOTE Do NOT change the state of Switch 6 unle...

Страница 25: ...nt to test the module in a controlled situation to ensure that it is bridging traffic You can perform this test with two workstations see Figure 3 2 using an MMAC with an EMM E6 and Ethernet Media Interface Module MIM RMIM or XMIM installed and set up as follows 1 Install the EMM E6 into an MMAC that is not attached to a network 2 Install an Ethernet Media Interface Module MIM Repeating Media Inte...

Страница 26: ...port on the Media Interface Module that has been placed in the MMAC chassis 5 Designate the first workstation as a file server and the second one as the client refer to individual workstation manuals for instructions on assigning server client relationships 6 Send packets between the two workstations to verify the proper operation of the EMM E6 If a failure occurs contact Cabletron Systems Technic...

Страница 27: ...nd top edges of the printed circuit board with the guides Make sure that both the bottom and top edges of the printer circuit board rest in these guides 3 Slide the EMM E6 Figure 3 3 into slots 1 and 2 of the MMAC chassis Any installation operations should be performed only by qualified personnel CAUTION You may only install the EMM E6 in slots 1 and 2 farthest slots to the right of the MMAC chass...

Страница 28: ...ghtening the knurled knobs If you do not tighten the knurled knobs vibration can cause the module to lose contact with the backplane and disrupt your network 6 Reinstall the MMAC chassis safety bars 7 Power up the MMAC if it is not already ON 8 Observe the status of the LANVIEW LEDs Figure 3 4 on the EMM E6 When the CPU LED is amber the module is in boot state During this approximately one minute ...

Страница 29: ... CPU LED should be flashing green indicating proper EMM E6 operation Proceed to Section 3 5 Connecting to the Network to connect the appropriate network segments to the EMM E6 and individual EPIMs for connections to individual BRIMs refer to the appropriate BRIM Guides CPU RESET STBY RCV XMT CLN A B C D 1926n04 ...

Страница 30: ...M C Section 3 5 5 3 5 1 Connecting a 10BASE T Segment to an EPIM T Before connecting a segment to the EPIM T check each end of the segment to determine wire crossover If the wires do not cross over use the switch on the EPIM T to internally cross over the RJ45 port Refer to Figure 3 5 to properly set the EPIM T crossover switch NOTE For proper operation the EPIM T module to be configured for use i...

Страница 31: ...and check the port for obstruction Also verify that the connector and the port are of the same type Once the locking clip snaps into place the RJ45 connector will remain in the port 3 Check that the LNK indicator LED is ON If the indicator is not ON the port does not have a valid link Perform each of the following steps until you reach a resolution of the problem and achieve a link a Check that th...

Страница 32: ...rm of the locking clip towards the main body of the housing When the arm contacts the housing the locking clip has been disengaged Without releasing the arm gently pull the RJ45 connector directly out of the port If the connector will not come out there may be damage to the locking clip Examine the arm of the locking clip While pressing the arm back toward the shell of the connector verify that th...

Страница 33: ...on the applicable port on the module and from the ends of the connectors on each fiber strand 2 Attach one fiber to the applicable receive port on the module Insert the ST connector into the port with the alignment slot on the connector inserted over the locking key on the port Turn the connector clockwise to lock it down NOTE For proper operation the EPIM F2 module to be configured for use in the...

Страница 34: ...ent but not ON that port does not have a valid link Perform each of the following steps until you reach a resolution of the problem and achieve a link Check that the device at the other end of the link is ON Verify proper crossover of the fiber strands Try swapping the transmit and receive connections at only one end of the link Verify that the fiber connection meets the dB loss specifications out...

Страница 35: ...and 2 Attach one fiber to the receive port RX on the EPIM F1 Insert the SMA connector into the port Turn the connector clockwise until the connector will no longer turn easily Do not overtighten the connector NOTE For proper operation the EPIM F1 module to be configured for use in the EMM E6 module must be of EPIM board revision 05 or greater Board revision numbers are found following the part num...

Страница 36: ...s not have a valid link Perform each of the following steps until you reach a resolution of the problem and achieve a link Check that the device at the other end of the link is ON Verify proper crossover of the fiber strands Try swapping the transmit and receive connections at only one end of the link Verify that the fiber connection meets the dB loss specifications outlined in Appendix C Ethernet...

Страница 37: ...th the AUI port of the EPIM as shown in Figure 3 9 The port will only connect if it is properly aligned 2 Firmly press the AUI connector over the AUI port If there is a slide latch present for the AUI connector slide it over the locking posts on the DB15 port Figure 3 9 AUI Connector Insertion NOTE Ensure that the external transceiver to which the EPIM A connects does not have the signal quality e...

Страница 38: ...d contact pin is present and centered Any bent or broken pins may not connect properly and should be replaced 1 Set the Internal Termination TERM switch located to the right of the port and labeled TERM to one of the following positions a The ON position to internally terminate the thin coaxial cable segment at the port Thin coaxial cable segments may be directly connected to the port b The OFF po...

Страница 39: ...sure Figure 3 10 BNC Connector Insertion 4 The locking keys of the female connector will pull the connector in until they reach the circular locking holes at the end of the guide channels The keys will click the connector into place and hold it there To remove the BNC connector perform the steps above in reverse order turning the metal housing counter clockwise and pulling the connector straight o...

Страница 40: ...and client See Figure 3 11 1 After the EMM E6 is installed in the MMAC connect the client workstation to the EMM E6 EPIM 1 port 2 Connect the server workstation to another Ethernet MIM that is accessible from an Ethernet channel in the MMAC FNB hub 3 Send packets between the two workstations to verify the proper operation of the EMM E6 A ping test will send packets from one station to another If a...

Страница 41: ...four of the EMM E6 Ethernet channels To read the LEDs the vertical column indicates the interface or channel the LED designates while the horizontal row denotes the condition or statistic being monitored Table 4 1 LANVIEW LED Messages LED Color Description Error Condition Recommended Action CPU Green Flashing Normal operation If the LED is not lit the EMM E6 may not be receiving power See the Trou...

Страница 42: ...Check with your Network Administrator to find out if the EMM E6 was placed intentionally in standby mode If a Data loop does exist reconfigure the network to remove the data loop RCV Amber LED flashes to indicate that a segment is receiving a frame If none of the receive LEDs is flashing the EMM E6 is not receiving frames on any of the segments Check that each module is firmly installed in the MMA...

Страница 43: ... the network is actually producing Ethernet traffic Contact Cabletron Systems Technical Support for assistance CLN Red Collision detected on a segment When the LAN is operating properly occasional flashing is normal Excessive flashing or a solid light indicates an inordinate number of collisions Ensure that the SQE test is disabled for any transceiver connected to the EMM E6 external channels D E ...

Страница 44: ...et Check power cables for viability Check that the MMAC has adequate power Some configurations especially those including FDDI modules require that more than one power supply be installed in the MMAC Check to see that all power supply LEDs are green EMM E6 not properly installed Re install EMM E6 in hub according to instructions in Chapter 3 EMM E6 connector pin damage Examine EMM E6 backplane con...

Страница 45: ...n the same MIM are able to access The port is either off or segmented Enable the port via local or remote management Port cable is defective Try connecting the port with a different cable User Parameters IP address Device and Module Name etc are lost when device is powered down Switch 7 has been toggled and user entered parameters have been reset to factory default Reset one or more parameters and...

Страница 46: ...tails High number of collisions on EPIM port External transceiver has SQE enabled Disable SQE Ports go into standby for no apparent reason Configurations where devices connected across EMM E6 channels can cause the EMM E6 to detect a looped condition Discuss these configurations with Cabletron Technical Support before implementing them into your network Table 4 2 Troubleshooting Checklist Continue...

Страница 47: ...latile Random Access Memory NVRAM the non volatile random access memory where the EMM E6 stores network management parameters To use the reset switch use a pen or pencil to press the switch in When this is done the EMM E6 initializes itself NOTE The reset sequence for the EMM E6 may last approximately one minute The final time may change depending upon the configuration of the chassis in which the...

Страница 48: ...Chapter 4 Troubleshooting 4 8 EMM E6 Installation Guide ...

Страница 49: ...ATIONS Dimensions 29 21 H x 7 64 W x 34 07 D cm 11 5 H x 3 W x 13 4 D in Weight unit 1 25 kg 2 75 lbs Weight as shipped 1 74 kg 3 83 lbs A 2 OPERATING SPECIFICATIONS Internal Processor s Intel 80960 Ethernet Controller 4 DP83932 Controllers Shared Memory 4 MB Expandable to 12 MB Read Only Memory NVRAM 128 K FLASH Memory 2 MB Expandable to 14 MB CPU Memory Local Memory 8 MB 4 MB 4 MB SIMM Expandabl...

Страница 50: ...ted by Bellcore and found to comply with the following Bellcore standards TR NWT 000063 Network Equipment Building System NEBS Generic Equipment Requirements GR 1098 CORE EMC and Electrical Safety Generic Criteria for Network Telecommunications Equipment A 5 COM PORT PINOUT Type Standard RJ45 port Pin Function Connection Attitude 1 Transmit Data XMT From COM 2 port 2 Data Carrier Detect DCD From C...

Страница 51: ... In line Memory Modules SIMMs B 1 LOCATING BRIM CONNECTORS This section points out Bridge Router Interface Module BRIM connector locations on your EMM E6 board Refer to your BRIM Guide for specific installation procedures and additional information The following diagram Figure B 1 shows BRIM connector locations for the EMM E6 Figure B 1 BRIM Connector Locations LSI Logic LSI Logic Channel E BRIM C...

Страница 52: ...making sure the connectors on the rear of the module and inside the EMM E6 attach properly Refer to Figure B 2 3 Secure the EPIM to the EMM E6 by tightening the mounting screw Figure B 2 Installing an EPIM NOTE The EMM E6 EPIM slots are designed to provide redundancy Only one EPIM will be active at any time The inactive EPIM port will be held in standby and will be immediately activated in the eve...

Страница 53: ...rdering them contact your Cabletron Systems Sales Representative B 3 1 Locating SIMMs Each memory type has a specific SIMM slot location on the EMM E6 motherboard When installing SIMM boards make sure that you place them in their proper slots Figure B 3 illustrates the EMM E6 SIMM slot locations and the direction indicated by the white arrow in which to install the SIMMs Figure B 3 SIMM Slot Locat...

Страница 54: ...M slot location Figure B 3 refer to the procedures below 1 Insert the SIMM between the connector teeth in the SIMM slot 2 Pivot the SIMM down until it locks into the clips in the SIMM slot and the SIMM holes fit over the SIMM slot posts See Figure B 4 Figure B 4 Installing a Horizontal SIMM CAUTION Observe all antistatic precautions when handling sensitive electronic equipment SIMM Clips Connector...

Страница 55: ...E6 using an EPIM T ensure the network meets the following requirements Length The IEEE 802 3 10BASE T standard requires that 10BASE T devices transmit over a 100 meter 328 foot link using 22 24 AWG unshielded twisted pair wire However cable quality largely determines maximum link length If you use high quality low attenuation cable you can achieve link lengths of up to 200 meters Cable delay limit...

Страница 56: ...ect on the quality of the received signal Jitter Intersymbol interference and reflections can cause jitter in the bit cell timing resulting in data errors 10BASE T links must not generate more than 5 0 ns of jitter Make sure your cable meets 10BASE T link impedance requirements to rule out jitter as a concern Delay The maximum propagation delay of a 10BASE T link segment must not exceed 1000 ns Th...

Страница 57: ... 140 µm fiber optic cabling Attenuation You must test the fiber optic cable with a fiber optic attenuation test set adjusted for an 850 nm wavelength This test verifies that the signal loss in a cable falls within the following acceptable levels 13 0 dB or less for a 50 125 µm fiber cable segment 16 0 dB or less for a 62 5 125 µm fiber cable segment 19 0 dB or less for a 100 140 µm fiber cable seg...

Страница 58: ...3 however multimode cable allows for greater optical loss and limits the possible distance to 2 Km Attenuation You must test the fiber optic cable with a fiber optic attenuation test set adjusted for a 1300 nm wavelength This test verifies that the signal loss in a cable falls within the acceptable level of 10 0 dB or less for any given single mode fiber optic link Budget and Propagation Delay Whe...

Страница 59: ...e length of the cable segment for host connections Ensure that all connections are spaced 0 5 meters or more from one another or from terminators If you use an excessive number of barrel connectors within the cable segment e g finished wall plates with BNC feed throughs you may need to reduce the number of host connections For special network design information contact Cabletron Systems Technical ...

Страница 60: ...Appendix C Ethernet Cabling Requirements C 6 EMM E6 Installation Guide ...

Страница 61: ... C 3 AUI connection 3 17 B BNC connector usage 3 18 BRIM slot locating connectors B 1 location 2 2 C Cable requirements C 1 Coaxial cable see 10BASE2 COM port see Serial port Crosstalk C 2 D Dimensions A 1 Dip switches see Mode switches Document control numbers 1 3 E Environmental specifications A 2 EPIM slot adding EPIMs B 2 connector 2 4 location 2 2 F Faceplate components 2 1 Fiber optics see 1...

Страница 62: ... 5 N NVRAM reset 3 4 P Password defaults 3 5 Pinouts RJ45 3 11 Problems troubleshooting 4 4 Propagation delay C 2 C 3 R Reference formats 1 3 Reset switch 4 7 using 4 7 RJ45 pinouts 3 11 S Safety requirements A 2 SDRAM SIMM slot 2 4 SIMM slot location 2 4 Serial port location 2 2 pinout A 2 SIMMs installing B 4 location B 3 SMA connectors usage 3 15 Specifications A 1 SQE test 3 17 T T connector C...

Страница 63: ...ort has been placed in standby mode through management operations RCV A B C or D Amber Indicates that the associated port is receiving a frame XMT A B C or D Green Indicates that the associated port is transmitting frames CLN A B C or D Red Lights to indicate a collision has occurred on the corresponding Ethernet segment CPU RESET STBY RCV XMT CLN A B C D 1926n04 EMM E6 Quick Reference Card ...

Страница 64: ...slots 1 and 2 of the MMAC as shown below 4 Secure the module by tightening the knurled knobs at the top and bottom of the module 5 Replace the safety bars on the MMAC chassis 6 Power on the MMAC chassis Any installation operations must be performed only by qualified personnel NOTE We recommend powering down your MMAC when inserting or removing modules even though Cabletron Systems modules have hot...

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