Cabletron Systems MMAC-M8FNB User manual

MMAC-M8FNB™
MULTI-MEDIA ACCESS CENTER
OVERVIEW AND SETUP GUIDE
CABLETRON SYSTEMS, P.O. Box 5005, Rochester, N.H. 03866-5005

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 December 1995 by
Cabletron Systems, Inc.
P.O. Box 5005
Rochester, NH 03866-5005
All Rights Reserved
Printed in the United States of America
Order number: 9030535-08 December 1995
SPECTRUM , LANVIEW , and Multi Media Access Center are
registered trademarks and MMAC-M8FNB, MIM, M8PSM ,
M8PSM-E , and M8PSM-EDC are trademarks of Cabletron Systems,
Inc.
Ethernet is a trademark of Xerox Corporation.
IBM is a registered trademark of International Business Machines
Corporation

ii
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.
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
par le ministère de Communications du Canada.
BABT NOTICE
This device is approved under BABT General Approval No.
NS/G/1234/J/100003 for indirect connection to public
telecommunications systems in the United Kingdom.

iii
VCCI NOTICE
This equipment is in the 1st Class Category (information equipment
to be used in commercial and/or industrial areas) and conforms to the
standards set by the Voluntary Control Council for Interference by
Information Technology Equipment (VCCI) aimed at preventing 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.

iv

v
CONTENTS
CHAPTER 1 INTRODUCTION
1.1 USING THIS MANUAL............................................................1-1
1.1.1 Symbols..........................................................................1-2
1.2 USING THE MMAC-M8FNB MANUAL SET..........................1-2
1.3 GETTING HELP........................................................................1-3
1.4 THE MMAC-M8FNB MULTI MEDIA ACCESS CENTER.....1-4
1.5 MMAC-M8FNB FEATURES.....................................................1-5
CHAPTER 2 INSTALLATION REQUIREMENTS AND
SPECIFICATIONS
2.1 SITE GUIDELINES...................................................................2-1
2.2 MMAC-M8FNB CONFIGURATION GUIDELINES...............2-2
2.3 OPERATING SPECIFICATIONS.............................................2-3
2.3.1 Physical Specifications..................................................2-3
2.3.2 Power Supply Requirements........................................2-4
2.3.3 Test Points.....................................................................2-7
2.4 LEDs...........................................................................................2-8
2.5 SAFETY....................................................................................2-12
CHAPTER 3 MMAC-M8FNB SETUP
3.1 UNPACKING THE MMAC-M8FNB.........................................3-1
3.2 SETTING UP THE MMAC-M8FNB.........................................3-2
3.2.1 Rack Mounting the MMAC-M8FNB Chassis..............3-2
3.2.2 Rack Mounting the Cable Tie Tray..............................3-4
3.2.3 Inserting the Fan Tray .................................................3-5
3.2.4 Installing the Power Supply Module............................3-6
3.2.5 Installing the Security Bars.........................................3-9
3.2.6 Powering Up the MMAC-M8FNB..............................3-10

CONTENTS
vi

Page 1-1
CHAPTER 1
INTRODUCTION
The MMAC-M8FNB™ Multi Media Access Center offers
maximum flexibility and convenience in the design and operation of
your network.The enclosure provides space for one
Repeater/Management Module and up to seven Media Interface
Modules (MIM™), allowing up to 171 network connections depending
on the Repeater/Management module and the MIMs that have been
installed.
This manual is an installation and reference guide. It lists the
features and options of the MMAC-M8FNB and explains how to
install the fan tray and power supply(ies).You should read through
this manual prior to using the MMAC-M8FNB to gain a full
understanding of the MMAC-M8FNB and its capabilities.
1.1 USING THIS MANUAL
Chapter 1, Introduction , discusses the features and capabilities of
the MMAC-M8FNB.
Chapter 2, Installation Requirements and Specifications , lists
the location requirements that must be met before you install the
MMAC-M8FNB on your network.This chapter also includes some
MIM configuration guidelines, environmental guidelines, and
operating specifications for the MMAC-M8FNB and related Power
Supply Modules (M8PSM™, M8PSM-E™, or M8PSM-EDC™).
Only qualified personnel should install or service this
unit and its modules!

INTRODUCTION
Page 1-2
Chapter 3, MMAC-M8FNB Setup , contains instructions for rack
mounting your MMAC-M8FNB, inserting the fan tray, installing the
power supply(ies), installing the security bars, and powering up the
MMAC-M8FNB.
1.1.1 Symbols
Throughout this manual you will see two symbols which will be used
to call your attention to important safety-related information:
You will also see a third symbol, which will be used to call your
attention to additional information not related to safety:
1.2 USING THE MMAC-M8FNB MANUAL SET
Other manuals have been developed for the Repeater/Management
modules and for each MIM that can be installed in your
MMAC-M8FNB. These manuals explain how to install the individual
CAUTION: when you see this symbol, you will be
provided with special precautionary information th
at
can help you guard against improper use of your
equipment.
WARNING: when you see this symbol, note that failure
to follow the instructions provided can result in an
electrical safety hazard.
NOTE: the information that follows could help you to
better use and understand your equipment.
NOTE

INTRODUCTION
Page 1-3
modules into the MMAC-M8FNB, how to attach cable segments to the
modules, and how to test those segments after they have been
installed. Specifications for all modules are included in each manual.
Additional manuals have been developed on how to use Cabletron
Systems’ Network Management software packages; these manuals
include information about how to remotely manage the
MMAC-M8FNB and the M8PSM-E and M8PSM-EDC power supply
modules.
Each manual in this set assumes that you have a general working
knowledge of Ethernet or IEEE 802.3, 802.5, and FDDI type data
communications networks and their physical layer components.
1.3 GETTING HELP
If you need additional support related to the MMAC-M8FNB, or if you
have any questions, comments, or suggestions related to this manual,
contact Cabletron Systems Technical Support. Before calling, please
have the following information ready:
• The product type (MMAC-M8FNB), and the product serial
number.The serial number is located on the front panel of the
MMAC, and the product type is on the fan tray label.Also, be
sure to note which power supply module or modules you have
installed: the M8PSM, the M8PSM-E, and/or the
M8PSM-EDC.
You can contact Cabletron Systems’ Technical Support Department by
any of the following methods:
By phone: Monday through Friday between
8 A.M. and 8 P.M. Eastern
Standard Time at [phone].
By Mail: Cabletron Systems, Inc.
PO Box 5005
Rochester, NH 03866-5005
By CompuServe
®
: GO CTRON from any ! prompt

INTRODUCTION
Page 1-4
By Internet mail: [email protected]
By FAX: [phone]
By BBS: [phone] (4 lines available)
1.4 THE MMAC-M8FNB MULTI MEDIA ACCESS CENTER
The Cabletron Systems MMAC-M8FNB is a complete modular
approach to integrated networks.The MMAC-M8FNB supports Local
Area Networks compliant to IEEE 802.3, IEEE 802.5, and FDDI
standards. It also supports all of the Cabletron Systems Media
Interface Modules (MIMs). Figure 1-1 below illustrates an
MMAC-M8FNB equipped with a variety of MIM cards.
Figure 1-1. MMAC-M8FNB with Installed MIMs
AUI POK
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CLN CLN
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10BASE-T
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CLN CLN
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ETHERNET ETHERNET
AUI POK
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ETHERNET BC
CLN CLN
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10BASE-T
ETHERNET
B
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POWER
EFDMIM
SN
STAND
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FDDI
SYS
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RX
WRAP
TOKISD
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POK
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LINK
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16MB
TRMIM-4A
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WFLT
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TOKEN RING
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TRMIM-22A
SN
MMAC-M8FNB
The Complete Networking Solution™
Multi Media Access Center
EMME
SN
RESET
ON PWR
M
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M
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O
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BOK
STBYA
STBYB
RCVA
RCVB
RCVC
RCVD
ERR
STBYC
STBYD
CLNA
CLNB
CLNC
CLND
A
U
I
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A
U
I
2
ON PWR

INTRODUCTION
Page 1-5
A variety of IEEE 802.3, IEEE 802.5, and FDDI compliant media can
be connected to the MMAC-M8FNB, including shielded and
unshielded twisted pair, fiber optic cable, thick or thin coaxial cable,
and standard AUI transceiver cable. Each media type has a MIM
which, when installed into the MMAC-M8FNB, is compatible with all
other MIMs installed in that unit.The MMAC-M8FNB provides
complete network integration of a variety of media through a single
source.
The MMAC-M8FNB is designed so that network expansions or
changes in media types can be done without bringing down the entire
network — in a matter of minutes, you can add, change, or replace
MIMs without turning off the MMAC-M8FNB or using any special
tools.This design also allows the MMAC-M8FNB to continue to adapt
to ever-changing industry standards.
1.5 MMAC-M8FNB FEATURES
Three Power Supply Modules to Choose From
The MMAC-M8FNB chassis supports three different power supply
modules: the original M8PSM, the M8PSM-E enhanced model, and
the new M8PSM-EDC, an enhanced model that accepts DC power
input. In addition to all of the features of the M8PSM, the M8PSM-E
and -EDC enhancements include higher power output (450 watts — a
50% increase over the standard 300 watts), internal cooling (two fans
are located within the module itself), power factor correction
(M8PSM-E only), and remote management.
Auto-Ranging Power Supply
The M8PSM and M8PSM-E sense and automatically adjust to the
input voltage and frequency. No additional adjustments are necessary.
Built-in Power Supply Protection
The M8PSM, M8PSM-E, and M8PSM-EDC power supply modules
automatically power down under any of the following conditions:
thermal overload (thermal protection); shorted output (over current or

INTRODUCTION
Page 1-6
short circuit protection); or excess output voltage (over voltage
protection).The power supply will automatically recover when a
thermal overload condition is corrected; when an over current or over
voltage condition is corrected,the power supply requires power cycling
(turn power switch off, then on again) to recover.A FAULT LED on the
power supply modules indicates when an over current condition has
occurred.
Power Factor Correction
The M8PSM-E meets the EN60555-2 limits for power factor
correction, which may be required by utility companies in the near
future.
The power factor correction feature provides a number of advantages.
By improving this factor to meet the EN60555-2 limits, line noise and
peak current levels are dramatically reduced and the amount of power
available to the user is increased. Power factor correction also reduces
stress on fuses, circuit breakers, wall sockets, wiring, and
transformers.
Power OK Signal
On the M8PSM, the same signal that illuminates the Power OK LED
on the power supply module will also alert the management module
that the power supply is functioning normally. The M8PSM-E and
-EDC have both red and green power LEDs; power supply status as
indicated by the LEDs will also be sent to the management module.
Redundant Power with Load Sharing
Depending on the power requirements of the installed MIMs, the
MMAC-M8FNB can operate with either one or two power supply
modules. If two power supplies are installed, they share the power
load requirements of the installed MIMs; if one power supply fails,the
second automatically assumes the entire load if it is able.This ensures
that your network will remain operational until a replacement power
supply module can be installed.

INTRODUCTION
Page 1-7
Any two matching power supply modules (i.e., two M8PSMs, two
M8PSM-Es, or two M8PSM-EDCs) will use a current sharing scheme
such that each power supply provides 50% of the required load ( ± 5%,
5V output only) under all load conditions; if you have one M8PSM and
one M8PSM-E installed, the M8PSM-E will supply 60% of the
required power, and the M8PSM will supply the remaining 40%.
Note that, if you have an M8PSM and an M8PSM-E installed in the
same chassis,the redundancy LED on the M8PSM-E will not function.
Note, too, that you cannot mix AC (M8PSM or M8PSM-E) and DC
(M8PSM-EDC) power supplies in the same hub.
Hot Swapping
You have the option to “hot swap” power supply modules in the
M8FNB. This allows you to remove or insert power supplies without
powering down the M8FNB.
Internal Power Supply Cooling
The M8PSM-E and -EDC enhanced power supplies have two fans built
directly into the unit to provide additional cooling; red and green FAN
LEDs on the power supply’s front panel indicate whether all fans are
operational (green) or one or more has failed (red).
Power Level Indicator
The M8PSM-E and -EDC also include an 11-segment LED to indicate
the level of power currently being used by the chassis. Each
illuminated segment represents 10% of the maximum output; the
eleventh segment,when lit, indicates an overload condition. Note that,
if any one power supply is providing more than 50% of its available
power, there is no power supply redundancy available in the chassis.
The power requirements of some FDDI MIM
configurations require dual power supplies. Consult
the
appropriate manuals for details.
NOTE

INTRODUCTION
Page 1-8
Remote Management
The remote management capability built in to the M8PSM-E and
-EDC allows the network manager to determine whether or not an
installed power supply is an E-series model and whether or not power
supply redundancy is available;the M8PSM-Es and -EDCs can also be
remotely disabled if an emergency shutdown is required.
Power supply redundancy is available when two power supplies are
installed in your hub and when neither one is supplying more than
50% of its available power; this applies even when one M8PSM and
one M8PSM-E are combined in the same hub. (You cannot mix AC
[M8PSM or M8PSM-E] and DC [M8PSM-EDC] power supplies in the
same hub.)
In a system in which two power supplies are installed
and each is using more than 50% power, LED segme
nts
5-9 will illuminate yellow, warning of the loss of
redundancy.
NOTE
For access to remote management features, your
MMAC-M8FNB must have the correct backplane
version (chassis revisions EL and above) and you m
ust
have a Cabletron management module which suppo
rts
the M8PSM-E and -EDC. Note also that, although t
he
redundancy feature will function as described above
,
the redundancy LEDs will not illuminate unless you
have two E-series power supplies installed and your
hub has the correct backplane. Contact Cabletron
Systems Technical Support for more information.
NOTE

INTRODUCTION
Page 1-9
Removable Fan Tray
The MMAC-M8FNB is equipped with a removable fan tray, which
means that you can replace a failed fan unit quickly, without any
special tools.The fan tray incorporates an LED that indicates fan
status; the same signal that illuminates the LED also alerts the
management module that the fans are operating properly.
Flexible Network Bus
The MMAC-M8FNB’s Flexible Network Bus allows the installed
power supplies to load share; it also allows Token Ring or FDDI
modules to communicate with one another, and to co-exist with
Ethernet modules in the same hub. Cabletron Systems offers a full
line of media interface modules that let you create new networks and
extend and connect existing networks.
Rack Mountable Chassis
The MMAC-M8FNB chassis can be mounted into a standard 19"
(48.26 cm) equipment rack. For safety and ease of network
connections, separate rack mount brackets are included that allow the
unit to be either flush mounted or recessed 3" from the front plane of
the rack mount unit.
Security Bars
A pair of security bars which fit over the knurled knobs that secure
the MIMs to the chassis protect the hub from unauthorized removal or
insertion of modules.
The fan tray is hot-swappable; however, the MMAC
chassis should not be run for extended periods of tim
e
without the fans installed, as it will quickly overhea
t.

INTRODUCTION
Page 1-10

Page 2-1
CHAPTER 2
INSTALLATION REQUIREMENTS AND
SPECIFICATIONS
This chapter describes the following:
• Site guidelines that must be met before installing an
MMAC-M8FNB onto your network
• MMAC configuration guidelines
• Operating specifications for the MMAC-M8FNB enclosure and
power supply module
2.1 SITE GUIDELINES
The following guidelines must be followed when you select a site for
the MMAC-M8FNB; if they are not, unsatisfactory network
performance may result.
• An unrestricted free surface area of 53.3 cm (21 in.) wide,
62.2 cm (24.5 in.) deep and 44.5 cm (17.5 in.) high is
needed for the MMAC-M8FNB enclosure.
• If the MMAC-M8FNB is to be placed on a shelving unit,
the shelf must be able to support 33.8 kg (75 lb.) of static
weight.
• If the MMAC-M8FNB is to be rack-mounted, care must
be taken to ensure that the rack used will support the
unit and that the rack remains stable with the
MMAC-M8FNB installed. In order to allow proper
Only qualified personnel should install or service this
unit and its modules.

INSTALLATION REQUIREMENTS AND SPECIFICATIONS
Page 2-2
cooling within the rack, there must be 7.6 cm (3 in.) of
clearance above the unit and 5 cm (2 in.) of clearance on
either side of the unit.
• For the M8PSM and M8PSM-E power supplies, a USA
standard 3 prong power receptacle must be located within
2.13 meters (7 feet) of the site. Each M8PSM-EDC power
supplyrequiresapositiveornegativeDCpowersourceat36-72
volts which is capable of supplying 17 amps.
• The temperature of the location must be maintained between
5 ° and 40 ° C (41 ° to 104 ° F).Temperature changes of greater
than 10 ° C (18 ° F) per hour must not occur.
2.2 MMAC-M8FNB CONFIGURATION GUIDELINES
The MMAC-M8FNB has eight slots that accept media interface
modules.The slots are numbered from right to left; slot #1 is a
half-width slot that is reserved for a management module. Cabletron
Systems management modules are equipped with a firmware-based
management tool called Local Management,which lets you control the
MMAC MIMs.Management modules are also SNMP compliant, which
means that an MMAC equipped with a management module can be
managed remotely by SNMP management software (such as any one
of Cabletron Systems’ SPECTRUM
®
for Open Systems suite of
management products.) The M8PSM-E and -EDC power supply
modules can also be managed remotely using appropriate
management software.
You can combine Token Ring, Ethernet, and FDDI MIMs in the same
MMAC; be sure to consult the appropriate management module and
MIM installation guides for detailed setup information.