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Customer Service Information

Call: (724) 746-5500

Phone orders 24 hours a day,  7:00 AM Monday to

midnight Friday; 8:00 AM to 4:00 PM Saturday (EST)

Fax: (724) 746-0746

or in North America 

1-800-321-0746

Mail order:

Black Box Corporation, 1000 Park Drive, Lawrence, PA 

15055-1018

Technical Support and fax orders 24 hours a day

Federal Communications Commission Radio Frequency Interference Statement

This equipment generates, uses, and can radiate radio frequency energy that may cause interference to

radio communication if not installed and used in strict accordance with the manufacturer’s instructions.  It
has been tested and found to comply with the limits for a Class A computing device in accordance with the
specifications in Subpart J of Part 15 of FCC rules, which are designed to provide reasonable protection
against such interference when the equipment is operated in a commercial environment.  Operation of this
equipment in a residential area is likely to cause interference, in which case the user at his own expense will
be required to take whatever measures may be necessary to correct the interference.

Changes or modifications not expressly approved by the party responsible for compliance could void the

user’s authority to operate the equipment.

This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus

set out in the Radio Interference Regulation of the Canadian Department of Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux

appareils numériques de classe A prescrites dans le Règlement sur le brouillage radioélectrique publié par le
ministère des Communications du Canada.

Safety Certifications

UL:

Listed to UL1950 and CSA 22.2, No. 950, Safety of Information Technology
Equipment, Including Electrical Business Equipment.

TUV/GS:

Certified to EN 60 950, Safety of Information Technology Equipment, Including
Electrical Business Equipment.

CE:

The products described herein comply with the Council Directive on
Electromagnetic Compatibility (89/336/EEC) and the Council Directive on Electrical
Equipment Designed for use within Certain Voltage Limits (73/23/EEC).  For further
details, contact Black Box Corporation.

NOTE: Modules are FCC approved and UL, TUV/GS and CE certified when installed in a Black Box chassis only.

1000 Park Drive • Lawrence, PA 15055-1018 USA  

TEL: (724) 746-5500 • FAX: (724) 746-0746 

EMAIL: info@blackbox.com

WEB: http://www.blackbox.com

© 1992 - 2001 Black Box Corporation.  All rights reserved.

The information in this document is subject to change without notice.  Black Box Corporation assumes no responsibility for any
errors that may appear in this document.  Specific brands and product names may be trademarks and are the property of their
respective companies.

Document Number  51-80780BB-00 D2

November 2001

12

11

LEDs on S2MM

The following diagram shows the LEDs on an 

S2MM:

Each module in 

S2MM Module Sets

has one Activity LED.  This LED

glows green in normal operation.

Fiber Optic Cleaning Guidelines

Fiber optic transmitters and receivers are extremely susceptible to contamination by

particles of dirt or dust which can obstruct the optic path and cause performance degradation.
Good system performance requires clean optics and connector ferrules.

1) Use fiber patch cords (or connectors, if you terminate your own fiber) only from a

reputable supplier; low quality components can cause many hard-to-diagnose problems
in an installation.

2) Dust caps are installed at the factory to ensure factory-clean optical devices.  These

protective caps should not be removed until the moment of connecting the fiber cable to
the device.  Assure that the fiber is properly terminated, polished and free of any dust or
dirt and that the location is as free from dust and dirt as possible.

3) Store spare caps in a dust free environment such as a sealed plastic bag or box so that

when reinstalled they do not introduce any contamination to the optics.

4) Should it be necessary to disconnect the fiber device, reinstall the protective dust caps.

5) If you suspect that the optics have been contaminated, alternate between blasting with

clean dry compressed air and flushing with methanol to remove particles of dirt.

Electrostatic Discharge Precautions

Electrostatic discharge (ESD) can cause damage to your add-in modules.  Always observe

the following precautions when installing or handling an add-in module or any board assembly.

1) Do not remove unit from its protective packaging until you’re ready to install it.

2) Wear an ESD wrist grounding strap before handling any module or component.  If you do

not have a wrist strap, maintain grounded contact with the system unit throughout any
procedure requiring ESD protection.

WARNING! Integrated circuits and fiber optic components are extremely susceptible to

electrostatic discharge damage.  Do not handle these components directly unless you are
a qualified service technician and use tools and techniques that conform to accepted
industry practices.

3) Hold boards by the edges only; do not touch the electronic components or gold

connectors.

4) After removal, always place the boards on a grounded, static free surface, ESD pad or in a

proper ESD bag.  Do not slide the board over any surface.

Summary of Contents for LE740-TPSTM

Page 1: ...408A LE740 BNSTM LE740 SMMM2 LE740 SMMM LE7404A LH740 TPSCM LH740 TPSTS LH740 TPSCS LE7401A LH740 TPSTS20 LH740 TPSCS20 LE7412A LE7401A R2 LE7412A DC LE7412A 2DC LH740 TPSTM LE7412A 2 LE740 TPSTS About 10 Mbps Media Conversion Modules Media conversion modules for 10 Mbps Ethernet have two different types of ports on them and require one slot in a Media Converter chassis for a single 10 Mbps Ethern...

Page 2: ...for a single shielded or unshielded twisted pair link segment Each twisted pair port features a 2 position switch located at position S1 for selecting a crossover workstation connection or pass through repeater hub connection The switch is labeled with X for a crossover connection factory default and a ll for a pass through connection To select the appropriate setting simply move the switch to the...

Page 3: ... OFF indicating a break in the fiber loop FiberAlert X LED XMT RCV 5 6 in the fiber loop Using FiberAlert a local site administrator is notified of a fault and can quickly determine where a cable fault is located FiberAlert should only be enabled on one side of a media conversion Enabling it on both sides would keep both transmitters off indefinitely Using FiberAlert and LinkLoss In a typical cent...

Page 4: ... Media conversion modules are shipped with brackets for securing them to the Media Converter chassis Media conversion modules attach to a connector inside the Media Converter chassis To install a module simply unscrew the blank bracket covering the slot where the module is to be installed slide the module into the chassis via the cardguides until the module is seated securely in the connector Secu...

Page 5: ...t The function of the LED next to the Fiber Link LED depends on whether FiberAlert is enabled If FiberAlert is disabled this LED functions as an Activity LED and flickers amber when activity is detected on the fiber port If FiberAlert is enabled this LED glows amber upon power up then flickers when activity is detected on the fiber port The Twisted Pair Link LED glows green when a link is establis...

Page 6: ...d The information in this document is subject to change without notice Black Box Corporation assumes no responsibility for any errors that may appear in this document Specific brands and product names may be trademarks and are the property of their respective companies Document Number 51 80780BB 00 D2 November 2001 12 11 LEDs on S2MM The following diagram shows the LEDs on an S2MM Each module in S...

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