HP Surestore 64 Planning Guide - Page 69

Data Transmission Distance

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CAUTION When equipped with native Fibre Channel adapters, this product contains a laser internal to the small form factor pluggable (SFP) transceiver module on the 4-port FPM cards. In the USA, the SFP module is certified as a Class 1 Laser product, conforming to the requirements contained in Department Of Health and Human Services (DSHS) regulation 21 CFR, Subchapter J. The certification is indicated by a label on the metal SFP housing. Outside the USA, the SFP is certified as a Class 1 Laser product conforming to the requirements contained in IEC 825-1:1993 and EN 60825-1:1994, including Amendment 11:1996. Each communications port consists of a transmitter and receiver optical subassembly. The transmitter subassembly contains internally a semiconductor laser diode in the wavelength of either 850 nanometers (shortwave laser) or 1310 nanometers (longwave laser). Consider the following when determining the number and type of each transceiver to use: • Distance between a director and device or between directors participating in an ISL as part of a multiswitch fabric. • Cost effectiveness. • Device restrictions or requirements with respect to existing fiber-optic cable (multimode or singlemode). Data Transmission Distance Data transmission distance is the primary factor governing the choice of optical fiber and transceiver type. If the transmission distance is less than 175 meters, 50/125-micron or 62.5/125-micron multimode optical fiber can be used in conjunction with a shortwave transceiver. If the transmission distance is between 175 and 500 meters, 50/125-micron multimode optical fiber can be used in conjunction with a shortwave transceiver. If the transmission distance exceeds 500 meters (up to 10 km), only 9/125-micron singlemode optical fibre can be used in conjunction with a longwave transceiver. Variables such as the number of connections, grade of fiber-optic cable, device restrictions, application restrictions, buffer-to-buffer credit limits, and performance requirements can affect transmission distance. Planning Considerations Port Connectivity and Fiber-Optic Cabling 55

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Port Connectivity and Fiber-Optic Cabling
55
Planning Considerations
C
AUTION
When equipped with native Fibre Channel adapters, this product contains a
laser internal to the small form factor pluggable (SFP) transceiver module on
the 4-port FPM cards.
In the USA, the SFP module is certified as a Class 1 Laser product, conforming
to the requirements contained in Department Of Health and Human Services
(DSHS) regulation 21 CFR, Subchapter J. The certification is indicated by a
label on the metal SFP housing. Outside the USA, the SFP is certified as a Class
1 Laser product conforming to the requirements contained in IEC 825-1:1993
and EN 60825-1:1994, including Amendment 11:1996.
Each communications port consists of a transmitter and receiver optical
subassembly. The transmitter subassembly contains internally a
semiconductor laser diode in the wavelength of either 850 nanometers
(shortwave laser) or 1310 nanometers (longwave laser).
Consider the following when determining the number and type of each transceiver to use:
•
Distance between a director and device or between directors participating in an ISL as
part of a multiswitch fabric.
•
Cost effectiveness.
•
Device restrictions or requirements with respect to existing fiber-optic cable
(multimode or singlemode).
Data Transmission Distance
Data transmission distance is the primary factor governing the choice of optical fiber and
transceiver type. If the transmission distance is less than 175 meters, 50/125-micron or
62.5/125-micron multimode optical fiber can be used in conjunction with a shortwave
transceiver. If the transmission distance is between 175 and 500 meters, 50/125-micron
multimode optical fiber can be used in conjunction with a shortwave transceiver. If the
transmission distance exceeds 500 meters (up to 10 km), only 9/125-micron singlemode
optical fibre can be used in conjunction with a longwave transceiver.
Variables such as the number of connections, grade of fiber-optic cable, device restrictions,
application restrictions, buffer-to-buffer credit limits, and performance requirements can
affect transmission distance.