.SAN design reference guide Vol. 1-5 785350-001

use of duplex couplers, provided that you do not exceed the overall cable loss budget for that
cable segment.
HP recommends the use of HP PremierFlex OM4 and OM3+ fiber optic cables for 50 micron cable
installations. HP PremierFlex OM3+ fiber optic cables provide higher bend performance and
improved signal-transmission integrity, providing significant improvements in signal quality over
industry-standard OM3 fiber optic cable technologies.
For more information on PremierFlex, see:
• PremierFlex video: http://h30428.www3.hp.com/?
fr_story=12f70d1056643c69d0754fe491bd218c3859a2e0&rf=bm
• PremierFlex data sheet: http://h20195.www2.hp.com/v2/GetPDF.aspx/
4AA2-6479ENUC.pdf
• Cables portfolio data sheet: http://h20195.www2.hp.com/v2/GetPDF.aspx/
4AA2-4964ENUC.pdf
NOTE: OM3+ is an HP designation indicating that the product exceeds all OM3 standards.
OM3+ fiber optic cables specify a modal bandwidth of 3,000 MHz-km at 850 nm.
HP also supports industry standard fiber optic cable types OM4, OM3, OM2, and OM1. See
“Fiber optic cable loss budgets” (page 154).
For cable part numbers, see the Fibre Channel switch QuickSpecs at http://www.hp.com/go/
QuickSpecs.
Table 59 (page 153) describes the rules for fiber optic cable connections.
Table 59 Rules for fiber optic cable connections
Description
Rule
number
Minimum bend radius—HP PremierFlex 50 micron OM4 and OM3+ fiber optic cable, 7 mm. Industry
standard OM3, OM2, OM1, 25 mm for 50, 62.5, and 9 micron fiber optic cable. HP recommends 50
1
micron fiber optic cable for new installations that require multi-mode fiber connections. The 62.5 micron
fiber optic cable is acceptable for existing installations. See Table 63 (page 156) for supported maximum
cable distances.
HP does not support a mixture of 50, 62.5, and 9 micron cable in the same cable segment.2
Note: A cable segment is defined as one or more cables connected serially between two transceivers.
HP does not support a mixture of different OM fiber cable types in the same cable segment.3
For all cable segments, you must use the same transceiver type at both ends of the cable (for example,
short-wave transceiver to short-wave transceiver, long-wave transceiver to long-wave transceiver). HP does
not support mixing transceiver types in the same cable segment.
4
For fabric attachment, the minimum cable segment length between Fibre Channel components (transmitter
and receiver) is:
5
• 0.5 m for 50 and 62.5 micron cable
• 2.0 m for 9 micron cable
The minimum length does not apply to patch cords through a passive patch panel; it applies only to the
total distance between the transmitter and receiver of each device connected through the patch panel.
For fiber optic cable lengths greater than 50 m, contact a third-party vendor. 50 micron cable must be
duplex, tight-buffered multi-mode 50/125 µm (Belcore GR-409 compliant). The connectors must be SC
or LC duplex low metal (Belcore and IEC compliant).
6
9 micron cable must be duplex, tight-buffered, single-mode 9/125 µm (Belcore GR-409 compliant). The
connectors must be SC or LC duplex low metal (NTT-SC Belcore 326, IEC-874-19 SC compliant).
SAN fabric connectivity rules 153