Handling Fibre-Optic Cables - IBM DS4700 Installation, User's, And Maintenance Manual

CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or
transmitters) are installed, note the following:
v Do not remove the covers. Removing the covers of the laser product could
v Use of controls or adjustments or performance of procedures other than
DANGER

Handling fibre-optic cables

Attention:
v For devices on slide rails, leave enough slack in the cables so they do not bend
v Do not overtighten the cable straps or bend the cables to a diameter of less than
v When storing excess or unused fibre-optic cables, do not bend the cables to a
v Loop diameter of 76 mm (3 in.) and bend radius of 38 mm (1.5 in.) for fibre-optic
v Do not route the cable along a folding cable-management arm.
v Route the cable away from places where it can be damaged by other devices in
v Do not put excess weight on the cable at the connection point. Be sure that the
v Do not use plastic cable ties in place of the provided cable straps.
v The following are the supported maximum cable lengths:
result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.
those specified herein might result in hazardous radiation exposure.
Some laser products contain an embedded Class 3A or Class 3B laser
diode. Note the following.
Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.
To avoid damage to your fibre-optic cables, follow these guidelines:
to a diameter of less than 76 mm (3 in.), or a radius less than 38 mm (1.5 in.),
when extended or become pinched when retracted.
76 mm (3 in.), or a radius less than 38 mm (1.5 in.).
diameter of less than 76 mm (3 in.), or a radius less than 38 mm (1.5 in.) or wrap
them around themselves. See Figure 33 on page 58.
cables are IBM DS4000 recommended minimums. Loops or bends smaller than
this recommendation may cause damage to your fiber optic cables. It is best
practice to use loop diameters and bend radii that are greater than these
recommended minimums.
the rack cabinet.
cable is well supported.
– 1 Gbps: 500 meters 50/125 um fiber, 300 meters 62.5/125 um fiber
– 2 Gbps: 300 meters 50/125 um fiber, 150 meters 62.5/125 um fiber
– 4 Gbps: 150 meters 50/125 um fiber, 70 meters 62.5/125 um fiber
Chapter 3. Cabling the storage subsystem
57