ATTO Technology 2200R/D - Manual (Page 27)

ATTO Technology, Inc. ATTO FibreBridge Installation & Operation Manual
- 22 -
ATTO Technology, Inc.
Both ends of each SCSI bus require termination. The ATTO FibreBridge has built-in automatic
termination. A terminator does need to be placed on the bus after the last SCSI device. It is important
that the correct type of terminator be used for the type of bridge being used: LVD, HVD, or SE.
Figure 6.2 SCSI Termination
Fibre Channel Cabling
Fibre Channel technology offers a variety of cabling options including standard copper, equalized copper,
multimode fiber optic, and single mode fiber optic. The type of cable to use varies depending upon the
application, environment and distance. The following tables illustrate the different cable options available:
Table 6.1 Copper Cable Recommendations
Cable Length Cable Type Connector
< 15 Meters Unequalized DB9
≥
15,
≤
30
Meters
Equalized DB9
Table 6.2 Fiber Optic Cable Recommendations
Cable Length Cable Type Cable Size Connector Laser Type
Up to 175
Meters
Multi Mode 62.5 micron Duplex SC Short Wave
Up to 500
Meters
Multi Mode 50 micron Duplex SC Short Wave
Up to 10
Kilometers
Single Mode 9 micron Duplex SC Long Wave
Fibre optic cable implementations tend to be more expensive than copper, but they are not susceptible to
noise and other interference. If copper Fibre Channel cables are used, it is important to make sure they
are separated from power cables and are not coiled or tangled. Be sure to use a high quality cable
designed specifically for Fibre Channel applications.
GBICs
Some models of the FibreBridge use GBICs as the Fibre Channel interface into the bridge. GBICs are a
small form factor plug-in module that can be removed or inserted without powering off the receiving
socket. They give the flexibility to easily change between copper and optical cables with minimal effort
and configuration time. GBICs are available in Passive, Active, HSSDC and DB9 Copper as well as Long
and Short wave Fibre Optic forms. Passive copper GBICs are not recommended.
ATTO
FibreBridge
Built in
Termination
Termination