- ATTO FibreBridge Installation & Operations Manual

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