Brocade Communications Systems 6542 Hardware Reference Manual page 19

SFP transceivers provide optical connections to external devices for both short wavelength (SWL) and
long wavelength (LWL) connections. Replace SFP transceivers with a new pluggable unit rather than
replacing the switch module. Refer to the manufacturer's instructions when installing SFP
transceivers.
Brocade 6542 Blade Server SAN I/O Module for Inspur Shangri-la Chassis Hardware Reference Manual
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Switch Module Overview
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