SMC Networks 7824M/FSW, Installation Manual

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D
ESCRIPTION OF
H
ARDWARE
1-5
SFP Slots
The Small Form Factor Pluggable (SFP) transceiver slots are shared with
RJ-45 ports (ports 25~26 on the front panel or ports 27~28 on the
optional modules). In its default configuration, if an SFP transceiver
(purchased separately) is installed in a slot and has a valid link on its port,
the associated RJ-45 port is disabled and cannot be used. The switch can
also be configured to force the use of an RJ-45 port or SFP slot, as
required.
Note that 1000BASE-SX transceivers use multimode duplex fiber cable,
while 1000BASE-LX and 1000BASE-ZX transceivers use single-mode
duplex fiber cable.
Alarm Interface Port
The DB-15 alarm port on the switch’s front panel can be used to provide
alarm, service port, and BITS clock reference interfaces. The switch
supports two sets of alarm relay contacts (major and minor), and 4 external
customer site alarm inputs. It also provides an alarm cutoff button (labeled
ACO). Refer to “Connecting to the Alarm Port” on page 3-15 for a
description of the pin assignments used to connect to the alarm port.
Table 1-1 Optional SFP Transceivers
1000BASE-SX (SMCBGSLCX1)
1000BASE-LX (SMCBGLLCX1)
1000BASE-ZX (SMCBGZLCX1)