3Com SuperStack 3 4950, Руководство по началу работы

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26 C
HAPTER
2: I
NSTALLING THE
S
WITCH
Inserting a GBIC
Transceiver
To be recognised as valid, the GBIC transceiver must have the following
characteristics:
■
1000BASE-SX, 1000BASE-LX or 1000BASE-LH70 media type:
■
1000BASE-SX GBIC transceiver
Use this transceiver to connect the Switch directly to a multimode
fiber-optic cable.
■
1000BASE-LX GBIC transceiver
Use this transceiver to connect the Switch directly to a single-mode
fiber-optic cable or to multimode fiber using a conditioned launch
cable.
■
1000BASE-LH70 GBIC transceiver
Use this transceiver to connect the Switch directly to a single-mode
fiber-optic cable or to multimode fiber using a conditioned launch
cable.
■
Fiber SC connector
■
Type 4 GBIC with internal EEPROM fitted.
If the GBIC transceiver is faulty, it will not operate within the Switch. See
“Solving Hardware Problems” on page 41 .
Do not use non-3Com GBICs. If the GBIC transceiver is invalid it will not
be recognised by the Switch.
Use the following sequence of steps to activate the GBIC ports.
1 To insert one of the transceivers into a GBIC expansion port on the
Switch:
a Orient the transceiver so that the fiber-optic duplex subscriber
connecter (SC) is toward you, as shown in
Figure 4 .
b Gently slide the transceiver into the GBIC port until it clicks into place.
2 If you wish to remove the transceiver, compress the side tabs and gently
pull the transceiver out of the port.
CAUTION: GBIC transceivers are keyed and can be properly inserted only
one way. If the transceiver does not click when you insert it, remove it,
turn it over, and reinsert it.