3Com 3C13840, Руководство по установке

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64 C
HAPTER
8: F
LEXIBLE
I
NTERFACE
C
ARDS
Panel and Interface LEDs The front panel of 4-port FIC is shown as follows:
Figure 5 4-port Sync/Async panel
The meanings of the LEDs on 4-port FIC are given in the following table:
Table 6 4-port FIC LEDs
The front panel of 8-port FIC is shown as follows:
Figure 6 8-port FIC front panel
On 8-port FIC, each link corresponds to a LED. ON means the link is connected.
Blinking means data is being transceived.
Interface Cable The FIC uses sync/async serial interface cable with DB28 connector. V.24 (RS232)
DTE cable: DB25 (male) connector at the network end
■
V.24 (RS232) DCE cable: DB25 (female) connector at the network end
■
V.35 DTE cable: 34PIN (male) connector at the network end
■
V.35 DCE cable: 34PIN (female) connector at the network end
Services Supported
DDN leased
line
Terminal
access
service
Dialup through
Modem
Backup
Async leased line
Dumb terminal
access
Table 5 Interface attributes of 4-port Sync/Async FIC and 8-port Sync/Async FI
Attribute Description
LINK
OFF means the link is not connected. ON means the link is
connected.
ACT
OFF means no data is being transceived. Blinking means data
is being transceived.