3Com 3C13840, Руководство по установке

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4-port Channelized E1/PRI FIC (3C13866) and 4-port Fractional E1 FIC (3C13823) 65
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X.21 DTE cable: DB15 (male) connector at the network end
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X.21 DCE cable: DB15 (female) connector at the network end
One end of the cables is connected to the router side via the DB-28 connector, and
the connection of the other end of the cables varies with the network side to
which it is connected.
Connecting the Interface
Cable
CAUTION: Before connecting the FIC, confirm the model of the equipment that is
connected with the signaling criterion required by the access equipment, baud
rate, and synchronous clock.
1 Check interface type of the peer device and choose the sync/async serial interface
cable of correct type.
2 Plug the DB-28 end of the connection cable to the corresponding DB-28 interface
in the FIC.
3 Connect the other end of the FIC cable to the following equipment:
If the WAN is a DDN, please connect the cable to the interface of the CSU/DSU.
If the WAN is a dialup line, please connect the cable to the serial interface of the
analog Modem.
4 Power on the router, and check the status of the LINK LED of the FIC. It is off when
the line is faulty and signal is out of step.
4-port Channelized
E1/PRI FIC (3C13866)
and 4-port Fractional
E1 FIC (3C13823)
4-port Channelized FIC
4-port Channelized FIC function to transmit, receive, and process E1 data
flows. In addition, they provide access to CE1, implementing the ISDN PRI
function, so that one board can serve multiple purposes.
4-port Fractional FIC
4-port Fractional FIC are fractional E1 (E1-F) cards. They are different from
4-port Channelized FIC primarily in the sense that:
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The time slots can only be bundled into one channel at the speed of nx64K,
given n=1-31. However, an E1 card allows the arbitrary grouping of 31
channels and multiple bundling operations.
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The E1-F cards do not support PRI mode.
Interface Attributes The following table describes the interface attributes of 4-port Channelized FIC
and 4-port Fractional FIC.
Table 7 Interface attributes of 4-port Channelized FIC and 4-port Fractional FIC