3Com Router 3031, Command Reference Manual

Page: 179 / 838

E1-F Interface Configuration Commands 179
[3com] display fe1
Serial4/0/0
Fractional E1, status is down.
Work mode is FRAMED - 120 OHM balanced.
Framing : NO-CRC4, Line Code is HDB3, Clock : Slave.
Alarm State : Loss-of-Signal.
Table 4 Description of displaying controller FE1 items
fe1 clock Syntax
fe1 clock { master | slave }
undo fe1 clock
View
E1-F interface view
Parameter
master: Internal clock is used.
slave: Line clock is used.
Description
Using the fe1 clock command, you can configure clock used by an E1-F interface.
Using the undo fe1 clock command, you can restore the default clock of the
interface.
By default, the interfaces use the slave clock.
For an E1-F interface used as DCE, master clock should be used. If the interface is
used as DTE, however, the slave clock should be used.
Example
Set the E1-F interface to use internal clock.
[3com-Serial0/0/0] fe1 clock master
fe1 code Syntax
fe1 code { ami | hdb3 }
undo fe1 code
View
E1-F interface view
Item Description
Framing Frame format (crc4/no-crc4)
Line Code line code format (ami/hdb3)
Clock Clock mode (master/slave)
Alarm State Alarm information