3Com 3031 Command Reference Manual page 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
Item
Framing
Line Code
Clock
Alarm State
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
E1-F Interface Configuration Commands
Description
Frame format (crc4/no-crc4)
line code format (ami/hdb3)
Clock mode (master/slave)
Alarm information
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