METRODATA LTD
WCM1100 / WCM3100 / WCM-Serial / LHM1000 / LVM2000 User Manual
76-02-082 Rev N
93 of 169
5.3.3.2 State
The state configuration defines the Administrative State of the WAN port. For normal
operation it must be set to UP.
In applications where the WAN link is not used, the state should be set to Down to disable
the alarm processing on the WAN port.
5.3.3.3 Interface
The WAN port physical interface may be selected as below:
Unbalanced (BNC)
E1 port operates in 75ohm, unbalanced mode presented
on BNC connectors
Balanced (RJ45)
E1 port operates in 120ohm, balanced mode presented on
the RJ45 connector.
T1 (RJ45)
T1 port operates in 100Ohm, balanced mode presented
on the RJ45 connector
Following a cold start, the default setting is determined by the position of bit switch 6 which
selects between the E1 options.
5.3.3.4 Timing
The WAN port may be operated in either:
Internal
Transmit Timing derived from the internal oscillator
Loop
Transmit Timing derived from the Line Receive Timing. Under loss
of signal conditions, the timing will fall back to the local oscillator.
Following a cold start, the default setting is determined by the position of bit switch 5.
