METRODATA LTD
WCM1100 / WCM3100 / WCM-Serial
User Manual
76-02-082 Rev J
82 of 140
5.3.4.1 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.
5.3.4.2 Interface
The WAN port physical interface may be selected as below:
E3
The WAN port operates in E3, G.703 mode at
34.368Mbps. The interface can operate in G.832 Framed
mode or clear channel, unframed mode.
DS-3
The WAN port operates in DS-3, G703 mode at
44.736Mbps. The interface can operate in C-Bit Framed
mode or clear channel, unframed mode.
5.3.4.3 Timing
The WAN port may be operated in either:
Internal
Transmit Timing derived from the internal oscillator
Loop
Transmit Timing derived from the Receive Timing. Under loss of
signal conditions, the timing will fall back to the local oscillator.
5.3.4.4 TX Line Build Out (DS-3 mode Only)
The DS-3 standard defines the wave shape at the far end of the cable and as such to
prevent overdrive of a short cable run, the transmitter power may be reduced.
The line build out configures the interface to drive cables of differing lengths as below:
0
– 225ft
Set for Shorter cable runs
>225ft
Set for longer cable runs upto 450ft.
