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Interface Card and Interface Module Manual
H3C MSR 20/30/50 Series Routers
Chapter 2 Smart Interface Cards
2-32
DIP
Description
Configuration of
75-ohm
impedance
Configuration of
120-ohm
impedance
6BIT
RxRing grounding
mode selection
switch
OFF: RxRing is
grounded via
capacitance.
ON: RxRing is
grounded directly.
—
7BIT
RxShield
grounding mode
selection switch
—
ON: RxShield is
grounded.
OFF: RxShield is
not grounded.
8BIT
SxShield
grounding mode
selection switch
—
OFF: RxShield is
grounded via
capacitance
ON: RxShield is
grounded directly.
Caution:
z
It is recommended to select the DIP switch in this way: when connecting 75-ohm
cable, flip BIT1-8 to ON, and when connecting 120-ohm cable, flip BIT1-8 to OFF.
z
By default, all of the DIP switches are factory-configured to ON, that is, the
impedance of E1 interface is 75-ohm.
2.9.4 Interface LEDs
The following figure illustrates the SIC-1VE1 panel.
Figure 2-36
SIC-1VE1 panel
The following table describes the LEDs on the SIC-1VE1 panel.