H3C Technologies H3C MSR 50 - Manual (Page 77)

2-57
Figure 2-71 Default setting of DIP switches
on
1
2
3
4
5
6
7
8
Description of DIP switch settings is given in the following table:
Table 2-45 Description of DIP switch settings of SIC-ERRI/SIC-1E1-F
DIP Description
Configuration of
75-ohm impedance
Configuration of
120-ohm impedance
1BIT ON OFF
2BIT ON OFF
3BIT ON OFF
4BIT ON OFF
5BIT
75-ohm/120-ohm
selection switch
ON OFF
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.
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.
Interface LEDs
The following figure illustrates the SIC-1VE1 panel.