3Com Router Module Guide
Chapter 2 Smart Interface Cards
2-15
on
1
2
3
4
5
6
7
8
Figure 2-14
Default setting of the DIP switches
8BIT description and settings of DIP switch are given in the following table:
Table 2-10
Description and settings of the internal DIP switch of SIC-ERRI/ROUTER 1-PORT
FRACTIONAL E1 SIC
DIP switch
Description
75 -ohm
impedance
120 -ohm impedance
1BIT
ON
OFF
2BIT
ON
OFF
3BIT
ON
OFF
4BIT
ON
OFF
5BIT
Switch for
75-ohm/120-ohm
options
ON
OFF
6BIT
Switch for RxRing
grounding mode options
OFF: RxRing
grounding via
capacitor
ON: RxRing directly
grounding
-
7BIT
Switch for RxShield
grounding options
-
ON: RxShield grounding
OFF: RxShield
ungrounding