H3C MSR 20 - Page 29

SIC-1EPRI/SIC-1E1-F 29
DIP Switch E1/CE1/PRI interface is compatible with both 75-ohm impedance and 120-ohm
impedance. The interface matches different types of impedance through an 8BIT
DIP switch. By default, all the 8 positions of the DIP switch are ON, as shown in the
following figure:
Figure 18 Default setting of the DIP switches
8BIT description and settings of DIP switch are given in the following table:
Operating mode E1
CE1, ISDN PRI (supported by SIC-1EPRI
only)
FE1(supported by SIC-1E1-F only)
Supported service Backup
Terminal access
ISDN (supported by SIC-1EPRI only)
Table 5 Interface attributes of SIC-1EPRI/SIC-1E1-F
Attribute Description
Table 6 Description and settings of the internal DIP switch of SIC-ERRI/SIC-1E1-F
DIP switch Description 75-ohm impedance
120-ohm
impedance
1BIT Switch for
75-ohm/120-ohm
options
ON OFF
2BIT ON OFF
3BIT ON OFF
4BIT ON OFF
5BIT ON OFF
6BIT Switch for RxRing
grounding mode
options
OFF: RxRing grounding
via capacitor
ON: RxRing directly
grounding
-
on
1
2
3
4
5
6
7
8