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Interface Card and Interface Module Manual
H3C MSR 20/30/50 Series Routers
Chapter 2 Smart Interface Cards
2-31
Attribute
Description
Operation mode
CE1
ISDN PRI (only supported by SIC-1VE1)
R2
Services
Backup
Terminal access
ISDN (only supported by SIC-1VE1)
2.9.3 DIP Switches
CE1/PRI/R2 interface is compatible with 75-ohm and 120-ohm impedance. Matching of
different impedance is implemented through an 8BIT DIP switch. By default, all the DIP
switches are set to ON, as illustrated in the following figure:
on
1
2
3
4
5
6
7
8
Figure 2-35
Default setting of DIP switches
Description of DIP switch settings is given in the following table:
Table 2-21
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