H3C Technologies H3C MSR 50 - Manual (Page 140)

3-36
Internal DIP switches
MIM-1E1/MIM-2E1/MIM-4E1 and MIM-1E1-F/MIM-2E1-F/MIM-4E1-F modules provide internal DIP
switches, and the setting of DIP switches decides the interface impedance and grounding mode.
Table 3-32 Correlation between DIP switches of MIM-1E1/MIM-2E1/MIM-4E1 and
MIM-1E1-F/MIM-2E1-F/MIM-4E1-F modules and E1 interface
Module MIM-1E1/1E1-F MIM-2E1/2E1-F MIM-4E1/4E1-F
DIP switch S1 S1 S2 S1 S3 S4 S5
E1 interface
Interface
0
Interface 0 Interface 1 Interface 0 Interface 1 Interface 2 Interface 3
By default, all the DIP switches for MIM-1E1/MIM-2E1/MIM-4E1 and
MIM-1E1-F/MIM-2E1-F/MIM-4E1-F modules are set to ON, as illustrated in the following figure:
Figure 3-41 Default setting of DIP switches for MIM-1E1/MIM-2E1/MIM-4E1 and
MIM-1E1-F/MIM-2E1-F/MIM-4E1-F modules
on
1
2
3
4
5
6
7
8
Description of DIP switch settings is given in the following table for MIM-1E1/MIM-2E1/MIM-4E1 and
MIM-1E1-F/MIM-2E1-F/MIM-4E1-F modules:
Table 3-33 Description of DIP switch settings of MIM-1E1/MIM-2E1/MIM-4E1 and
MIM-1E1-F/MIM-2E1-F/MIM-4E1-F modules
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.
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