
Interface Card and Interface Module Manual
H3C MSR 20/30/50 Series Routers
Chapter 3 Multifunctional Interface Modules
3-23
Figure 3-33
75-ohm 4E1 conversion cable
Caution:
Both 75-ohm 4E1 and 120-ohm 4E1 conversion cables are required for
MIM-4E1/4E1-F modules. While E1 cable is optional, please order E1 cables when
purchasing an MIM-4E1 or MIM-4E1-F module. By default, they are not provided.
In addition, a 75-ohm to 120-ohm adapter is provided. For the pinouts of cables, see
Low-End and Mid-Range Series Routers Cable Manual
.
3.6.5 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 3-12
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
Interfa
ce 0
Interfac
e 0
Interfac
e 1
Interfac
e 0
Interfac
e 1
Interfac
e 2
Interfac
e 3