MIM-1E1/MIM-2E1/MIM-4E1/MIM-1E1-F/MIM-2E1-F/MIM-4E1-F Modules 85

Figure 95 75-ohm 4E1 conversion cable

c

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.

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 48 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

Interface

Interface

Interface

Interface

Interface

interface

0

0

1

0

1

2

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:

Page 85
Image 85
3Com MSR 20 manual See Low-End and Mid-Range Series Routers Cable Manual, Module MIM-1E1/1E1-F MIM-2E1/2E1-F MIM-4E1/4E1-F