H3C Technologies H3C MSR 50 - Manual (Page 143)

3-39
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If the resistance of the port on the device to be connected is 75-ohm, select a 75-ohm E1
unbalanced coaxial cable and a 75-ohm 4E1 conversion cable, and set all the DIP switches on the
MIM-4E1/MIM-4E1-F module to “ON” (that is, the port resistance is 75-ohm).
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If the resistance of the port on the device to be connected is 120-ohm, select a 120-ohm E1
balanced twisted pair cable and a 120-ohm 4E1 conversion cable, and set all the DIP switches on
the MIM-4E1/MIM-4E1-F module to “OFF” (that is, the port resistance is 120-ohm).
Step2 Plug the DB-25 connector of the 4E1 conversion cable into a DB-25 port on MIM-4E1 or MIM-4E1-F
module, and tighten the screws;
Step3 Connect the DB-15 connector of the 4E1 conversion cable to the E1 cable, making sure of wire
sequence of the connector;
Step4 Connect the E1 cable to the device to be connected. For the procedures, see the previous subsection
“ Connecting interface cable of MIM-1E1/MIM-2E1 and MIM-1E1-F/MIM-2E1-F/MIM-4E1-F modules ”;
Step5 Check the behavior of the LINK LED on the module panel. It is OFF when fault has occurred on the link
and signal is out of synchronization. In this case, please check the link.
MIM-8E1/MIM-8E1-F
Introduction
1) MIM-8E1 module
MIM-8E1, the 8-port channelized E1/PRI interface module, transmits, receives, and processes eight
channels of E1 data traffic. In addition, you can use the module for other purposes, such as CE1 access
and the ISDN PRI function.
2) MIM-8E1-F module
MIM-8E1-F, the 8-port fractional E1 interface module is different from the MIM-8E1 module in the sense
that:
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The FE1 operating mode supported by the MIM-8E1-F module allows only one n × 64 kbps bundle
to be formed on each interface, where n = 1 to 31. However, an MIM-8E1 module allows arbitrary
grouping of 31 channels and therefore multiple bundles.
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The MIM-8E1-F module does not support PRI mode.
Given a MIM-8E1 module, the system automatically creates a serial interface for each timeslot bundle
formed on a controller E1 interface.
Interface attributes
The interface attributes of the MIM-8E1 and the MIM-8E1-F are given in the following table:
Table 3-34 Interface attributes of the MIM-8E1 and the MIM-8E1-F
Description
Attribute
MIM-8E1/MIM-8E1-F module (75-ohm)
MIM-8E1/MIM-8E1-F module
(120-ohm)
Connector DB-68