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Interface Card and Interface Module Manual
H3C MSR 20/30/50 Series Routers
Chapter 3 Multifunctional Interface Modules
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3.7.5 Connecting the Interface Cable
Caution:
Before you connect a port, read its label carefully; a wrong connection can impair the
interface module and even damage the device.
You are recommended to install a special lightning arrester at the input end of the
interface cable for better lightning protection.
Step 1: Choose an 8E1 conversion cable appropriate to the interface type of the peer
device.
z
If the interface impedance of the peer device is 75-ohm, use a 75-ohm
ҏ
8E1
conversion cable.
z
If the interface impedance of the peer device is 120-ohm, use a 120-ohm
ҏ
8E1
conversion cable.
Step 2: Insert the DB-68 connector of the cable to the DB-68 port on the
MIM-8E1/MIM-8E1-F module, and fasten the cable fastening screws.
Step 3: Identify the sequence number of the other end of the MIM-8E1/MIM-8E1-F
conversion cable and connect it with a peer device.
Step 4: Power on the router. 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.
3.8 MIM-1T1/MIM-2T1/MIM-4T1/MIM-1T1-F/MIM-2T1-F/MIM-4T
1-F Modules
3.8.1 Introduction
I. MIM-1T1/MIM-2T1/MIM-4T1 module
1/2/4-port channelized T1/PRI interface module (MIM-1T1/MIM-2T1/MIM-4T1) serves
to transmit/receive and handle T1 data streams, provide CT1 access, and fulfill the
function of ISDN PRI. Thereby, one card can be used for multiple purposes.
II. MIM-1T1-F/MIM-2T1-F/MIM-4T1-F
1/2/4-port fractional T1 interface module (MIM-1/2/4T1-F) and MIM-1/2/4T1 module are
different in the sense that:
z
FT1 operating mode supported by T1-F modules allows only one bundle. In other
words, the time slots can only be bundled into one nx64 kbps or 56 kbps channel,