3Com Router Module Guide
Chapter 3 Multifunctional Interface Modules
3-60
2) Connect one RJ-45 connector of the ROUTER 4-PORT T1 IMA MIM conversion
cable to a peer device.
3) Check the status of the LINK LED on the panel of the ROUTER 4-PORT T1 IMA
MIM interface card. If the LED is off (indicating the line is faulty), check the line.
3.16 Router 1-Port CE3 MIM Module
3.16.1 Introduction
1-port channelized E3 interface module (Router 1-Port CE3 MIM) serves to:
z
Transmit/Receive and handle one channel of E3 fast traffic, as well as provide the
accessing of E3 traffic when working in E3 mode; and
z
Provide the low-speed accessing service at the speed of n x 64 kbps, where n is
smaller than or equal to 128, when working in CE3 mode.
Note:
E3 represents the tertiary group rate of E system in the TDM system, that is, 34.368Mbps. An E3
channel can be channelized into 16 E1 lines through the demultiplexing processes of E23 and E12, each
E1 line supporting both the operating modes of E1 and CE1. E23 is used to indicate either E2-to-E3
multiplex or E3-to-E2 demultiplex, and E12 to indicate E1-to-E2 multiplex or E2-to-E1 demultiplex. “E23”
and “E12” discussed here represent the demultiplex process.
3.16.2 Interface Attributes
The interface attributes of Router 1-Port CE3 MIM are given in the following table:
Table 3-38
Interface attributes of Router 1-Port CE3 MIM
Attribute
Description
Connector SMB
Number of connectors
2
Interface standard
G.703, G.704, G.751
Interface rate
34.368Mbps
Interface cable type
E3 cable (75ohm coaxial cable)
Operating mode
E3
CE3
Services supported
E3 leased line