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3Com Router 5000 and Router 6000 v2.41
Module Guide
Chapter 4 Flexible Interface Cards (Router 6000)
4-31
4.9 Router 1-Port CE3 FIC
4.9.1 Introduction
Router 1-Port CE3 FIC, the 1-port channelized E3 interface card, delivers these
functions:
z In E3 mode, transmitting, receiving, and processing one channel of E3 fast traffic;
providing E3 traffic access.
z In CE3 mode, providing the subscribers with N x 64 kbps low-speed access,
where N is smaller than or equal to 128.
Note:
E3 represents the tertiary group rate of E system in the TDM system, that is, 34.368 Mbps. Through E23
and E12 demultiplexing, an E3 channel can be channelized into 16 E1 lines, each supporting both the
E1 and CE1 modes. E23 means either E2-to-E3 multiplex or E3-to-E2 demultiplex, and E12 means
E1-to-E2 multiplex or E2-to-E1 demultiplex. “E23” and “E12” discussed here represent the demultiplex
process.
4.9.2 Interface Attributes
The following table describes the interface attributes of the Router 1-Port CE3 FIC.
Table 4-19 Router 1-Port CE3 FIC interface attributes
Attribute Description
Connector SMB
Number of connectors
2
Interface standard
G.703, G.704, G.751
Interface rate
34.368 Mbps
Cable type
E3 cable (75-ohm coaxial cable)
Operating mode
E3
CE3
Supported service
E3 leased line