3Com 3C13840, Installation Manual

Page: 71 / 82

1-port Channelized E3 FIC (3C13888) 71
1-port Channelized E3
FIC (3C13888)
The main functions of 1-port Channelized E3 FIC include:
■
Working in E3 mode, the card can transmit/receive and process the fast traffic
of one E3 channel, as well as provide the accessing of E3 traffic.
■
Working in CE3 mode, the card can provide the subscribers with the low-speed
accessing service at the speed of Nx64kbps, given N is smaller than or equal to
128.
E3 represents the tertiary group rate of E system in the TDM system, that is,
34.368Mbps.Through the demultiplexing processes of E23 and E12, an E3
channel can be channelized into 16 E1 lines, each 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.
Interface Attributes
Table 10 1-port Channelized E3 FIC interface attributes
Panel and Interface LED
The following figure illustrates an 1-port ChannelizedE3 FIC panel.
Figure 13 1-port E3 FIC panel
The following table describes the LEDs on the card panels.
Attribute Description
Connector SMB
Connector
number
2
Interface
standard
G.703, G.704, G.751
Interface
speed
34.368Mbps
Cable E3 cable (75-ohm coaxial cable)
Operating
mode E3
CE3
Supported
service
E3 leased line