3Com 3C13755-US - Router 5642 Installation Manual page 53

T3 represents the tertiary group rate of T system in the TDM system, that is,
44.736Mbps. An E3 channel can be channelized into 28 T1 lines through the
demultiplexing processes of T23 and T12, each T1 line also supporting the
operating modes of CT1. T23 is used to indicate either T2-to-T3 multiplex or
T3-to-T2 demultiplex, and T12 to indicate T1-to-T2 multiplex or T2-to-T1
demultiplex. "T23" and "T12" discussed here represent the demultiplex process.
Figure 56 1-Port Channelized E3 MIMM
Table 44
Table 45 1-Port Channelized C3 MIMM
Attribute
Connector
Number of connectors
Interface standard
Interface rate
Interface cable type
Operating mode
CE3
E3 leased line
Figure 57 1-Port Channelized C3 MIMM Panel
Table 46 1-Port Channelized C3 MIMM LEDs
LED
LINK
1-Port Channelized E3 MIMM
Description
SMB
2
G.703, G.704, G.751
34.368Mbps
E3 cable (75ohm coaxial cable)
E3
Services supported
Meaning
OFF means that the link is not set up
and ON means that the link has been
set up.
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