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1-port Channelized T3 1CT3 (3C13889) 73
Connect Interface Cable
CAUTION: Some measures have been taken to protect 1-port Channelized E3 FIC.
To achieve better lightning protection effects, however, you are recommended to
add a special lightning arrester at the input end of the E3/T3 cable if it is led
outdoors.
1 Connect the SMB connector of an E3/T3 cable to the Tx port of 1-port E3 FIC and
another end to the Rx port of the peer equipment.
2 Connect the SMB connector of another E3/T3 cable to the Rx port of 1-port E3 FIC
and another end to the Tx port of the peer equipment.
3 Power on the Router, and check the status of the LINK LED on the 1-port E3 FIC
panel. An OFF LED means that the line has failed and the signal has not been
synchronized. Check the line in this case.
1-port Channelized T3
1CT3 (3C13889)
The main functions of 1-port Channelized T3 FIC include:
■ Working in T3 mode, the card can transmit/receive and process the fast traffic
of one T3 channel, as well as provide the accessing of T3 traffic.
■ Working in CT3 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.
T3 represents the tertiary group rate of T system in the TDM system, that is,
44.736Mbps.Through the demultiplexing processes of T23 and T12A, a T3
channel can be channelized into 28 T1 lines, each also supporting the operating
mode 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.
Interface Attributes
Table 12 1-port T3 interface attributes
Attribute Description
Connector SMB
Connector
number
2
Interface
standard
G.703, G.704, G.752
Interface
speed
44.736Mbps
Cable T3 cable (75-ohm coaxial cable)
Operating
mode
T3
CT3
Supported
service
T3 leased line