HP 6000 Router Series Instrukcja Instalacji Pobierz pdf (Strona 72)

72 CHAPTER 7: FLEXIBLE INTERFACE CARDS

75ohm unbalanced transmission mode and uses a pair of 75-ohm unbalanced

coaxial cables to connect the peer device.

Figure 14 E3/T3 cable

Connect Interface Cable

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.

BNC connector SMB connectorBNC connector SMB connector

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HP 6000 Router Series Instrukcja Instalacji Strona 72