CTC Union ETU01-Plus, User Manual

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Chapter 2. Installation
18
E1 Line
BNC coax connector
Two BNC coax connectors marked TX and RX.
RJ-45 Connector
The pin assignments for the RJ-45 connector are as follows:
Pin: Function:
4
TTIP (Transmit data out)
5 TRING (Transmit data out)
1 RTIP (Receive data in)
2 RRING (Receive data in)
Cable and Termination
Use a shielded twisted pair cable between the ETU01-Plus and the DTE device.
The receivers on the ETU01-Plus are 100 Ohm terminated. If problems are
encountered with the connection to the V.35 DTE interface, make sure that the DTE
interface is terminated correctly.
2.5 DIP Switches
2.5.1 Caution
To avoid accidental electric shock, disconnect the ETU01-Plus power cord before
opening the cover. Access inside the equipment is only permitted to authorized and
qualified service personnel.
2.5.2 Procedure
1. Turn power OFF.
2. Disconnect all interface connections and the power cord from the AC outlet.
3. Loosen the screws at the left/right of the rear panel.
4. Remove the PCB.
5. Adjust the DIP switches as required, according to the tables in Appendix A.
6. Replace the PCB and tighten the screws.
7. Return all interface and power connections.
8. Turn power ON.