Appendix A Introduction Of Cable Making; E1 Cable; Computer Serial Cable Making - Raisecom RC801 User Manual

7. Appendix A Introduction of Cable Making

A.1 E1 Cable
75 Ohm BNC connector:
SYV 75-5, SYV 75-3, or SYV 75-2-2 coax cable£ ¬ the distance shall not be longer than
200m.
First pick out the BNC connector from the accessories, and release the tail protecting jack.
Secondly, separate the core from the shield, and put the tail protecting jack on it. Solder the
strand with the core of the BNC connector. Solder the cable shield with the shield of the
BNC connector. Finally, fix the jack at the end of the connector.
120 Ohm RJ45 connector:
It is suggested that connect with unshielded twisted pair
RJ45 connector (BALANCE), 1 to 8 pin from left to right be defined as following:
1——OUT£ «
2——OUT£ -
5——IN£ «
6——IN£ -
Others——GPND
A.2 Computer Serial Cable Making
Computer serial port LNK-UP adopts RJ45 connector. The definition of pins:
3 ——RXD 232 signal input
7 ——TXD 232 signal output
4, 8 ——GND
Others——hang on
The sequence of the cable for connection between LNK-UP port (RJ45) and computer
serial port (DB9 female connector) is as follows.
output£ «
output£ -
input£ «
input£ -
RJ45
3
7
4, 8
DB9F
←— 3
—→ 2
—— 5
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