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7. Appendix Introduction of Cable Making
A.1 E1 interface
75ohm adopting DB37 coax adapter:
Suggest using SYV 75-2-2 coax cable, the distance less than 200 meter.
120ohm DB37 male connector is defined as following:
DB37 pin
definition
OUT
IN
Others hang up. Twisted pairs can be jointing on DB37 female connector.
A.2 Cable of Ethernet
Use RJ45 Cat. 5 twisted-pair cable to connect the equipment. The cable shall not be longer
than 100 meters.
Both straight-through and crossover cables will work.
RJ45 line order as following:
Pin
1
number
Definition
TX+
A.3 RS232 cable of data channel
Adopting RJ45 connector, definition of pins as following:
3
——RXD 232 signal input
6
——TXD 232 signal output
4, 5 ——GND
others —— hang up (unassigned)
RS232 (RJ45) connection to console of computer (DB9 female connector) line order:
st
1
3、4
21、22
Pin 1
2
3
TX-
RX+
Not Used
RJ45
3
nd
2
7、8
11、12
25、26
29、30
Pin 8
4
5
6
Not Used
RX-
DB9F
←—
3
19
Raisecom Technology Co., Ltd
rd
th
3
4
15、16
33、34
7
8
Not Used Not Used
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