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Appendix A: Introduction of Cable making
Figure A.1 RJ45 connector Pin Definition (from upper side)
E1 Cable Making
• 75ohm BNC Interface:
Suggest using SYV75-5, SYV75-3 and SYV 75-2-2 coaxial cable. The longest distance is less than 200 meters.
Take BNC connector out from accessories and screw off protecting sheath. Split the core and shielded layer of
coaxial cable and then put protecting sheath onto cable. Firmly weld core of cable and core of BNC connector, and
firmly weld shielded layer of coaxial cable and shell of BNC connector. At last fix the protecting sheath at the end of the
connector.
• 120 ohm RJ45 Interface:
Table A.1 RJ 45 E1 Interface Line Definition
Pin No. 1 2 3 4 5 6 7 8
Definition OUT+ OUT- NC IN+ IN- NC NC NC
A.2 Cable of Ethernet
This device has Auto MDI/MDIX function so the Ethernet cable can use straight-through or
cross-over twisted pair line.
Table A.2 Ethernet Interface line definition
Pin NO. 1 2 3 4 5 6 7 8
MDI Definition TX+ TX- RX+ NC NC RX- NC NC
MDIX Definition RX+ RX- TX+ NC NC TX- NC NC
Use Cat 5 twisted pair to connect the equipment. Please ensure that the twisted pair is less than 100
meters. The line definition of RJ45 connector is shown in figure A.1.
Making straight-through cable the two ends should both comply with T568A or T568B standard at
the same time. Making cross-over cable the two ends comply with T568A and T568B separately. The
T568A and T568B line standard are shown in table A.3.
Table A.3 the T568A and T568B Line Standard
Line No.
STD
1 2 3 4 5 6 7 8
T568A White Green White Blue White Orange White Palm