What E1 cables does AR1200 use

E1 cables used by AR routers and the line orders of the cables are described as follows:

E1 cables include DB9-BNC cables and RJ45-BNC cables. The impedance of the cables can be 75 ohms, 120 ohms, and 100 ohms.

Note: You are not advised to make E1 cables by yourself.
1. DB9-BNC cables: (apply to E1 cards with one interface or two interfaces)
DB9 pin1---Rx+Signal---BNC1 core wire (Rx)
DB9 pin2---Rx-Signal---BNC1 insulated wire (GND)
DB9 pin6---Tx+Signal---BNC1 core wire (Tx)
DB9 pin7---Tx-Signal---BNC1 insulated wire (GND)

2. RJ45-BNC cables: (apply to E1 cards with four and eight interfaces)
RJ45 pin1---Rx-Signal---BNC1 core wire (Rx)
RJ45 pin2---Rx+Signal---BNC1 insulated wire (GND)
RJ45 pin4---Tx-Signal---BNC1 core wire (Tx)
RJ45 pin5---Tx+Signal---BNC1 insulated wire (GND)

3. Pin definition:
Assume that a DB9 connector is put in a method that the wider end is at the top, Pin 1 to Pin 9 of the connector are defined in a sequence from left to right and from top to bottom.
Assume that an RJ45 connector is laid flat, Pin 1 to Pin 8 of the RJ45 connector are defined in a sequence from left to right when you face to the front of the connector.

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