MyPBX U300 Administrator Guide
7
Item
Description
1
RX- Receive Data-
2
RX+ Receive Data+
3
Not used
4
TX- Transmit Data-
5
TX+ Transmit Data+
6
Not used
7
Not used
8
Not used
Note: Please follow the below steps to make RJ45 cable to connect it to the E1 port.
Step 1
: Connect MyPBX U300 E1 port to the E1 line according to the line sequence of
E1 port.
From the above table, we can see that the No.1 and No.2pins of MyPBX U300 E1 port
is for receiving data (No.1 for receiving data -, No.2 for receiving data +), while No.4
and No.5 is for transmitting data (No.4 is for transmitting data -, No.5 is for transmitting
data +).
When connected to the E1 line, RX- of E1 port should be connected to TX- of E1 line;
RX+ of E1 port should be connected to TX+ of E1 line; TX- of E1 port should be
connected to RX- of E1 line; TX+ of E1 port should be connected to RX+ of E1 line.
For example, the line sequence of the E1 line (RJ45 port) provided by the telecom
company is: No.4 for TX-, No.5 for TX+, No.7 for RX- and No.8 for RX+ which
apparently can
’t correspond to that of MyPBX U300 E1 port. So you need jumper,
which could be depicted as below:
Figure 3-1 E1 cable cord sequence
Step 2
: Connect the self-made RJ45 cable to E1 port.