SMU01C
User Manual
2 Panel and Ports
Issue 03 (2015-01-05)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
6
Communication Ports
Table 2-3
Communications port description
Communications
Ports
Specifications
Protocol Compliance
COM
Supports RS485 and RS232 ports,
with baud rates 9600 bit/s and 19200
bit/s respectively.
YDN protocol/Huawei
master slave protocol
RS485/RS232
NOTE:
The COM ports and RS485/RS232 ports work in active/standby mode. Either of them is at
work.
The RS485 and RS232 serial ports are mutually exclusive.
Figure 2-2
Pins of the RJ45 port
Table 2-4
COM or RS485/RS232 port pin definition
Pin
Signal
Description
1
TX+
Sends data over RS485.
2
TX-
4
RX+
Receives data over RS485.
5
RX-
3
RX232
Receives data over RS232.
7
TX232
Sends data over RS232.
6
PGND
Ground
8
-
-