Communications
Port
Communications
Parameter
Communicatio
ns Protocol
Function
COM2
Baud rate: 9600
bit/s, 19200 bit/s,
or 115200 bit/s
Master/slave
protocol
Southbound and
northbound
multiplexing
communication port
● Connects to a
Huawei NMS.
● Connects to
Huawei lower-
level devices.
NOTE
All these ports are protected by a security mechanism.
Figure 3-9 Pins in the COM port
Table 3-12 Pin definitions for the COM1 port
Pin
Signal
Description
1
TX+
Transmits data over RS485.
2
TX-
3
Reserved
-
4
RX+
Receives data over RS485.
5
RX-
6
PGND
Grounding (PE)
7
Reserved
-
8
Reserved
-
Table 3-13 Pin definitions for the COM2 port
Pin
Signal
Description
1
TX+
Transmits data over RS485.
ETP4860-B1A2 Embedded Power
User Manual
3 Components
Issue 04 (2021-01-05)
Copyright © Huawei Technologies Co., Ltd.
26