Huawei AR550-8FE-D-H - Page 742

Figure 6-69 Structure of an asynchronous serial cable
Pos.1
Pos.13
X1
X2
X3
Pos.25
Pos.14
18
Pos.1Pos.6
Pos.9 Pos.5
D-type connector
(25-pin, male)
D-type connector
(9-pin, male)
Network port connector
(8-pin, RJ-45)
Label
Table 6-109 lists the pin assignments of an asynchronous serial cable.
Table 6-109 Pin assignments of an asynchronous serial cable
X2 (RJ45)
Signal Direction X1 (DB25) X3 (DB9)
1 RTS → 4 7
2 DTR → 20 4
3 TXD → 2 3
4 DCD ← 8 1
5 GND - 7 5
6 RXD ← 3 2
7 DSR ← 6 6
8 CTS ← 5 8
Self-made Cable: Connecting to a Serial Port Server
Figure 6-70 shows the structure of a self-made cable.
Huawei
AR500&AR510&AR531&AR550&1500&AR2500
Industrial Switch Routers
Hardware Description
6 Cables
Issue 10 (2019-03-06) Copyright © Huawei Technologies Co., Ltd. 731