User manual

H7921-RHZ-i 3G Router User Manual
17
3.2.2.2 LAN connection method
When it is required to connect Galaxy H7921-RHZ-i 3G Router to local network through
HUB or switch, connect the hub or switch out-link port with any one of its switch ports
as shown in the figure below.
Fig. 3.2.2.2: Wiring Method 2
3.2.2.3 Serial port connect
 COM – serial interface
COM serial communication interface is a standard RS-232(DCE) interface
with DB9 terminal (negative terminal). It can be used for the configured
console (CONSOLE) or normal communication interface.
The cables of RS-232(DCE) interface are defined as follows:
DB-9 connector (DCE-negative terminal)
PIN
Name
Description
Direction
of signal
Remark
s
1
CD
Carrier Detect
--
2
RXD
Received Data
--
3
TXD
Transmitted Data
--
4
DTR
Data Terminal Ready
--
5
GND
Signal Ground
6
DSR
Data Set Ready
--
7
RTS
Request To Send
--
8
CTS
Clear To Send
--
9
RI
Ring Indicator
--
 RJ-45 – Ethernet Interface