Galaxy H7920 Mobile Router User Manual Chapter 2: Installation
M80-792001-01 11
Connectors’ description:
COM: Serial port (RS-232/485), serial data port or console port.
RJ45: 10/100BaseT auto sense Ethernet interface.
DC: DC power supply interface (+5VDC, +7.5V~+24VDC optional,
check the label before power on.)
RESET: Reset button, press and hold for 5 seconds to reset the
Galaxy router back to its default factory configurations.
ANT: Antenna interface (SMA female), standard, vehicle antenna,
directional antenna optional.
Click “Start” -> “System Tools” -> “Default Setting” to reset the Galaxy router
back to its default factory configurations. If you have forgotten the login
password, press and hold RESET button for 5 seconds.
The Galaxy router will be back to the factory default configurations if the RESET
button is pressed up to 5 seconds.
Management webpage address: 192.168.8.1
Login name: admin, Password: hongdian
Interface and cable connection
COM – Serial Port
COM serial port is standard, DB9 (Female) RS-232(DCE) interface (RS-485
optional); it can be assigned to CONSOLE port or data port.
RS-232(DCE) connector PIN definition:
DB-9 connector (DCE-Female)
PIN Signal Description Direction Note
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 --
For CONSOLE mode, the PC serial port that connects the Galaxy router should be
configured to 57600, 8, N, 1; and then you can start a Hypertext Terminal at the
PC, type commands to manage Galaxy router.
Galaxy router has a feature of the dial-up backup routing. Customer can connect
a dial-up modem to the router COM port. A special cable will be required. The
detail cable wiring is showed at the below diagram.
Galaxy H7920 Mobile Router User Manual Chapter 2: Installation
M80-792001-01 12
CD 1
RX 2
TX 3
DTR 4
GND 5
DSR 6
RTS 7
CTS 8
RING 9
1 CD
2 RX
3 TX
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RING
RS-232 DB9 (Male)RS-232 DB9 (Male)
RS-232 Modem
CD 1
RX 2
TX 3
DTR 4
GND 5
DSR 6
RTS 7
CTS 8
RING 9
1 CD
2 RX
3 TX
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RING
RS-232 DB9 (Male)RS-232 DB9 (Male)
RS-232 Modem
RJ45 – Ethernet
It is standard 10/100BaseT Ethernet interface (Auto sense).
DC – Power
DC power supply interface (+5VDC, +7.5V~+24VDC optional, check the label
before power on.)
The power adapter output current should be not less 2A; Power supply ripple
should be less 300mV.
ANT - Antenna
Standard 5OΩ/SMA RF connector (Female)
For outdoor use, lightning should be considered. We propose to install an
arrester between antenna and the ANT interface.
2.4 Ground
To ensure a safe, stable and reliable Galaxy mobile router operation, DTU
cabinet should be grounded properly. Connect the Galaxy mobile router cabinet
to site ground wire.
2.5 Power Supply
Galaxy router is designed with advanced power management technologies; it
can operate standalone. The input DC power voltage is +5VDC (+7.5V~+24VDC
optional). You should check the Galaxy router label before power on.
The power adapter output current should be not less 2A; Power supply ripple
should be less 300mV.