RouterBOARD 450/G Series User's Manual
default, can be disabled in this menu (it will still reset the boot loader settings).
Software Reset
It is possible to reset all software configuration by short-circuiting the reset-hole during the power-up (see
ROS reset in layout diagram). No confirmation or passwords will be asked, so use with caution. This feature
can be disabled in the “system routerboard settings” menu by switching the “enable-jumper-reset”
parameter to “no”.
Appendix
Connector Index
J301 RS232C male DB9 serial port
1
4
6
Connected together
2 RxD (Receive Data)
3 TxD (Transmit Data)
5 GND
7
8
Connected together
J505 RJ45 Fast Ethernet 100Base-TX port LAN1 with passive PoE extension (next to serial
connector)
J501-
J504
RJ45 Fast Ethernet 100Base-TX port LAN3 (no PoE)
J801/
J803
Power jack (12..28 V DC, positive contact is the central pin)
Button Index
S301 Bootloader Reset button. Loads the Backup boot loader
Jumper Index
RESET Software Reset jumper hole. Resets RouterOS settings.
Ethernet Cables
Note: When using the MikroTik Gigabit PoE injector, PoE is passed on pins 4,5 (+) and 7,8 (-).When using
other PoE injectors, power can be passed on any other pins, depending on PoE injector model.
RJ45
Pin
Color Function
(100Mbit)
Function
(1Gbit)
RJ45 pin for Straight cable
(MDI, EIA/TIA568A)
RJ45 pin for Crossover cable
(MDI-X, EIA/TIA568B)
1 Green TX+ Data Data A+ 1 3
2 Green/White TX- Data Data A- 2 6
3 Orange RX+ Data Data B+ 3 1
4 Blue - Data C+ 4 4
5 Blue/White - Data C- 5 5
6 Orange/White RX- Data Data B- 6 2
7 Brown - Data D+ 7 7
8 Brown/White - Data D- 8 8
9
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