can't upload code to arduino network

Hy! I have arduino network. Arduino network does not have usb port. How i can upload code to arduino? Has that arduino bootloader by default? I have Prolific usb-to-serial cable. Do I need to using max323 on that cable? Which pins need I connect?

tnx...

I think the normal way would be to use an FTDI-USB cable or board.

I connected pins by the following table:

usb_to_serial arduino
GND(5) GND
DTR(4) RESET
TXD(3) RX
RXD(2) TX

And I conected power with adapter 9V 300mA.

Driver for my usb to serial is corect (image usb.png). In arduino software I chose "Arduino Ethernet" (tools->board). Next I chose COM8 (tools->serial port). Then I tried upload program on arduino but I get that message "avrdude: stk500_getsync(): not in sync: resp=0x00"! Program is also corect beacuse I chose sketch from file->examples->basic->blink...

please help to me...

usb.png

If that is a USB to RS232 cable, then you will need some sort of level converter, I believe.