The RB493AH has nine ethernet ports and three miniPCI slots, it also has a switch chip, so the ethernet ports of your choice can be grouped together to make it act as a switch.
The heart of this device is a new generation high performance Atheros CPU, much faster than the one found on the regular RB493.
RB493AH includes RouterOS - the operating system, which will turn this powerful system into a highly sophisticated router/firewall or bandwidth manager.
One small device - with all the power of RouterOS.
CPU Atheros AR7161 680MHz
Memory 128MB DDR SDRAM onboard memory
Boot loader RouterBOOT
Data storage 64MB onboard NAND memory chip
Ethernet Nine 10/100 Mbit/s Fast Ethernet ports with Auto-MDI/X
miniPCI Three miniPCI slots
Extras Reset switch, Beeper
Serial port One DB9 RS232C asynchronous serial port
LEDs Power, NAND activity, 5 user LEDs
Power options Power over Ethernet: 10..28V DC (except power over
datalines). Power jack: 10..28V DC
Dimensions 105mm x 160mm, 189 grams
Power consumption ~3W without extension cards, maximum – 16 W
Operating System MikroTik RouterOS v3, Level5 license