TTL serial port (TX, RX, RTS, CTS, DTR, and DSR lines).

Two additional I/O lines.

Four control lines for status LEDs.

Power: 40mA @ 5V.

Dimensions: 46x28x13mm.

Fully sealed (potted) design.

Firmware is upgradeable through the serial port or network.

Full- and half-duplex serial port modes.

Server, client, and server/client network ("routing") modes.

Numerous other options for connections, serial port, etc.

Configuration stored in the EEPROM.

Detailed status indication via external LEDs.

Setup through the serial port or network (UDP commands).

Remote control of all I/O lines including RTS, CTS, DTR, and DSR.

"On-the-fly" commands for immediate serial port configuration.

Serial-side "modem" commands for network connections control.

Direct control of ADSL modems.

Supports UDP, TCP, ARP, ICMP (ping), DHCP, PPPoE, LCP.