The major features of the Mediatrix 4400 digital VoIP gateway include:
- 1, 2 or 4 standard ISDN BRI interface ports
- Up to 8 simultaneous calls
- User programmable call handling
- SIP open standards
- HTTP, SNMP, FTP and TFTP for configuration and management
- Fax over IP support, including T.38
- fax bypass, and modem bypass capabilities
- call-switching and user programmable call routing
- Multiple codec support
- Multiple LEDs for status indication at a glance