The ST unit (Switching and Tunneling) is the equipment of Media Switch family specifically designed to act as an ATC Router, performing switching and tunneling functions between serial ports and/or Ethernet ports.

Manage up to 24 serial ports (synchronous or asynchronous) and up to 12 independent Ethernet ports
Operate with different serial protocols (HDLC, HDLC LAP-B, AIRCAT500, TVT2, CD2, etc.)
Integrate advanced remote control functions by FTP, WEB server, SNMP or proprietary NMS

Up to 24 high-speed WAN ports;
Up to 12 10/100 Base-T Ethernet ports;
Up to 6 independent sections:
- 4 high-speed WAN ports,- 2 Ethernet ports;
SNMP protocol;
Serial Data Synchronization,
matching more serial lines, each one with its own characteristics:
- Protocols (HDLC, HDLC LAP-B, AIRCAT 500, TVT2, CD2, etc.),
- Electrical standards
(V.24, V.36, etc),
- Baud rate
(from 300 to 115200),
- Timings (also using internal clock);
User-configurable packets filtering, to remove or re-direct packets on more ports;
Multiplex features, remoting serial ports and making long distance connections by Ethernet or Fiber;
Integration with legacy systems;
Link Quality analyzer;