The EX77900 switches are designed to operate in harsh environments and can withstand temperatures from -40°C to 75°C (-40°F to 167°F). The EX77900 series is extremely well-suited for network connectivity in intelligent traffic systems and critical infrastructure installations.

Meeting the strict EMC requirements of NEMA TS2 and IEC 61850-3 standards, the switches can maintain continuous operation during voltage dips and electrical interruptions of up to 0.5 seconds as per IEC 61000-4-11. Power and network redundancy is available from the EX77900 with dual power inputs, and support for STP, RSTP, MSTP or EtherWAN's Alpha-Ring protocols. With four 10G SFP+ ports, the EX77900 can connect to a core network or form a redundant ring with ease.

The EX77900 is fully managed via RS-232, CLI, Telnet and web browser, supporting SNMP, port mirroring, QoS, flow control, VLAN, Link Aggregation, IGMP snooping, DHCP, and DDM.

Additional features of the Etherwan EX77900 include dual firmware image backups, which prevent firmware upgrade failures, and support for USB dongle for quick configuration backups.