28x Ports, Gigabit Ethernet, L3, 5900g

Features and Benefits
- IPv6 Ready logo awarded (IPv6 Logo Committee certified);
- IEEE 1588 PTP (Precision Time Protocol) for precise time synchronization of networks;
- DHCP Option 82 for IP address assignment with different policies;
- Modbus/TCP industrial Ethernet protocol supported;
- Turbo Ring, Turbo Chain, and IEEE 802.1D-2004 RSTP/STP;
- IGMP snooping and GMRP for filtering multicast traffic from industrial Ethernet protocols;
- IEEE 802.3ad, LACP for optimum bandwidth utilization;
- Bandwidth management prevents unpredictable network status;
- Lock port to restrict access to authorized MAC addresses;
- Multi-port mirroring for online debugging;
- Automatic warning by exception through email, relay output;
- Automatic recovery of connected devices' IP addresses;
- Line-swap fast recovery;
- Configurable by web browser, Telnet/serial console, Windows utility, and ABC-01 automatic backup configurator;
- Works with MXview industrial network management software.

Cyber-security Features
- User passwords with multiple levels of security protect against unauthorized configuration;
- SSH/HTTPS is used to encrypt passwords and data;
- Lock switch ports with 802.1x port-based network access control so that only authorized clients can access the port;
- Disable one or more ports to block network traffic;
- 802.1Q VLAN allows you to logically partition traffic transmitted between selected switch ports;
- Secure switch ports so that only specific devices and/or MAC addresses can access the ports;
- Radius/TACACS+ allows you to manage passwords from a central location (available in Q1 Y2011);
- SNMPv3 provides encrypted authentication and access security.

Introduction
The PowerTrans PT-7728 is designed to meet the demands of power substation automation systems (IEC 61850-3, IEEE 1613), traffic control systems (NEMA TS2), and railway applications (EN50155/EN50121-4). The PT-7728's Gigabit and fast Ethernet backbone, redundant ring, and 24/48 VDC or 110/220 VDC/VAC dual isolated redundant power supplies increase the reliability of your communications and save on cabling/wiring costs.

The modular design of the PT-7728 also makes network planning easy, and allows greater flexibility by letting you install up to 4 Gigabit ports and 24 fast Ethernet ports. Along with the optional front or rear wiring, these features together make the PT-7728 suitable for a variety of industrial applications.

Description
IEC 61850-3 modular managed rackmount Ethernet switch system with 3 slots for fast Ethernet modules, and 1 slot for Gigabit Ethernet modules, for a total of up to 24+4G ports, cabling on rear panel, 2 isolated power supplies (24 VDC and 88-300 VDC or 85-264 VAC), -40 to 85ﾟC operating temperature.