Westermo MRD-3x0 - Manual (Page 174)

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7.6 DNP3 IP-Serial Gateway
7.6.1 Description
The DNP3 IP-Serial Gateway carries out translation between
DNP3 Serial and DNP3 TCP protocols. This has several advan-
tages:
DNP3 frames are not fragmented. The translation soft- •
ware identifies and transmits DNP3 link layer frames
without fragmentation, ensuring reliable transport of the
DNP3 data in a single TCP or UDP packet.
Sever serial port emulation is not required. The SCADA •
server can communicate with the DNP3 device directly
via TCP rather than through serial port emulation soft-
ware. This reduces the complexity and number of soft-
ware layers required on the SCADA servers.
Dual function endpoint. The remote station can return •
unsolicited messages, DNP3 serial data to the SCADA
server.