GE MDS entraNET 900, Техническое руководство

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05-4055A01, Rev. E MDS entraNET Technical Manual 9
NOTE:
Detailed information on the DNP3 protocol is available on the
DNP Users’ Group Web site at
www.dnp.org .
1.3.4 Upgrading an Older Wireless Network with
Serial Interfaces
Millions of wireless data products have been sold in the last two decades
for licensed and license-free operation, many of them manufactured by
GE MDS. There are several ways that these systems can benefit from
employing MDS entraNET wireless equipment, including flexible serial
and Ethernet interfaces, higher data throughput, and ease of installation.
MDS entraNET radios are well suited to replace leased lines, dial-up
lines, or existing data radios by taking advantage of the built-in serial
and Ethernet interfaces on the transceiver. The sections below discuss
two common scenarios.
Replacing Legacy Wireless Products
In most cases, legacy radio transceivers supporting serial interface
equipment can be replaced with MDS entraNET radios with little or no
special configuration. This equipment can be connected to MDS
entraNET radios through the
COM1
or
COM2
port with a DB-25 to RJ-45
cable wired for EIA-232 signaling. The
COM2
port supports standard
EIA-232 signaling and acts as a data communications equipment ( DCE )
device.
NOTE:
Several previous GE MDS-brand products contained signal
lines on their interface connectors that are not used or required
on entraNET radios. Consult the equipment manual(s) for
interface pinout information, and connect
only the required
pins.
Supplementing a Legacy Wireless Network with IP Services
MDS entraNET Remotes support most polled protocols. The serial
interfaces encapsulate serial data in two different modes: connectionless
(
User Datagram Protocol , or UDP) and connection-oriented
( Transmission Control Protocol , or TCP).
For complete details on serial gateway interface modes, see
“CONFIGURING THE SERIAL INTERFACES” on Page 54 .
1.3.5 P22 Protected Network (Redundant)
Configuration
For mission-critical applications, GE MDS offers the Protected Network
Station. This radio incorporates two entraNET AP transceivers, two
power supplies, and a switchover logic board that automatically selects
between Transceiver A and Transceiver B as the active radio.
Figure 1-4