Users Manual

MDS 05-6399A01, Rev. G MDS™ Master Station 21

3.6 Data Interface Connections

Ethernet Data Interface (RJ-45)

The Ethernet interface supports both radio management and payload data transport functions.

For radio management, connecting via a web browser provides enhanced functionality and ease-

of-use over serial/USB methods. Web-based management is the preferred and primary means of

accessing the transceiver through the built-in Device Manager.

SSH may also be used on this connector, and provides the same CLI based user interface availa-

ble via the serial/USB interfaces.

See section Ethernet Interfaces on Page 102 for electrical information and connector pinout.

Serial Data Interfaces

COM1 and COM2 provided on the front of the Platform Manager module serve as the serial inter-

face ports for payload data, radio management, or diagnostics. Management is also available

through the mini USB port. The default factory configuration for these serial ports depend on the

type of radio modules that are installed.

Table

. Default

Serial Port Assignment

Product variant

COM1

COM2

MPRS Serial Payload Data System Console

MPRL System Console System Console

These ports are user-configurable for specific applications. The procedures for changing their de-

fault operation are provided later in this guide.

Not all PCs have a serial port. If one is not available, a USB-to-Serial adapter and appropriate

driver software may be used to provide serial connectivity. These adapters are available from

several manufacturers, including GE MDS.

MPRS Serial Data Connection

When used as a data port for an SD Radio Module in Transparent or x710 modes, some pins on

COM1 and COM2 have special behavior determined by configuration. DCD (Data Carrier De-

tect) is asserted when the radio received an on-frequency signal. RTS (Request-to-Send) can be

configured to key the transmitter when asserted. CTS (Clear-to-Send) can be configured to go

“high” after the programmed CTS delay time has elapsed (DCE), or can be configured to key an-

other connected radio when RF data arrives (CTS KEY)

The included Com Port Adapter Cable 73-2434A25 can be used to convert the unit’s RJ-45 serial

jack to a DB-9F type connector.