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3.4
Modem Remote Communications (Radyne Link Level Protocol)
The Remote Port on J3 allows for control and monitoring of parameters and functions via an
RS-232 Serial Interface, or RS-485 for RLLP Protocol.
Enter Equipment Remote Mode setup from the Web Browser interface, System menu. First, set
the Remote Port Control to Remote, then set the Multidrop Address as necessary, then set the
Remote Interface to RS232 or RS485.
Control and status messages are conveyed between the modem and all subsidiary modems, and
the host computer, using packetized message blocks in accordance with a proprietary
communications specification. This communication is handled by the RLLP, which serves as a
protocol wrapper for the RM&C data.
3.4.1 RLLP Protocol Structure
The Communications Specification (COMMSPEC) defines the interaction of computer resident
M&C software used in satellite earth station equipment such as modems, redundancy switches,
multiplexers and other ancillary support gear. Communication is bi-directional, and is typically
established on one or more full-duplex, 9600-baud, multi-drop control buses that conform to EIA
Standard RS-485.
Each piece of earth station equipment on a control bus has a unique physical address, which is
assigned during station setup/configuration, or prior to shipment. Valid decimal addresses on one
control bus range from 032 through 255, for a total of up to 224 devices per bus. Address 255 of
each control bus is usually reserved for the M&C computer.
See MN-DMDREMOTEOP, the Remote Protocol Manual (TM117) for the RLLP Protocol.
3.5
Modem Setup for Ethernet M&C (J11)
This port is dedicated for Ethernet Communications supporting SNMP, FTP and Web Browser to
the DMD1050TS base modem, and Secure HTTP (HTTPS) independently to the FIPs module.
The port is configured for 100 Base-T communications protocols. The Ethernet M&C interface
uses a standard RJ45 Male connector. The Ethernet Interface is shipped from the factory in an
addressable BOOT MODE state, that allows you to get access to the unit. This BOOT MODE
state is set to IP TEST.
Connect an Ethernet cable between the unit and a computer that has web browser capability.
Open the browser, and enter the default web address for the unit.
3.6
M&C Default/Reset Plug Settings (JP1 & JP2)
If you are having difficulty getting access to the Web Browser or the Terminal Interface, reset the
M&C interface settings. Do this by putting the supplied jumper/shunts, CNRSHUNT, on both the
JP1 and JP2 connectors, across pins 1 and 2. Power cycle the modem. See Chapter 4 and
Appendix D for details.
The default reset procedure resets these M&C items:
•
TCP-IP BOOT MODE is set to IP TEST, (modem address 192.168.0.238)
•
Remote Control Mode is set to Terminal
•
Terminal port is set to RS232
•
Web Browser Names and Passwords are reset, (See the Web Browser Setup Guide,
Appendix D)
Once default settings have been activated, remove the Jumpers.
Theory of Operation
DMD1050TS Satellite Modem Board
3–11
Revision 1
MN-DMD1050TS
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