SHAPING THE FUTURE OF SATELLITE COMMUNICATIONS
5.5.1.1 RMCP over Ethernet
You can send RMCP commands to the demodulator using the Ethernet interface.
The commands are sent as data in a TCP/IP stream. The used socket number is
5933.
The RMCP protocol is similar to the RMCP protocol used for the serial interface.
The difference is that the receiving device ignores the RMCP address of the device
(that is present in an RMCP command).
The Ethernet interface needs to be configured.
We refer to the following menu:
EL170/970/470 >> Unit >> Setup >> Ethernet settings
Figure 32- Ethernet Settings
5.5.1.2 Protocol
The control unit sends a “request” message to a device identified by its unique
address. The addressed device interprets the message, performs the requested
action and sends a “response” message back.
The receiving device rejects all messages with transmission errors without any
further action. Transmission errors are:
• No stop bit;
• Parity error;
• LRC-error; (Longitudinal Redundancy Check)
• Message receive buffer overflow.
The addressed device responds to all correct formatted messages – except for
some special system messages – with an acknowledge message. Only in a few
restricted cases does the device does not respond to a request from the control
unit. This is, for example, the case when a general device reset is requested.
Correctly received messages which the device cannot handle are refused via a no-
acknowledge “error” message. This message contains the reason why the
message is rejected.
A device never sends messages on its own initiative. It only responds to a request
from the control unit. The total transmit time of a complete message may not
exceed 250ms. If the message is not completed within this time, it is discarded.
5.5.2 Simple Network Management Protocol (SNMP)
The Newtec MIB allows full monitor and control of the device using any graphical
MIB browser. We have a full proprietary MIB, which contains all the OIDs needed
to control the device.
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