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Q-Lite Satellite Modem Installation and Operating Handbook
8-1
Chapter 8 Remote Control Protocol
The modem supports the following remote control interfaces:
•
A built-in remote web user interface that provides web pages from the modem (using
a web server) to a web browser. This is accessed by entering the IP address of the
modem into a web browser address bar (the web server being on port 80).
•
A serial interface (selectable between RS232 and RS485) that can be used to send
and receive Paradise Universal Protocol (PUP) messages. This interface can be
driven either through a generic user-entry application such as HyperTerminal (in the
case of RS232) or through an application that uses a driver developed specifically to
implement the PUP protocol. In the case of RS485, a message wrapper (defined in
the document
‘Remote M&C Specification for Q-Lite™ Satellite Modem’ ) is used to
encapsulate PUP commands and responses, which are incorporated into the
message payload.
•
An Ethernet interface that can be used to send and receive PUP messages or Simple
Network Management Protocol (SNMP) messages. This interface can be used in
several ways.
Firstly, a generic user-entry application such as Telnet can be used to automatically
send or manually enter PUP commands.
Secondly, PUP messages can be encapsulated directly into TCP packets using the
message format defined in the document
‘Remote M&C Specification for Q-Lite™
Satellite Modem’ . These must be sent to a specific TCP port that the modem listens
on for PUP commands. Typically this will result in much faster communications than
when using Telnet. This method is referred to as ‘direct encapsulation’ elsewhere in
this document to differentiate it from the Telnet type of communications.
Thirdly, SNMP V1 or V2c can be used to communicate between an SNMP network
manager and the SNMP agent on the modem.
The remote control protocol for the modem is specified in the document ‘ Remote
M&C Specification for Q Series Satellite Modems ’.
M&C message example
The following example shows how to:
1) get the transmit power from a modem. (The response has a value of -25. Note that
numeric text denotes the message contents as hexadecimal characters.)
g e t T I F T x I F P w r *
02 15 01 09 67 65 74 20 54 49 46 54 78 49 46 50 77 72 2A 0B 03
- 2 5 *
02 0A 01 09 2D 32 35 2A C8 03