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<concept id="GUID-9BD11817-54AC-5731-98EC-91B0C8686847" xml:lang="en"><title>What

Are Envelope Commands</title><shortdesc>This section describes the envelope commands and the functions

they provide to the client applications. </shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>The envelope commands request the TSY to package the messages related to

the SAT. The envelope commands enable the communication between the SAT application

and SAT engine. The envelope commands cannot be used to instruct the device.

This section provides some envelope commands supported by Symbian platform. </p>

<section id="GUID-BB683C95-EE1F-5F4B-B705-4521FBA2248E"><title>Envelope command

functions</title> <p>Envelope commands allow the SAT engines to: </p> <ul>

<li id="GUID-43C07EF0-DF20-5291-B5DA-7CCE502D2FA8"><p>get the SAT features

that the device supports. </p> </li>

<li id="GUID-F1A586A0-4A9E-5D39-8944-5BFE34B274A8"><p>send the menu item selected

by the user to the client applications. The menu is created by a proactive

command. </p> </li>

<li id="GUID-03E375FF-E68C-56F3-A00E-E37C8255A930"><p>notify the SAT engine

of any changes made to the earlier request by a call or a PDP context. </p> </li>

<li id="GUID-4FCA420E-4658-54A3-808B-1ABB454DE5C9"><p>notify the SAT engine

of different events in the device like idle screen, channel, connection and

browser termination. </p> </li>

<li id="GUID-DBF877CF-444A-5637-ABEE-5B41DB4BB51B"><p>notify the client applications

of new Multimedia Messages (MMS). </p> </li>

<li id="GUID-CB91DF83-E8E3-54AB-9E74-388747C52232"><p>get the unstructured

service data from the network. </p> </li>

</ul> </section>