2N NetSpeaker Manual page 87

Activate Source in Session
Enter the command to activate a source in a session. Defined by the CmdPar1
= SessionId, CmdPar2 = SourceId and CmdPar3 = FileId parameters. If the
CmdPar1 and CmdPar2 values are non-existent, the server replies OK, but no
source will be activated. If the CmDPar3 value is -1 or any non-existent value,
the source will be played from the first file in the sequence.
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Request
<msg Id="CTI_NSPK_CMD_REQ">
<CTI_NSPK_IE_SES_CMD Cmd="PLAY" CmdPar1="0x4"
CmdPar2="0x5" CmdPar3="-1"/>
<CTI_IE_REFERENCE Ref="0x420"/>
</msg>
Response
<msg Id="CTI_NSPK_CMD_CONF">
<CTI_IE_REFERENCE Ref="0x420"/>
<CTI_IE_RESULT Result="OK"/>
</msg>
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