Specifications

CUSTOMATCOMMANDS

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227 HSPA+ATCommandsReferenceGuide

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Examples

NextcommandopensasocketlisteningforTCPonport3500without.

AT#SL=1,1,3500

Notes

 Ifsuccessful,thecomman d returnsafinalresultcod eOK.

 IftheListenAutoRspflaghasnotbeensetthroughthecommandAT#SCFGEXT(forthespecificconnId),then,

whenaTCPconnectionrequestcomesontheinputport,ifthesenderisnotfilteredbyinternalfirewall(see

#FRWL),anURCisreceived:

+SRING:<connId>

Youmustuse#SAcommandtoa

ccepttheconnectionor#SHcommandtorefuseit.

 IftheListenAutoRSPflagissetwhenaTCPconnectionrequestisreceivedonthelocallistening port,the

connectionisautomaticallyacceptedaslongastheIPaddressofthedeviceoriginatingtheconnectionhasbeen

definedintheinternalfirwewall(see#FRWL.)OnceacceptedtheCONNECT indicationisgivenandth

emodem

goesintoonlinedatamode.

 Whenclosingthelisteningsocketyoudonotneedtospecifythe<listenPort> value.

SocketListenUDP#SLUDP

ThiscommandopensorclosesasocketlisteningforanincomingUDPconnectiononaspeci fiedport. 

ReadcommandreturnsalltheactuallisteningUDPsockets.

Testcommandreturnstherangeofsupportedvaluesforallthesubparameters.

Syntax

Command Commandtype

AT#SLUDP=<connId>,<listenState>,<listenPort>

AT#SLUDP? Read

AT#SLUDP=? Test

ParametersandValues

<connId> Socketconnectionidentifier.

1‐6 

<listenState> 

0 Closessocketlistening.

1 Startssocketlistening.