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MULTISOCKET AT COMMANDS

133 AT Commands for EV-DO-EV3 Modems

Parameters and Values

<connID> Socket connection identifier.

1-6

Socket Listen #SL

Execute command opens/closes a socket listening for an incoming connection on a specified port.

Read command returns all the actual listening sockets.

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

Syntax

Command Command type

AT#SL=<connID>,<listenState>,<listenPort>>[,<lingerT>] Execute

AT#SL? Read

AT#SL=? Test

Parameters and Values

<connID> Socket connection identifier.

1-6

0 Closes socket listening.

1 Starts socket listening.

<listenPort> Local listening port.

1-65535

<lingerT> Linger time.

0 Local host closes immediately when remote host has closed. Default: 0.

255 Local host closes after an escape sequence (+++).

Notes

 If successful, the command returns a final result code OK. When there is an incoming connection on the

local port and if the sender is not filtered by internal firewall (see #FRWL), a URC is received:

+SRING : <connID>

The command #SCFGEXT doesn’t influence the presentation format of the URC SRING.

Afterwards, use #SA to accept the connection of #SH to refuse it.

If the socket is closed by the network the follow URC is received:

+SL:ABORTED

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

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Multitech CDMA Guía de usuario Pagina 133