Siemens MC55 AT manual SocketStatenum, LocAddrstr, RemAddrstr

4	Up
	The service performs its purpose. The data transfer process is the major func-
	tion at this state.
	FTP: Data channel is up.
	SMTP: The SMTP service will not enter <srvState>=4 until the host has writ-
	ten the first data packet with AT^SISW.
5	Closing
	Internet Service is closing the network connection.
	FTP: Command channel is released.
6	Down
	This state is entered if
	- the service has successfully finished its session (see note on Socket),
	- the remote peer has reset the connection or
	- the IP connection has been closed because of an error.
	If a service in this state be sure to close it with AT^SISC before reopening it.
	Additional note for Socket: The Socket service enters <srvState>=6 after
	<unackData> counter has reached 0.
<socketState>(num)
Socket state identifier.
1	Socket not assigned, i.e. no TCP/UDP connection active.
2	Socket assigned as CLIENT.
3	Socket assigned as LISTENER.
4	Socket assigned as SERVER.

<rxCount>(num)

Number of bytes received via AT^SISR since last successful AT^SISO write command.

<txCount>(num)

Number of bytes sent via AT^SISW since last successful AT^SISO write command.

<locAddr>(str)

Recently used local IP address in dotted-four-byte format and TCP port, separated by colon, e.g. "192.60.10.10:80".

<remAddr>(str)

Remote IP address in dotted-four-byte format and TCP port, separated by colon, e.g. "192.60.10.10:80".

Note

•As in polling mode no error URCs are available you are advised to integrate the commands AT^SISI and AT^SISE into the command sequences for upload and download jobs. So, the AT^SISO command may be followed by AT^SISI to check that the service has entered the <srvState>=4 before sending AT^SISR or AT^SISW. This helps you to detect errors even though the "^SIS" URCs are disabled. A typical example is that the service fails to be opened because the service profile contains a wrong destination address. In such a case, after opening with AT^SISO and OK response, the service quickly enters the states <srvState>=2, 4 and 6, with an error being returned no earlier than after sending the first AT^SISR or AT^SISW command. In URC mode, an error URC, such as "Host not found" would be received in this situation, but in polling mode the only way to detect the state is using AT^SISI or, alternatively, AT^SISO.

MC55_ATC_V04.00	Page 241 of 475	3/17/06
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