Siemens Brodersen MC55 AT - Manual (Page 241)

MC55_ATC_V04.00 Page 241 of 475 3/17/06
Confidential / Released
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 =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 =6 after
counter has reached 0.
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.
Number of bytes received via
AT^SISR
since last successful
AT^SISO
write command.
Number of bytes sent via
AT^SISW
since last successful
AT^SISO
write command.
Recently used local IP address in dotted-four-byte format and TCP port, separated by colon, e.g.
"192.60.10.10:80".
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 =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 =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
.
(num)
(num)
(num)
(str)
(str)