AT Command Reference Guide for EDGE Wireless ... - wless.ru

Chapter 10 – Internet Service Commands
10.3 AT^SISO Internet Service Open
Description:
Test Command Syntax:
Response:
Read Command Syntax:
Response:
Write Command Syntax:
Response:
Unsolicited Result Code:
The AT^SISO write command starts the Internet session configured by the service
profile. If the service open successfully, the URCs ^SISR and ^SISW will trigger the
action to follow, either writing data with AT^SISW of reading data with AT^SISR. If the
“^SISW” and “^SISR” URCs notify that no data is available at all, or that a data transfer
has been successful, the service can be closed with AT^SISC. If an error occurs after
opening or while using a service then the URC type “^SIS” described below will be
delivered.
In any case, an opened service must be finished by sending the Close command
AT^SISC. This applies no matter whether the service has been completed successfully
(all data transmitted) or entered an error state (e.g., indicated by the “^SIS” URC). It is
also necessary when a service, such as POP3 or FTP, has already closed automatically
after successful data transfer and entered “2”.
The AT^SISO read command requests the status of all Internet service profiles. One
line is issued for every Internet service profile. Information following
value “srvType” is issued only if “srvType” was given a valid value via AT^SISS. The
read command can be used any time during operation or after closing a service. In the
latter case the response indicates the state of the last event related to a specific service
profile. It will be updated only when the same service profile is used again.
AT^SISO=
OK
AT^SISO
^SISO: , value “srvType” [, , ,
, , , ]
OK
AT^SISO=
OK
ERROR
+CME ERROR:
Indicates the current state of the Internet service.
^SIS: , [, [][, ]]
The URC may appear if an error occurs, for example after opening an Internet service
with AT^SISO or any time during operation. The URC also indicates a request for a
mobile terminated Internet service client connection, or a failure if a mobile terminated
request is rejected. Furthermore, the URC may deliver an information element resulting
from a specific command given in the service profile.
The precise related to a varies greatly depending on the used
service, the scenario and the implementation of the remote server. A list of possible
causes can be found in Section 10.7, Info. Elements Related to Internet Service URCs.
Parameter Descriptions:
0 ... 9 specified with AT^SISS.
Internet service state identifier.
“” Service profile is unused.
2 Service profile resources are allocated; i.e., at least the service type has been set
(parameter , value “srvType” of AT^SISS). The service is not opened.
3 Connecting: State after opening a service with AT^SISO where the connection is being
established.
If connection setup is successful the service proceeds to the state “4” (Connected) and
one of the URCs “^SISW” and “^SISR” may follow. If connection setup is not successful,
the “^SIS” may appear.
In the case of SMTP, the service will not enter =3 until the host has written
the first data packet with AT^SISW.
If the service profile is configured as Socket listener, then the listener always stays at
=3 (listening) and =3 (LISTENER), while the and
of the dynamically assigned service profile may change. See examples
in Section 10.3.1.
4 Connected: Socket connection valid.
5 Closing: Socket connection releasing. The Closing state is reached after sending the
AT^SISC command or after a service has closed automatically, such as FTP download
or POP3. In the latter case, it is necessary to send the AT^SISC command even though
the FTP download or POP3 service has already entered “2”.
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 134