At^sico Internet Connection Open - Multi-Tech MultiModem EDGE Reference Manual

10.9 AT^SICO Internet Connection Open

The AT^SICO write command opens a connection profile (also referred to as bearer). Unlike the
Description:
AT^SISO command, which starts a connection profile and the service profile bound to it, AT^SICO
activates only the selected connection profile. Another difference over AT^SISO is that AT^SICO
disables the inactivity timeout of the selected connection profile and, therefore, sets the "inactTO"
value to -1 (see also AT^SICS). To release the connection use the close command AT^SICC.
Closing the bearer restores the previously set "inactTO" value of the concerned connection profile.
The AT^SICO command may be used, for example, to keep a bearer open while no service is
active (i.e. while no service has been opened with AT^SISO). Also, the AT^SICO command is
necessary for running the Ping command AT^SISX when no service has been opened with
AT^SISO.
A connection opened with AT^SICO remains open until closed with AT^SICC or, in case of
inactivity, disconnected by the network after 25 hours usually. The network initiated disconnection
can be avoided by sending AT^SISX at regular intervals (Ping). The Round Trip Time (RTT) of the
AT^SISX command strongly depends on the data traffic of the IP services or DUN connections
used at the same time.
Please note that after sending the AT^SICO write command the AT channel is blocked until the
connection is established. The command may be aborted when receiving any character during
execution, e.g. "AT" or "at".
The AT^SICO read command requests the current settings of all Internet connection profiles set
with AT^SISC. The output is identical with the read command response of AT^SISC. One line is
issued for every possible parameter of a given <conParmTag> value.
Test Command Syntax:
Response:
Read Command Syntax:
Response:
Write Command Syntax:
Response:
Parameter Description:
<conProfileId>
0...5 Internet connection profile identifier defined with parameter <conProfileId> of AT^SICS.
<conParmTag>
Internet connection profile identifier defined with parameter <conParmTag> of AT^SICS. See parameter
description of AT^SICS.
<conParmValue>
Internet connection parameter set with <conParmValue> of AT^SICS. See parameter description of AT^SICS.
Note:
Be sure not to mix up the start and close commands for connection profiles and service profiles. It is allowed to
use only the combinations AT^SICO / AT^SICC or AT^SISO / AT^SISC.
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G)
AT^SICO=?
[^SICO:(list of defined <conProfileId>s)]
OK
AT^SICO?
[^SICO: <conProfileId>, <conParmTag>, <conParmValue>]
[^SICO: ...]
OK
AT^SICO=<conProfileId>
OK
ERROR
+CME ERROR: <err>
Chapter 10 – Internet Service Commands
154