Multi-Tech MultiModem EDGE Reference Manual page 146

<srvState>
Internet service state.
Please note, that the state of an Internet service may influence the state of the serial DCD line. For details see
description of value 2 for parameter <value> of command AT&C.
2
3
4
5
6
<socketState>
Socket state identifier.
1
2
3
4
<rxCount>
Number of bytes received via AT^SISR since last successful AT^SISO write command.
<txCount>
Number of bytes sent via AT^SISW since last successful AT^SISO write command.
<locAddr>
Recently used local IP address in dotted-four-byte format and TCP port, separated by colon; e.g.,
"192.60.10.10:80".
<remAddr>
Remote IP address in dotted-four-byte format and TCP port, separated by colon; e.g., "192.60.10.10:80".
Notes:
•
If the bearer cannot be established and AT^SISO returns an error there might be a general GSM/GPRS
problem. To identify the reason you can take advantage of the AT+CEER command. Using AT+CEER is
especially recommended when the <infoID> parameter of the AT^SISE command equals 0.
• If a service or network error occurs during an IP session and the "^SIS" URC or the AT^SISE command
display an error message, the service enters <srvState>=5 and then 6, i.e. the IP connection is closed. In this
case, the service still allows reading the data stored in the buffer, but writing data is denied. After reading,
close the service and open it again.
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G)
Allocated. Service profile resources are allocated; i.e., at least the service type has
been set (parameter <srvParmTag>, value "srvType" of AT^SISS). The service is not
opened, but ready for configuration.
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" (Up) and one of
the URCs "^SISW" and "^SISR" may follow. If connection setup is not successful, the
"^SIS" URC may appear and the service enters <srvState> 6 (Down).
In the case of FTP, <srvState>=3 means that the command channel is being
established.
If the service profile is configured as Socket listener, then the listener always stays at
<srvState>=3 and <socketState>=3 (LISTENER), while the <srvState> and
<socketState> of the dynamically assigned service profile may change. See examples
in Section 10.5.1.
Up
The service performs its purpose. The data transfer process is the major function at this
state.
FTP: Data channel is up.
SMTP: The SMTP service will not enter <srvState>=4 until the host has written the first
data packet with AT^SISW.
Closing
Internet Service is closing the network connection.
FTP: Command channel is released.
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 (see note below on service or
network errors).
If a service in this state be sure to close it with AT^SISC before reopening it.
Socket not assigned; i.e., no TCP/UDP connection active.
Socket assigned as CLIENT.
Socket assigned as LISTENER.
Socket assigned as SERVER.
Chapter 10 – Internet Service Commands
146