are sending data. It can be either an IP address or a web address. Both UDP and TCP
are sending data over the same ports with 5005 being the remote port and 5010 being
the local port.
If the connection is already open, the modem will respond as follows:
+CME ERROR: The link has been established already
Now that the connections are open, we can send data with the AT^IPSEND command.
To send data over the UDP port opened in the example above, enter the following
command:
AT^IPSEND=1,”UDP data to be sent”
Here 1 is the Link ID set up with the IPOPEN command and “UDP data to be sent” is
the data. If the data is transmitted successfully, the modem responds with:
^IPSEND: 1
To send data over the TCP port opened in the example above, enter the following
command:
AT^IPSEND=2,”TCP data to be sent”
Here 2 is the Link ID set up with the IPOPEN command and “TCP data to be sent” is
the data. If the data is transmitted successfully, the modem responds with:
^IPSEND: 1
For more information about the AT^IPOPEN and AT^IPSEND commands, please refer
to the Huawei AT Command manual available at www.zoomtel.com/4575support
.
Connecting with ECM Dialing
ECM dialing is the way to send Ethernet data over the USB port, either through the USB
port or the modem’s header. To send the data, you first connect to the modem’s PCUI
port to send the AT commands, then you connect to the modem’s ECM port to send
data. These connections were described in chapter 3
. To set up the connection, send
the following command through the PCUI port:
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