the modem to the Internet. Dial-up Networking uses the 3G Modem port described
below to make this connection. The ports and their common uses are explained below.
The Modem port is labelled Huawei Mobile Connect – 3G Modem. It is used for
general purpose control and monitoring of the modem. You can send AT commands,
receive unsolicited messages, and establish a connection on this port. To find the actual
port number go to the Control Panel and click on Phone and Modem and select the
Modem tab. The modem will be installed as a Huawei Mobile Connect Modem and the
com port number will be listed next to the modem.
The port labelled Huawei Mobile Connect – 3G Network Card port is an ECM
(Ethernet Control Model) port and is used when you want to send Ethernet over USB.
For more information about creating ECM connections, please see the Huawei MU609
Application Guide. This guide is available from www.zoomtel.com/4575support
. To find
the USB port number for this port, go to Device Manager and look at Network
Adapters.
The port labelled Huawei Mobile Connect – 3G PCUI port is used to send AT
commands to the modem. This port can be used to control the modem using AT
commands and to monitor the status of the modem when using the ECM port. To find the
USB port number for this port, go to Device Manager and look at Ports.
The port labelled Huawei Mobile Connect – Control Interface is used for GPS AT
command interaction as well as receiving positioning data back from the modem. If you
want to receive NMEA positioning data, use the Huawei Mobile Connect – 3G GPS
Interface port. The 3G GPS Interface port only reports data, and no AT commands are
accepted. For more information about using the modem’s built-in GPS features, please
see Chapter 5 - Using GPS
. The USB port numbers for these two ports are listed in
Device Manager under Ports.
The port labelled Huawei Mobile Connect – 3G Application port is reserved.
You may connect to multiple ports at once depending on your application. For example if
you are using the GPS functionality of the modem, you may be receiving this data on the
Control Interface and 3G GPS Interface ports. You may then be reporting this data
back to a server over either the 3G Modem or 3G Network Card ports.
• To learn how to establish a data connection using either your application’s
protocol stack or the modem’s built-in IP stack, refer to Chapter 4 – Establishing a
Data Connection.
• To learn how to use your modem with SMS messaging, refer to Chapter 5 –
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