Axesstel MV400 - Manual (Page 34)

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A. System Selection
This drop down menu lets you specify the wireless network that your
Modem will scan and seek service from. There are 4 modes for which
your Modem can operate:
• EV-DO only
• EV-DO and 1xRTT
• 1xRTT only
• Not available
Note that EV-DO allows broadband high speed (up to 3.1 Mbps) while
1xRTT only supports up to 153 kbps. The default setting of your Modem
is set by your service provider and is normally "EV-DO and 1xRTT". In
this case, your Modem will attempt to get service first in EV-DO mode. If
EV-DO is unavailable then it will automatically switch to 1xRTT. We
recommend you leave this setting as set by your service provider.
B. Disable Automatic USB Port Search
This check lets you disable the automatic COM port assignment to use
for your computer USB and COM connections with the Modem. If
selected, a drop down menu with a list of available COM ports will
appear and you will need to specify the port number from that list.