Digi ConnectPort X4 User's Guide Page 108

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Configuration through the web interface
108
GSM cellular modem advanced settings
Mobile Band Settings: Select the mobile service frequency bands to be configured in
the modem. The default selection Automatic should be used unless there is a reason to
configure specific bands only.
Note: The mobile PPP connection is not automatically restarted when a band selection
is configured.
Automatic: Enables automatic service band selection by the modem.
2G Only:
3G Only:
Manual: Selects the individual service bands to be configured. Improper selection or
combinations may result in a failure to establish a mobile connection. Select one or
more of these values: 850 MHz, 900 MHz, 1800 MHz, 1900 MHz.
Mobile Carrier Settings: Mobile carrier selection allows the mobile device to be
configured to use a specific mobile service only. The recommended and normal
operation is for the mobile device to automatically find service with an available carrier.
However, a manual selection can be configured to force the use of a particular carrier.
Please be aware that use of a manual carrier selection can result in a significantly longer
time interval for the unit to find service on the specified network. Both the mobile
network and the mobile device (modem) may influence this behavior. Therefore it is
recommended that the Automatic selection be used wherever possible.
Warning: The scan for available carriers requires that the mobile PPP connection be
terminated to perform the scan. A successful scan cannot be performed and completed if
it is initiated over the mobile connection, since the scan procedure requires user
interaction that is not possible after the mobile PPP connection has been terminated.
Automatic: Enables automatic selection of a carrier for the mobile service connection.
The mobile PPP connection is not automatically restarted if automatic carrier selection
is configured.
Manual: Enables manual selection of the Network ID of a carrier for the mobile service
connection. The carrier selection is the concatenation of the Mobile Country Code
(MCC) and Mobile Network Code (MNC) value for a carrier. The MCC is always a
three-digit decimal value, and the MNC is either a two- or three-digit decimal value. A
properly entered Network ID is composed of five or six decimal digits, with no other
characters in that value.
The Scan available carriers... link initiates a wizard that instructs the modem to
scan for available carriers and display a list from which the desired carrier may be
selected. The scan may take as little as 20 seconds or up to two minutes to complete.
Scanning for carriers requires that the mobile PPP connection be terminated so the
scan may be performed. Upon completion of the wizard, the mobile PPP connection
is restarted using the selected carrier.
Note: If the Mobile Band Settings selection in use by the modem is other than
Automatic, the list of carriers returned by the scan may include only a subset of the
carriers available in the area.
The Network ID from a carrier selection from the list can be manually entered.
However, the mobile PPP connection is not automatically restarted if the manual
entry method is used.
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