Understanding the 3G Wireless Modem Interface

You configure two types of interfaces for 3G wireless modem connectivity—the physical interface and a logical dialer interface.

The physical interface for the 3G wireless modem uses the name cl-0/0/8. This interface is automatically created when a 3G wireless modem is installed in the device.

You configure the following for the physical interface:

• A dialer pool to which the physical interface belongs and the priority of the interface in the pool. A physical interface can belong to more than one dialer pool. The dialer pool priority has a range from 1 to 255, with 1 designating the lowest-priority interfaces and 255 designating the highest-priority interfaces.
• Modem initialization string (optional). These strings begin with AT and execute Hayes modem commands that specify modem operation.
• GSM profile for establishing a data call with a GSM cellular network. For more information, see Understanding the GSM Profile.

By default, the modem allows access to networks other than the home network.

Related Topics

• 3G Wireless Modem Configuration Overview
• Understanding the Dialer Interface
• Understanding the GSM Profile