The DeviceName property returns a description of the device
that the connection was established on. For example, the string
"US Robotics Sportster 28000" may be returned for a modem.
Note that this property value may change if the DeviceType
property is modified. Setting this property will change the device
used to establish the dial-up networking connection. Changes to this
property value should be made after changes to the DeviceType
property.
To enumerate a list of available devices for a given device type,
use the DeviceCount property and DeviceEntry property
array.