to get the automatic b setting use these settings
[HKEY_LOCAL_MACHINE\Software\OEM\InitProv\PhoneSett ing]
"ItemValue2"=dword:00000004
"ItemName2"="Standard"
"ItemCount"=dword:00000004
"ItemValue4"=dword:00000002
"ItemName4"="Automatic-A"
"ItemValue3"=dword:00000003
"ItemName3"="Automatic-B"
"ItemValue1"=dword:00000001
"ItemName1"="Home only"
"ServiceTitle"="Phone: Preferred Serving System"
"ServiceName"="Network Service"