Specifications

Windows Embedded Automotive 7 Deep Dive: Phone Core and Media Core 34
occur before defaulting back to the local ringtone. When this registry setting is not present, the
default value is 3. See Table 2 for more information about these settings.
Table 10 and Table 11 show the Windows Embedded Automotive 7 settings and the relationship
between phone behavior and the resulting ring.
Table 10: Ring behavior
Windows Embedded
Automotive 7 Settings
Phone Behavior
Result Ring
Local Ring
A2DP Ring
SCO Ring
No Ring
Local
Local
Local
In-band, HQRT Disable
A2DP Ring
SCO Ring
No Ring
Local
SCO
Local
In-Band
A2DP Ring
SCO Ring
No Ring
A2DP
SCO
Local
In-band, Media Core playing other
stereo source
A2DP Ring
SCO Ring
No Ring
A2DP
SCO
Local
In-band, Media Core playing other
A2DP source
A2DP Ring
SCO Ring
No Ring
Local
SCO
Local
Table 11: Ring behavior
Windows Embedded
Automotive 7 Multi-Zone
Settings
Phone Behavior
Result Ring
In-band, Phone A2DP in front,
other source in rear
A2DP Ring
SCO Ring
No Ring
A2DP front
SCO
Local
In-band, other source in front,
phone A2DP in rear
A2DP Ring
SCO Ring
No Ring
A2DP F/R
SCO
Local
Phone GetLastError
The phone GetLastError feature is useful in tracking phone HFP errors in deployed Windows
Embedded Automotive 7 systems. OEMs can access the errors through a web service or local
application, and then report the errors to the phone manufacturer. Alternative implementations
include utilizing a USB memory stick to which error messages can be copied, or providing a
graphical user interface (GUI) that displays a code that the user can provide to a customer
support representative.