Specifications
Windows Embedded Automotive 7 Deep Dive: Phone Core and Media Core 56
HKEY_LOCAL_MACHINE\Comm\BTPAN1\Parms
Key
Description
ServiceID
Specifies the global service identifier as a standard globally unique identifier (GUID)
string.
SIM Access Profile
Windows Embedded Automotive 7 provides support for SAP, a Bluetooth profile that makes the
account information on a Bluetooth-enabled phone available for use by the phone module
integrated into the Automotive 7–based device. The Windows Embedded Automotive SAP
manager service takes advantage of the phone functionality that is provided by Phone Core and
the Bluetooth Pairing Core and gives applications the ability to use SAP connections.
In Automotive 7, the embedded automotive device functions as an SAP client and connects to a
Bluetooth-enabled phone (which functions as an SAP server) over an SAP profile connection.
When this connection occurs, both devices enter SAP mode. The Automotive 7–based device
then uses the account information that is provided by the SIM module to make calls from the
Automotive 7 phone module.
The advantages of using SAP include:
Improved reception using the antenna that is built into the car’s phone module.
No need to hard code or manually enter account information in the car’s phone
module to use an existing mobile phone account.
Reduced driver distraction because the user does not interact directly with the
Bluetooth-enabled phone used as an SAP server. Driver attentiveness can also be
improved by the integration of microphones and speakers into the car, together
with AEC/NS.
The disadvantages of using SAP include:
• The user’s phone UI is locked when in SAP mode, and information on that phone is
unavailable. This helps prevent driver distraction, but may dissatisfy some users.
• All SMS messages received when SAP is connected are stored on the phone module
integrated with the Automotive 7–based device. There is no widely used mechanism
for transferring these messages back to the phone.
• No phone data that would normally be accessed using HFP AT commands is
available in SAP mode.