Specifications

Windows Embedded Automotive 7 Deep Dive: Phone Core and Media Core 31
Status
Action
Behavior
+CLCC Support
Conference call
Regular terminate
No calls
N/A
One call active
Second call incoming
Regular terminate
One call active
Second call rejected
N/A
One call active
Second call on hold
Regular terminate
Second call active
N/A
One call on hold
Regular Terminate
No calls
N/A
Conference call with x and
y number of calls
Terminate call y
Call x active
Call y terminated
+CLCC required
One call active
Second call on hold
Terminate second call
First call active
+CLCC required
Incoming call
Ignore call
Call ringing stops on head unit. Call
eventually goes to voice mail
N/A
One call active
Second call on hold
Place active call on
hold
Two held calls not allowed
N/A
One call active
Second call on hold
Mute active call
First call active but muted
Second call on hold
N/A
Active Call Handling
When a call is active, Automotive 7 displays the call information, as defined by the HMI
specifications, to the user. An active call can have the following options made available through
the UI:
 Privacy: This mode transfers the SCO audio to the phone handset. The call is still
handled by Automotive 7. Turning this mode off transfers the audio back to the
Automotive 7 device.
 Hold: This function places the active call on hold using the HFP_HOLD command, which
is part of the standard Bluetooth command set. If the user places an active call or calls
on hold using the handset, Automotive 7 indicates the hold status. An active call can be
placed on hold when a new call is placed or a second call is accepted by the user.
 Join: This function gives the user the capability to join two calls to create a conference
call. This function is allowed only when one call is on hold and the other call is active.
The user may only join calls that are connected and cannot join a call that is incoming.
Conference Calling
Users can control two active simultaneous calls using this feature, and join the two calls into a
conference call. Windows Embedded Automotive 7 only supports conference calling on phones
that support the AT+CLCC and AT+CHLD mode 3.
If one of the calls is terminated or lost while in a conference call, Automotive 7 automatically
reverts to a single active call state.
Call Termination
Automotive 7 provides the following call termination functionality: