DVK-BTM521 Laird Technologies, DVK-BTM521 Datasheet - Page 74

• Manufacturer Part Number: DVK-BTM521
• Description: BT MM DEV KIT
• Manufacturer: Laird Technologies
• Type: Transceiver, Bluetoothr

Specifications of DVK-BTM521

• Frequency: 2.4GHz
• Interface Type: RS-232
• Processor Series: BTM521
• Silicon Manufacturer: Laird Technologies
• Kit Application Type: Communication & Networking
• Application Sub Type: Bluetooth
• Kit Contents: Development Board & Software Tools
• Features: Supports CSR
• Rohs Compliant: Yes
• For Use With/related Products: BTM521
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: DVK-BTM521

BTM520/521
Bluetooth
AT COMMAND SET
REFERENCE
74 www.lairdtech.com
®
Multimedia Plus Module
7.2.14 HFG – Call Waiting Notification (“+CCWA…”, #11_4.21, #12_4.22.1)
7.2.15 HFG status
7.2.16 HFG Call Records
Call waiting notification is a mandatory feature for the HFG and is therefore supported
on the BTM510/511. If call waiting notification was enabled by the HF (#11_4.21) and
when a call is waiting (incoming call whilst call is active), the call waiting notification
“+CCWA…” and the appropriate call setup indicator ““+CIEV: callsetup=1” are sent
automatically as specified in section 4.22.1 of the HFP specification [5].
ATI66
Returns the status of the HFG instance:
0 = not connected
1 = SLC connected
2 = Audio connected
3 = In call, SLC connected
4 = In call, audio connected
5 = In call setup (incoming/dialling/alerting), SLC connected
6 = In call setup (incoming/dialling/alerting), audio connected
8 = In call, no SLC
The HFG maintains call records for all calls. Even when no HF is attached to the HFG (no
SLC existing), the HFG needs to be aware of all ongoing calls in order to send the correct
HFP indicators as soon as an HF connects.
Also, it is mandatory for the HFG to respond to a current call list request, issued by the
HF (AT+CLCC, #21a_4.31.1). The HFG queries its internal list of current calls and replies
automatically to AT+CLCC.
The list of current calls is displayed to the host by AT+HFGC?. The state of a call record is
changed by AT commands beginning with “AT+HFGC...” .
AT+HFGC?
List all current calls.
Response for each call record (if existing, verbose mode controlled by S354):
<cr,lf>[<idx>],<dir>,<call_status>,<call_mode>,<fmultiparty>,
”<number_string>”,<number_type>
With:
idx : unique index of call, 1 digit
dir : 0 (‘>’) for outgoing, 1 (‘<’) for incoming call
call_status :
call_mode :
fmultiparty :
number_string : calling or called line identification presentation string, refer to section 7.2.5.
number_type : number type for CLIP, refer to section 7.2.5.
0 = active
1 = held
2 = dialling (outgoing)
3 = alerting (outgoing)
4 = incoming (incoming and ringing)
5 = waiting (incoming and waiting whilst another call is active)
0 = voice
1 = data
2 = fax
0 = call is point to point (‘p’)
1 = call is part of multiparty (‘m’)
Laird Technologies