RE: [Bluez-users] Bluetooth Voice Setting

["Khaled" <khaled@ipbill.com>]

Hi Marcel

> > Can someone tell me how to set the bluetooth voice settings
> when using sco
> > and what to set it to?
> > My hcidump shows voice setting as (0x03|0x0025) - what does
> this mean? Also,
> > the hcidump shows that a connection is created for DM* and DH*
> packet types:
> > for sco, should this not be HV* packet types?
>
> you don't need to worry about it. The packet types and the voice setting
> are not related (from the HCI viewpoint). If you wanna know details
> about it, look at the HCI part of the Bluetooth specification. The value
> is a bitmask and it is explained in detail there.
>

I was curious because I am not getting any sound through my machine
(configured as a headset - 0x200404 device class).
Also there are no service classes defined when I do hciconfig -a (as shown
below).
Although a headset icon appears on my 6310i and I get no sound at the actual
mobile phone (because the headset is connected), I still cannot hear or say
anything that can be heard from my computer.
Therefore, I am trying to study the hcidump output but its almost impossible
to interpret.

I have hcidump output, which I can send should you wish to view it.

hciconfig -a:

hci0:   Type: USB
        BD Address: 00:09:DD:10:29:78 ACL MTU: 192:8 SCO MTU: 64:8
        UP RUNNING PSCAN ISCAN
        RX bytes:45230 acl:1413 sco:0 events:2002 errors:0
        TX bytes:27314 acl:1440 sco:0 commands:243 errors:0
        Features: 0xff 0xff 0x0f 0x00 0x00 0x00 0x00 0x00
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'BlueZ (0)'
        Class: 0x200404
        Service Classes:
        Device Class: Audio/Video, Device conforms to the Headset profile
        HCI Ver: 1.1 (0x1) HCI Rev: 0x175 LMP Ver: 1.1 (0x1) LMP Subver:
0x175
        Manufacturer: Cambridge Silicon Radio (10)

hci0:   Type: USB
        BD Address: 00:09:DD:10:29:78 ACL MTU: 192:8 SCO MTU: 64:8
        HCI 14.7
        Chip version: BlueCore02-External (ES2)
        Max key size: 56 bit
        SCO mapping:  HCI

sdptool browse local:

Browsing FF:FF:FF:00:00:00 ...
Service Name: Voice Gateway
Service RecHandle: 0x10000
Service Class ID List:
  "Handfree Audio Gateway" (0x111f)
  "Generic Audio" (0x1203)
Protocol Descriptor List:
  "L2CAP" (0x0100)
  "RFCOMM" (0x0003)
    Channel: 5
Profile Descriptor List:
  "Handfree Audio Gateway" (0x111f)
    Version: 0x0100

Service Name: Voice Gateway
Service RecHandle: 0x10001
Service Class ID List:
  "Handfree Audio Gateway" (0x111f)
  "Generic Audio" (0x1203)
Protocol Descriptor List:
  "L2CAP" (0x0100)
  "RFCOMM" (0x0003)
    Channel: 6
Profile Descriptor List:
  "Handsfree" (0x111e)
    Version: 0x0100

sdptool search --bdaddr 00:0E:6D:34:BD:B1 0x111f:

Class 0x111F
Searching for 0x111f on 00:0E:6D:34:BD:B1 ...
Service Name: Voice Gateway
Service RecHandle: 0x10005
Service Class ID List:
  "Handfree Audio Gateway" (0x111f)
  "Generic Audio" (0x1203)
Protocol Descriptor List:
  "L2CAP" (0x0100)
  "RFCOMM" (0x0003)
    Channel: 13
Language Base Attr List:
  code_ISO639: 0x656e
  encoding:    0x6a
  base_offset: 0x100
Profile Descriptor List:
  "Handsfree" (0x111e)
    Version: 0x0100

I have set the channel to be used as channel 13 given the above search
result; this connects the phone to the headset.

Kind Regards.

Khaled



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