pc as headset

Hi all,

I'm trying to use my pc as an headset, first of all I changed the class of device, so I have:

hciconfig -a
hci0: Type: USB

        BD Address: 00:23:4D:E6:C4:61 ACL MTU: 1021:8 SCO MTU: 64:8
        UP RUNNING PSCAN ISCAN
        RX bytes:7370 acl:37 sco:0 events:187 errors:0
        TX bytes:3628 acl:26 sco:0 commands:128 errors:0
        Features: 0xff 0xff 0x8f 0xfe 0x9b 0xff 0x79 0x83
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'e6500-0'
        Class: 0x200404
        Service Classes: Audio
        Device Class: Audio/Video, Device conforms to the Headset profile
        HCI Ver: 2.1 (0x4) HCI Rev: 0x51c8 LMP Ver: 2.1 (0x4) LMP Subver: 

0x423d
Manufacturer: Broadcom Corporation (15)

even from another pc hcitool scan --class confirm that the class of my pc is headset

I registered the HS service, "sdptool browse local" find the headset service:

Service Name: Headset
Service RecHandle: 0x10007
Service Class ID List:
"Headset" (0x1108)
"Generic Audio" (0x1203)
Protocol Descriptor List:
"L2CAP" (0x0100)
"RFCOMM" (0x0003)
Channel: 5
Profile Descriptor List:
"Headset" (0x1108)

    Version: 0x0100

and I can see this service from another pc too,

but other device no yet identify my pc as an headset,

I have a phone that only discover headset devices, it finds commercial headsets but not my pc, what missing?

thanks for your help,

Nicola