here is something written about SCO link cap.

sudo hciconfig hci0 features
hci0:   Type: USB
         BD Address: 00:0A:3A:65:83:84 ACL MTU: 377:10 SCO MTU: 16:0
         Features: 0xff 0xfe 0x0d 0x38 0x08 0x08 0x00 0x00
                 <3-slot packets> <5-slot packets> <encryption> <slot 
offset>
                 <timing accuracy> <role switch> <hold mode> <sniff mode>
                 <RSSI> <channel quality> <SCO link> <HV2 packets>
                 <HV3 packets> <u-law log> <A-law log> <CVSD> <power 
control>
                 <transparent SCO> <enhanced iscan> <interlaced iscan>
                 <interlaced pscan> <AFH cap. slave> <AFH cap. master>


regards
roland lezuo