Set Tmin and Tmax for inquiry?

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Hi

I'm developing an application for bluecasting. So period of periodic inquire is important for me. AFAIK, inquire process takes 10.24 seconds (Bluetooth 2.0). But if I use StartDiscovery method in python script, then I see this in hcidump:

< HCI Command: Periodic Inquiry Mode (0x01|0x0003) plen 9
  max 24 min 16 lap 0x9e8b33 len 8 num 0

and I get "Inquiry Complete" event every ~24-30 second. But if I use 'hcitool spinq', then I see:

< HCI Command: Periodic Inquiry Mode (0x01|0x0003) plen 9
  max 24 min 16 lap 0x9e8b33 len 8 num 0

and "Inquiry Complete" event takes place every ~13-15 seconds. And in both cases all remote devices is being founded, so I don't see any reason for longer inquiring. AFAIK HCID internally sets Tmin and Tmax parameters, but is there any way to affect to its 'decision'?

P.S. Excuse me for my English :(
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