How to set pin in peering bluetooth devices?

I try to connect to GPRS through my bluetooth adapter. All works good, /dev/rfcomm0 device is created successfully. hcitool show details of my phone.

When I try to connect to Internet, PC tries to peer with my phone. Phone asks me to enter the pin code. After I finish entering pin code (pressing OK on phone), kinternet immediately writes

May 14 09:47:36 hostname pppd[16414]: Failed to open /dev/rfcomm0: Connection refused

Nobody asked me about the pin code on the PC side! Only phone asked.

Question 1: where am I to enter the default pin code on my PC?
Question 2: what is the default pin code to enter in phone?