Linux bluez stack - RFCOMM

$ hcitool inq
 Inquiring ...
        00:90:4B:2A:9D:9D       clock offset: 0x219e    class: 0x001f00
$ hcitool scan
 Scanning ...
        00:90:4B:2A:9D:9D       xxxxxxxxxx

Binding of RFCOMM devices as root:

$ sudo rfcomm bind 0 00:90:4B:2A:9D:9D 1

Now use /dev/rfcomm0 like any other terminal device.