Interfacing with Paradox Spectra Security Systems

Hi
I have SP6000 Paradox. I use the babyware software and I have a simple usb-ttl converter to communicate.

Byte 8: zone status. If==0 zone is closed if==1 zone is opened
Byte 9: zone number
Byte 10: partition of the current zone.
I made a program, and I can see the status of the zones on PC. I tryed to monitor the serial port to know what the other bytes mean, but it's difficult. I would like to manage all the functions of the system. Arm, disarm, alarm, troubles atc....