[closed] How to get imformation used in dissector FP over udp/ip?

I am using Wireshark version 1.6.4. I have some FP packets in pcap format. Please tell me how can I decode packets as FP. Those sample fp packets are transported over UDP. In the function "dissector_fp()",it have some preference come from ATM/DCT2000,but in UDP/IP,there is no such information pass to fp level. how can I get this information(used to decode the fp and above level,exmple:channel_type,is_uplink)?

Thanks and regards,