From BitLevel Technology:
This program is a demo application for BitLevelTrace software library (with full C source code) that allows a calling user application to convert raw communication protocol data into a fully decoded readable trace text. Decoded protocols include LAPD (Q.921), LAPF (Q.922), ISDN call control (Q.931), X.25, 802.3 Ethernet and IP (IP, TCP, UDP, ICMP). Also decodes nested protocols: X.25 over LAPF; Q.931 over LAPD; TCP, UDP & ICMP over IP over 802.3
