A list of Sniff messages. Each one corresponds to a call Id.
This code was contributed by Tim Bardzil <firstname.lastname@example.org>.
This code was completed as part of a class project in TLEN 5843
Singaling Protocols, taught by Professor Douglas C. Sicker, Ph.D. at
the University of Colorado, Boulder.
Minor modifications to the code were made by M. Ranganathan .
- Tim Bardzil <email@example.com>