1. D. M. Cerni, “The CCITT: Organization, U.S. Participant, and Studies Toward the ISDN,” NT1A Report 82–101.
2. J. Telecommunications Networks, vol. 3, no. 1, pp. 47–56, Spring 1984.
3. H. Vaughn, “Research Model for Time-Separation Integrated Communications,” Bell Syst. Tech. J., vol. 38, no. 4, pp. 909–932, July 1959.
4. P. Fritz, “Citedis Production PCM Public Telephone Switching System,” IEEE Trans. Commun., vol. COM-22(4), pp. 1264–1268, September 1974.
5. International Telegraph and Telephone Consultative Committee (CCITT) Integrated Services Digital Network (SDN), Recommendations of the Series I, Vol. III, ASC. III. 5, VIIIth Plenary Assembly, June 1984.