ISDN: Concepts, facilities, and services
Kessler, Gary C
ISDN: Concepts, facilities, and services - New York: McGraw-Hill Inc, 1990 - xvi, 302p.
0-07-034242-3
ISDN
ISDN services
D 681.324:621.39 / N0
ISDN: Concepts, facilities, and services - New York: McGraw-Hill Inc, 1990 - xvi, 302p.
0-07-034242-3
ISDN
ISDN services
D 681.324:621.39 / N0