ISDN
STALLINGS, William
ISDN An introduction - NEW YORK MACMILLAN PUBLICATION 1989 - 420
002946028X
COMPUTER COMMUNICATION - PROTOCOL
004.62 / STA-M9
ISDN An introduction - NEW YORK MACMILLAN PUBLICATION 1989 - 420
002946028X
COMPUTER COMMUNICATION - PROTOCOL
004.62 / STA-M9