Understanding data communications /
Held, Gilbert.
Understanding data communications / By Gilbert Held. - 7th ed. - New Delhi : Pearson Education , 2003. - xv,765p. ; PB 24 cm.
8129702118
Messages and transmission channels
Asynchronous modems and interfaces
Synchronous modems digital transmission and service units
004.65 / HELG
Understanding data communications / By Gilbert Held. - 7th ed. - New Delhi : Pearson Education , 2003. - xv,765p. ; PB 24 cm.
8129702118
Messages and transmission channels
Asynchronous modems and interfaces
Synchronous modems digital transmission and service units
004.65 / HELG