Digital telephony
Bellamy, John C.
Digital telephony - 3rd ed. - New Delhi: Wiley India, 2011 - xxv, 643p.
9788126509294
Electronics
621.385 / BEL
Digital telephony - 3rd ed. - New Delhi: Wiley India, 2011 - xxv, 643p.
9788126509294
Electronics
621.385 / BEL