Voice Over Data Networks: Covering IP and Frame Relay by Held, Gilbert

Voice Over Data Networks: Covering IP and Frame Relay (Computer

Frame Relay Networking by Gilbert Held (1999, Hardcover)

Cisco Voice over Frame Relay, ATM, and IP by Foy, Stephen Paperback / softback

Delivering Voice Over IP Networks by Minoli, Daniel; Minoli, Emma

Delivering Voice Over IP Networks by Daniel Minoli: Used

Voice Over IP Networks by Marcus Goncalves (1998, Trade Paperback)

SHRINK-WRAPPED NEW: Reorganizing Data and Voice Networks 2005 HC ISBN 1596930403