2005 - Ip Telephony Deploying Voiceoverip Protocols (Hardcover) ISBN-13: 9780470023594 ISBN-10: 0470023597 Genres: Computers & Technology, Engineering & Transportation ? 2005 - Beyond Voip Protocols Understanding Voice Technology and Networking Techniques for Ip Telephony (Hardcover) ISBN-13: 9780470023624 ISBN-10: 0470023627 Genres: Computers & Technology, Science & Math, Engineering & Transportation ? |