1. ITU Recommendation G.711. Pulse Code Modulation of Voice Frequencies, 1988.
2. ITU Recommendation G.114. One-way transmission time, March 1993.
4. ITU Recommendation G.726. 40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation, March 1991.
5. ITU Recommendation G.727. 5-,4-,3- and 2 bits Sample Embedded Adaptive Differential Pulse Code Modulation, November 1994.
6. ITU Recommendation G.728. Coding of Speech at 16 kbit/s Using Low-Delay Code Excited Linear Prediction, November 1994.
7. ITU Recommendation G.729. Coding of Speech at 8kbit/s using Conjugate Structure - Algebraic Code Excited Linear Predictive Coding, March 1996.
8. ITU Recommendation G.764. Voice packetization - Packetized voice protocols, December 1990.
9. ITU Recommendation H.225.0. Call signalling protocols and media stream packetization for packet-based multimedia communication systems, February 1998.
10. ITU Recommendation H.245. Control protocol for multimedia communication, March 1996.
12. ITU Recommendation Q.931. ISDN user-network interface layer 3 specification for basic call control, March 1993.
13. ITU Recommendation T.30. Terminal Equipment and protocol for Telematic Service/Procedure for Facsimile General Switch Networks, March 1993.
14. RFC 2212, "Specification of Guaranteed Quality of Service", September 1997.
15. RFC 1789, "INETPhone: Telephone Services and Servers on Internet," April 1995.
16. RFC 2205,"Resource Reservation Protocol (RSVP) - Version 1 Functional Specification", September 1997.
17. RFC 1889, "RTP: A Transport Protocol for Real-Time Applications", January 1996.
18. FRF.11. Voice over Frame Relay Implementation Agreement, May 1997.
19. FRF.1.1. Frame Relay User-to-Network Implementation Agreement, January 1996.
20. FRF.3.1. Multiprotocol Encapsulation Implementation Agreement, June 22 1995.
21. IMTC Voice over IP Forum Service Interoperability Implementation Agreement 1.0, December 1997.
23. Voice over Packet Tutorial, http://www.telogy.com/our_product/golden_gateway/ VOPwhite.html.
24. Voice/Fax Over Frame Relay vs. Voice/Fax Over IP, A Memotec Communications White Paper, May 1998.
25. Давид Ворсано. Кодирование речи в цифровой телефонии // Сети и системы связи. - 1996. - N1. - C.84-87.
26. Корнышев Ю.Н., Пшеничников А.П., Харкевич А.Д. Теория телетрафика. - М.: Радио и связь, 1996. - 270 с.
27. Дмитрий Ганьжа. Простой протокол управления сетью // LAN. - 1998. - N5. - C.21-23.
28. Анита Карве. Качество услуг для трафика реального времени // LAN. - 1999. - N3. - C.38-41.