Cisco Catalyst 2000 Configuration Handbook page 283

262 Cisco LAN Switching Configuration Handbook
Lovell, David. Cisco IP Telephony. Cisco Press, ISBN 1-58705-050-1.
Inline Power
IEEE P802.3af DTE Power via MDI: http://www.ieee802.org/3/af/index.html
Voice Protocols
Session Initiation Protocol (SIP), RFC 2543: http://www.ietf.org/rfc/rfc2543.txt
H.323 ITU standards at http://www.itu.int/home/index.html
Multimedia Gateway Control Protocol (MGCP) v1.0, RFC 2705: ftp://ftp.isi.edu/
in-notes/rfc2705.txt
Megaco: http://www.ietf.org/rfc/rfc3015.txt
Real-Time Transport Protocol (RTP), RFC 1889: http://www.cs.columbia.edu/~hgs/rtp
Voice QoS
CIM Voice Internetworking: VoIP Quality of Service, Cisco Systems, ISBN 158720050-3.