Introduction Standards Map Voice Principles
Digital Transmission
Analog Signaling ISDN Signaling Voice over X Implementation Services
Toll Bypass Voice over ISDN Voice over IP
Voice over Frame Relay
Voice over ATM IP Telephony
IP Phones
IP PBXs Gateways Multimedia
Fax
Video Start Dial Supervision -- Seize the Trunk
Wink Start
Immediate Start
Delay Start
Ground Start
Loop Start Address Signaling
Dial Pulse Signaling
Dual Tone Multi-Frequency (DTMF)
E&M Signaling Call Control Signaling
CAS
CCS SS7 Voice over IP Hardware
Analog Ports FXS Ports FXO Ports E&M Ports
Digital Ports Signaling and Transport
H.323 Terminals Gateways Gatekeepers Gatekeepers Are Optional H.225 H.245 RAS RTP
H.323 Call Stages H.323 Discovery and Registration What Is a Zone? Intrazone Call Placement Interzone Call Placement H.323 Call Setup Media Channel Setup Media Stream and Media Control Flows Call Termination
Session Initiation Protocol SIP Components SIP Messages
Media Gateway Control Protocol MGCP Supports Only VoIP Connections MEGACO and H.248 MEGACO Provides Translation
Codecs Additional VoIP Considerations
Dial Plans
Bandwidth Requirements
The Importance of Delay
The Role of QoS Configuring Voice over IP
Configuring FXS/FXO Ports Configuring Voice Activity Detection (VAD)
Configuring E&M Ports
The connection Command connection plar
Configuring Dial Peers Dial Peer Tags Codecs Must Match!
Configuring Digit Manipulation
Configuring Voice over Frame Relay Map Classes
Configuring Voice over ATM
Configuring Digital Voice BRI PRI
Adding Q.931 Support
Configuring QSIG
Configuring CAS
Configuring CCS Conclusions and Summary References