V

Index

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Variable Bitrate (VBR) codecs
variable manipulation
variables
        AstDB, setting
        ImportVar( ) application
        Macro( ) application
        reading from STDIN with fgets function
        sent by Asterisk to AGI script at startup 2nd
        sent by Asterisk to AGI script on startup
variables, using in dialplan
        adding variables to dialplan
        channel variables
        environment variables
        global variables
VERBOSE command
Verbose( ) application
verbosity , setting level for debugging messages
VIA-based motherboards, compiling Asterisk on
video
video camera connected to PC, live chats through
video components (built-in) on motherboards
video-conferencing
        IP transport mechanism (H.323)
Virtual Private Network (VPN), use with IAX
VMAuthenticate( ) application
voice menus , creation with Background( )
Voice of Asterisk
voice prompts for Asterisk, sounds/ directory
voice, high-fidelity
voice-compression algorithms
voice-messaging, uniting with text messaging
voicemail
        accessing
        adding to dialplan
        applications
        creating mailboxes
        dial-by- name directory
VoiceMail( ) application 2nd
voicemail.conf file 2nd
voicemail/ directory
VoiceMailMain( ) application 2nd
Voicetronix, analog cards
VoIP (Voice over IP) 2nd
        access to, for legacy PBX
        alternative route to an extension number or PSTN telephone number
        Asterisk and
                register statements
                users, peers, and friends
        bottleneck engineering
        codecs
        echo
        Free World Dialup (FWD) service provider
        gateways providing access to PSTN circuits
        mobility with Wi-Fi
        need for protocols
        packet-switched networks
        proprietary protocols
        protocols
                H.323
                IAX
                MGCP
        protocols in use today
        Quality of Service (QoS)
                best effort method and
                DiffServ
                guaranteed service
                TCP, UDP, and SCTP
        Quality of Service, challenges to
        Session Initiation Protocol (SIP)
        SIP and IAX protocols
        spam
        Zapata Telephony Project
voltage
        AC and DC, in analog phones
        boosting for telephone during ringing
VPN (Virtual Private Network), use with H.323 protocol