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A-law companding algorithm
        use with G.711 codec
A/D ( analog-to-digital ) converter
abort halt command
AbsoluteTimeout( )
AbsoluteTimeout( ) application
adapters, telephony
Adaptive Differential Pulse-Code Modulation (ADPCM)
add command
add extension command
add ignorepat command
add queue member command
add-ons
AddQueueMember( ) application
adsi.conf file
ADSIProg( ) application
adtranvofr.conf file
AgentCallbackLogin( ) application
AgentLogin( ) application
AgentMonitorOutgoing( ) application
agents .conf file
aggressive residual echo suppression
AGI (Asterisk Gateway Interface)
        debugging
        fundamentals of communication
                calling AGI script from dialplan
                standard pattern of communication
                STDIN, STDOUT, and STDERR
        Perl AGI library
        PHP AGI library
        Python AGI library
        reference
        writing scripts in Perl
        writing scripts in PHP
                important steps to remember
        writing scripts in Python
                important steps to remember
agi debug command 2nd
agi no debug command
AGI( ) application 2nd
agi-bin/ directory
agi-test.agi script
alarm system for your home, controlling
AlarmReceiver( ) application
alarmreceiver.conf file
aliasing
alsa.conf file
alternating current (AC) voltage, analog phone ringer
AMD CPUs
        IRQ latency and
        power FPUs
analog circuits
Analog Display Services Interface (ADSI)
analog ground start lines
analog interface cards
analog interfaces
analog telephones
analog telephony
        echo, why it occurs
        parts of analog telephone
        Tip and Ring wires
Analog Terminal Adaptor (ATA)
analog waveform, digitally encoding
analog waveform, digitization of
analog-to-digital (A/D) converter
answer command 2nd
Answer( ) application 2nd 3rd
        Festival( ) application and
APIC-enabled motherboards, IRQ control
AppendCDRUserField( ) application
applications
        AGI
        Background( )
        Congestion( )
        Dial( )
        extensions
                s (start) extension
        Goto( )
        modules.conf file
        reference
        SayDigits( )
        Zapateller( )
arguments (application)
        Dial( )
        Goto( )
arguments, using in macros
AstDB (Asterisk database)
        deleting data
        retrieving data from
        rotating key for DUNDI information
        storing data
        using in the dialplan
astdb file
Asterisk
        acceptance of
        challenges to
        community for development and support
        compiling
        configuring for Festival
        directories used by
        Documentation Project
        future of
        Internet Relay Chat (IRC) channels
        loading
                CLI commands
        mailing lists
        Manager
        passing call control to an external program
        sizes of systems
        source code, obtaining
        things now possible
        VoIP
        Wiki
asterisk package
asterisk program
        -c (console) flag
        -r (remote) flag
        running with -h switch
asterisk-addons package
asterisk-sounds package 2nd
        installing
Asterisk-users list
asterisk.conf file
Asterisk::AGI Perl module
ATA (Analog Terminal Adaptor)
audio
        built-in components on motherboards
        digital
        quality problems on inadequate systems
audio formats, translation costs
audio streams, packetization for transport over IP networks
Authenticate( ) application
authentication
        IAS FWD incoming calls
        IAX connections
        IAX protocol
        inbound and outbound, Asterisk scheme
        secret (password) in SIP
        SIP
        SIP client
        with Manager
auto-attendants
Automated Attendant (AA), IVR vs.
Automatic Ringdown circuit