S

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s (start) extension
safe_asterisk script 2nd
        remote console on TTY9
sampling analog waveform for digital encoding
        increasing resolution and rate
        quality effects of sampling rate
sampling frequency for digitally encoding analog signal
Sangoma cards
Sangoma Technologies, SS7 support
save dialplan command
SAY ALPHA command
SAY DATE command
SAY DATETIME command
SAY DIGITS command
SAY NUMBER command 2nd 3rd
SAY PHONETIC command
SAY TIME command
SayAlpha( ) application
SayDigits( ) application 2nd
sayit function
saynumber function
SayNumber( ) application
SayPhonetic( ) application
SayUnixTime( ) application
scalability of Asterisk
SCCP (Skinny Client Control Protocol)
scripts, AGI
        writing in Perl
        writing in PHP
        writing in Python
SCTP (Stream Control Transmission Protocol)
secret (SIP authentication password)
security
        enforcement with dialplan contexts
        H.323 protocol
        IAX protocol
        remote console on TTY9, disabling
        SIP
        system environment
SECURITY file
SEND IMAGE command 2nd
SEND TEXT command 2nd
SendDTMF( ) application
SendImage( ) application
SendText( ) application
SendURL( ) application
server-class motherboards, PCI slots
servers
        electrical circuits
        hardware selection
                choosing a motherboard
                choosing a processor
                performance issues
                power supply requirements
        large Asterisk systems
SET AUTOHANGUP command
SET CALLERID command
set command
SET CONTEXT command
SET EXTENSION command
SET MUSIC ON command
SET PRIORITY command
SET VARIABLE command
Set( ) application 2nd
        retrieving data from AstDB
        storing data in AstDB
SetAccount( ) application
SetAMAFlags( ) application
SetCallerID( ) application
SetCallerPres( ) application
SetCDRUserField( ) application
SetCIDName( ) application
SetCIDNum( ) application
SetGlobalVar( ) application 2nd
SetGroup( ) application
sethdlc utility
SetLanguage( ) application
SetMusicOnHold( ) application
SetRDNIS( ) application
SetVar( ) application
shortcomings of traditional telephone systems
show functions command
show subcommands
sidetone 2nd
signaling information (D-channels)
signaling methods
        for analog circuits
        hardware channels
        kewlstart, on FXS channel
signaling protocols
        digital
                Channel Associated Signaling (CAS)
                ISDN
                SS7
Signaling System 7 (SS7)
sinusoidal (sine) wave
SIP (Session Initiation Protocol) 2nd
        channel configuration
        channel definitions
        configuring
                client
                dialplan
                sip.conf file (example)
        conversion of proprietary digital signals to
        future of
        general parameters
        NAT and
        security
sip commands
SIP Interoperability Test (SIPIT)
sip show registry command
sip.conf file 2nd
        context name
        enabling DNS SRV record lookups
        example
sip_notify.conf file
SIPAddHeader( ) application
SIPDtmfMode( ) application
SIPGetHeader( ) application
Skinny Client Control Protocol (SCCP)
skinny.conf file
small systems
        choosing CPU
        system requirement guidelines
Smith, Allison
soft hangup command
soft phones
        connecting to Asterisk
        X-Lite SIP client
SoftHangup( ) application
SOHO systems, system requirement guidelines
SONET (Synchronous Optical Network)
sound files (pre-recorded)
        playing for unanswered or busy destinations
        playing over a channel
        playing with Background( )
sound prompts (asterisk-sounds package)
sound recordings, creating from the dialplan
sound waves, translation to electrical signals
sounds (phone system), for particular countries
sounds directory
sounds-extra.txt file
sounds.txt file
sounds/ directory
source code (Asterisk)
        obtaining
                extracting source code
                from CVS
        updating
sox application
spam
speech processing
speech recognition
Speex codec
Spencer, Mark, ix
spool directory
SRV records, DNS
SS7 (Signaling System 7)
stable Asterisk releases
staging directory
start (s) extension
stations
STDERR
        ensuring open file handles in AGI PHP script
        summary of AGI script tests
        using fflush function after writing to
        writing to with fwrite function
STDIN
        ensuring open file handles in AGI PHP script
        reading variables from using the fgets function
STDOUT
        AGI script sending commands to Asterisk
        ensuring open file handles in AGI PHP script
        using fflush command after writing to
        using fflush function after writing to
        writing to with fwrite function
steps
stop commands
StopMonitor( ) application
StopPlaytones( ) application
STREAM FILE command 2nd 3rd 4th
strict language checking, AGI scripts in Perl 2nd
string length of a variable, calculating
StripLSD( ) application
StripMSD( ) application
STS-1 circuit
SubString( ) application
Suffix( ) application
switch hook
symbolic link to Linux kernel sources
        depmod errors during compilation
        Linux 2.4 kernel
sys.stdin.readline command
sys.stdout.flush command
sys.stdout.write command
system prompts, customizing
system requirement guidelines
System( ) application