Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] E&M (Ear & Mouth or recEive & transMit) signaling E-1 lines 2nd E.164 ITU standard for phone number assignment E.164 numbering specification e164.org EAGI( ) (enhanced AGI) application EAGI( ) application echo managing why it occurs echo cancellation choosing method disabling removing echo on analog lines echo suppression, aggressive echo training 2nd Echo( ) application testing X-Lite soft phone verifying bidirectional communication on FXS channel verifying bidirectional communications for FXO channel electrical circuits electrical regulations power quality and safety of users electrical signals, translation of sound waves to Electronic Numbering (ENUM) system emergency calls, outbound enabling on FXO line encoding audio digitally EndWhile( ) application entity ID (dundi.conf) ENUM (Telephone Number Mapping) group enum.conf file ENUMLookup( ) application environment variables environment, system electrical circuits equipment room grounding power conditioning and UPSs equipment room for systems ERROR messages error reporting, turning off HTML messages in PHP 2nd Eval( ) application EXEC command Exec( ) application ExecIf( ) application exit command expressions basic operators extconfig .conf file extensions added to [internal] context defining in dialplan contexts dialplan contexts invalid entries and timeouts priorities unnumbered s (start) extension timeout argument for Dial( ) extensions reload command extensions.conf file 2nd context name for SIP channel dialplan specification dundi local context 2nd global variables IAX call to FWD echo test application IAX FWD incoming calls instructions to perform inside context on FXO line parsing of expressions with bison sample file external program, passing call control to |