System information

echo on DAHDi channels, 633
dundi lookup command, 513
dundi show peer command, 513
dundi.conf, 505
DUNDILOOKUP() function, 519
DUNDIQUERY() function, 519, 520
DUNDIRESULT() function, 519, 520
duration CDR field, 528
dust requirements, 653
dynamic realtime, 176, 368, 371–375
dynamically adding extension numbers, 517
DYNAMIC_FEATURES variable, 226, 227
E
E.164, 590
e164.org, 591
EAGI (Enhanced AGI), 477
eastern option (voicemail.conf), 166
echo, 632–633
DAHDi channels, 633
echo cancellation, 101, 642, 656
hardware echo cancellation, 633
why echo occurs, 632
electric circuits requirements, 652
email
email to fax, 451
fax to email, 447
sending, 568
email option (dundi.conf), 505
emailbody option (voicemail.conf), 161
emaildateformat option (voicemail.conf), 161
emailsubject option (voicemail.conf), 161
emergency dialing, 154
enable option (cdr.conf), 529
enable option (cel.conf), 540
enabled option (http.conf), 464
enabled option (manager.conf), 460
enabling
NTP for accurate system time, 38, 43
SNMPv3, 555
encryption
audio with Secure RTP, 637
IAX protocol, 154
media, 571
SIP calls, 150
VoIP, 638
end CDR field, 528
endbeforehexten option (cdr.conf), 529
endcall option (agents.conf), 281
enddtmf option (agents.conf), 282
Enhanced AGI (EAGI), 477
ENTERQUEUE event, 298
entityid option (dundi.conf), 505
ENUM, 591
ENUM and E.164, 247–250
Asterisk and ENUM, 249
E.164 and the ITU, 247
ENUM, 248
ENUMLOOKUP() function, 250, 255
envelope option (voicemail.conf), 164
environment
modifying channel configuration files for,
98
requirements, 649–653
environment variables
about, 124
AGI environment variables, 480
equipment room requirements, 652
error logger.conf type, 524
european option (voicemail.conf), 166
event, 538
eventfilter option (manager.conf), 462
eventmemberstatus option (queues.conf), 280
events
AMI message encoding, 467
channel events, 537–539
manager events: AMI, 470
events option (cel.conf), 540
eventtime CEL event field, 539
eventtype CEL event field, 539
eventwhencalled option (queues.conf), 280
exclamation mark (!), in section name, 92
EXEC AGI command, 483
execincludes (asterisk.conf), 73
exitcontext option (voicemail.conf), 164
EXITEMPTY event, 298
EXITWITHKEY event, 298
EXITWITHTIMEOUT event, 298
expressions, 195–198
basic expressions, 195
operators, 196
expungeonhangup option (voicemail.conf),
416
extconfig.conf, 371, 382, 439
exten CEL event field, 539
Extensible Messaging and Presence Protocol
(see XMPP)
676 | Index