System information

DIDs (direct inward dialing numbers), 145
differentiated service, 631
digit 9, accessing external lines, 132
digital circuit-switched telephone network,
610–614
digital circuits, configuring, 138
digital interface cards, requirements, 654
digital signaling protocols, 612
digital telephones, requirements, 658
digital telephony
about, 600–610
PSTN circuits, 135
digitally encoding an analog waveform, 601
Digium
cards, 100, 136, 185–189, 186
FAA, 446
packages, 46
Digium Asterisk Hardware Device Interface
(see DAHDI)
direct inward dialing numbers (DIDs), 145
[directories] section (asterisk.conf), 71
Directory() application, 171
directoryintro option (voicemail.conf), 160
DISA() application, 324, 325
disabling
Digium FAA, 446
spandsp, 446
disallow (sip.conf), 94, 98
disconnect (features.conf), 225
displayconnects option (manager.conf), 461,
462
disposition CDR field, 528
distributed denial of service attacks, 258
distributed device states, 309–318, 496–499
OpenAIS, 310–314
Asterisk configuration, 312
installation, 310
OpenAIS configuration, 311
testing device state changes, 313
over a LAN, 496
over a WAN, 497
XMPP, 314–318
Asterisk configuration, 316
installation, 315
testing, 317
XMPP accounts, 316
distributed IVR, 585
Distributed Universal Number Discovery (see
DUNDi)
distribution installation, 35–44
CentOS Server, 35–40
adding a system user, 39
base system installation, 35
base system update, 38
enabling NTP for accurate system time,
38
Ubuntu Server, 40–44
base system installation, 40
base system update, 43
enabling NTP for accurate system time,
43
DMZ (demilitarized zone), 638
DNIS number, 146
DNS and SIP URIs, 237–246
accepting calls to your system, 240–246
dialing SIP URIs from Asterisk, 246
SIP URI, 238
SRV records, 238
documentation_language (asterisk.conf), 74
dollar sign square brackets ($[]), Asterisk
expressions, 195
dontwarn (asterisk.conf), 73
downloading
DAHDI, 136
software, 46
drivers
channel drivers, 17
DAHDI drivers, 187
DS-0, 610
dst CDR field, 527
dstchannel CDR field, 527
DTMF digits, 598
dtmf logger.conf type, 525
dtmf option (manager.conf), 463
DTMF-based features, 221
dtmfmode (sip.conf), 94
dumpcore (asterisk.conf), 73
DUNDi (Distributed Universal Number
Discovery), 503–522
about, 503
Asterisk configuration, 507–522
controlling responses, 516–519
general, 507
initial DUNDi peer definition, 509
lookups from dialplan, 519
mapping contexts, 510–514
remote connections, 514
dundi.conf, 505
Index | 675