System information

Network Time Protocol (see NTP)
networks
digital circuit-switched telephone network,
610–614
packet-switched networks, 615
nextaftercmd option (voicemail.conf), 164
nocallerid (Zapateller() application), 217
nocolor (asterisk.conf), 73
nocomunsolicit option (dundi.conf), 506
nofork (asterisk.conf), 72
noinclude option (dundi.conf), 507
noload (modules.conf), 77
noload directive, 76
NOOP AGI command, 483
NoOp() dialplan application, 516
nopartial option (dundi.conf), 506
Nortel’s DMS switch, 140
North American Number Plan (see NANP)
notice logger.conf type, 524
notifycid option (sip.conf), 307
notifyhold option (sip.conf), 307
notifyringing option (sip.conf), 307
nounsolicited option (dundi.conf), 506
NTP (Network Time Protocol)
enabling for accurate system time, 38
NTP for accurate system time, 43
ntpd command, 38
number-mapping context, 146
Nyquist’s Theorem, 606
O
OC circuits, 612
ODBC (Open Database Connectivity)
configuring for Microsoft SQL, 350
configuring for MySQL, 349
configuring for PostgreSQL, 347
configuring res_odbc to allow Asterisk to
connect through ODBC, 352
validating the ODBC connector, 351
voicemail, 378–387
configuring voicemail.conf for ODBC
storage, 382
creating the large object type for
PostgreSQL, 379
storage table layout, 381
testing, 383–387
voicemail storage backends, 173
ODBC connector, 341
odbc show CLI command, 352
odbcstorage option (res_odbc.conf), 382
odbcstorage option (voicemail.conf), 160
odbctable option (voicemail.conf), 160
ODBC_FETCH() function, 361
office-phone (sip.conf), 93
onboard hardware echo cancellation, 633
open architecture, 581
open source telephony, 580–586
community, 582
conference rooms, 585
consumers needs, 580
home automation, 586
legacy PBX migration gateway, 582
low-barrier IVR, 583
open architecture, 581
response to new technologies, 582
standards compliance, 582
OpenAIS, 310–314, 496
Asterisk configuration, 312
installation, 310
OpenAIS configuration, 311
testing device state changes, 313
OpenLDAP, configuration, 435
OpenNMS
about, 551
configuring SNMP, 552–558
monitoring Asterisk, 558
OpenR2 project, 141
OpenSSL, 150
opentimeout option (voicemail.conf), 417
OpenWRT, 645
operator option (voicemail.conf), 164
operators
dialplan, 196
same (=>) operator, 112
option argument, Dial() application, 121
options argument (Read() application), 390
[options] section (asterisk.conf), 72
order option (dundi.conf), 506
organization option (dundi.conf), 505
originate option (manager.conf), 463
outgoing fax handling, 449–453
email to fax, 451
file format, 450
transmitting a fax from Asterisk, 450
outkey option (dundi.conf), 506
overflow, ACD queues, 291
overhead and “underchin” paging, 229–236
overhead paging, 229
684 | Index