System information

about, 257
future of telephony, 591
NANP and toll fraud, 127
toll lines, accessing, 133
tones, changing, 194
tos option (dundi.conf), 505
transcode_via_sln (asterisk.conf), 74
transcoding
codecs, 642
performance, 18
TRANSFER event, 299, 538
transferdigittimeout (features.conf), 223
translation cost, audio formats, 114
translators, codec translators, 18
Transmission Control Protocol (see TCP)
transmit_silence (asterisk.conf), 74
triggering calendar reminders, 402–406
TRIP (Telephony Routing over IP), 252
troubleshooting database issues, 353
trunk option (sla.conf), 328
trunking
about, 131
IAX trunking, 154
trunks
in Asterisk compared to other PBXs, 9
SLA key system example with analog trunks,
319–323
SLA key system example with SIP trunks,
323
TTL (SIP SRV record), 239
ttl option (dundi.conf), 505
two-party call, 547
two-party call CDR, 536
type option (jabber.conf), 420
type option (sip.conf), 93
types, logger.conf types, 524
tz option (voicemail.conf), 163
U
u (VoiceMail() application), 170
U (VoiceMail() application), 170
Ubuntu Server, 40–44
base system installation, 40
base system update, 43
calendars, 399
compiling LDAP support, 437
compiling support for XMPP, 419
compiling voicemail support, 412
converting music format, 80
cURL module, 394
installing Asterisk, 31
installing Festival, 440
installing PostgreSQL, 342
installing SNMP module, 551
MySQL, 343, 345
ODBC, 350
UDP (User Datagram Protocol), 630
udpbindaddr (sip.conf), 91
unanswered option (cdr.conf), 529
unauthenticated calls, 91
“underchin” paging and overhead, 229–236
underscore (_), pattern matching, 125
unified messaging, 173, 590
uniform resource identifiers (see URIs)
uninterruptible power supplies, 649
uniqueid CDR field, 528
uniqueid CEL event field, 539
UNISTIM, 625
unixODBC, 546
unnumbered priorities, dialplan syntax, 111
UNPAUSE event, 298
UNPAUSEALL event, 298
UnpauseQueueMember() application, 268
updatecdr option (agents.conf), 282
updatecdr option (queues.conf), 275
updating
Asterisk, 64
the dialplan, 122
UPGRADE.txt, 68
upgrading versus updating, 64
URI argument, Dial() application, 121
URIs (uniform resource identifiers)
dialing with, 91
passing URI information, 121
urlprefix option (agents.conf), 282
usedirectory option (voicemail.conf), 160
usegmtime option (cdr.conf), 532, 534
usegmtime option (cel.conf), 545
usegmtime option (cel_odbc.conf), 543
User Datagram Protocol (UDP), 630
user groups, 7
user option (manager.conf), 463
userfield CDR field, 528
userfield CEL event field, 539
username option (jabber.conf), 420
[username] section, manager.conf, 462
users
adding a system user in CentOS Server, 39
Index | 693