Page 600 - Asterisk™: The Future of Telephony

systems, preparing for Asterisk, 11–35 Cisco 7960 telephones and, 93
environments, 21–25 Thompson, James, 7
motherboards, choosing, 18–20 Time Division Multiplexing (TDM), 25, 47,
processors, choosing for, 16–18 247
Time To Live (ttl) field, 309
T Time Zone screen, 65

T-carrier circuits, 180 time-based conditional branching, 151–153
TIMEOUT dialplan function, 512
T1 cards, 26, 27, 70 TIMEOUT( ) function, 149
ztcfg and zttool, using, 47 timeouts, handling, 130
T1 digital circuits, 180 times argument (GotoIfTime( ) function), 152
t1min SIP parameter, 357 tip and ring, 170
t38pt_udpt1 SIP parameter, 357 TLS (Transport Layer Security), 190
Tab completion, 42 tmp/ directory, 60
tables (database) TOS (Type of Service), 343
ActiveRecord database, 238 tos_audio SIP parameter, 357
PostgreSQL, defining for in static realtime, tos_sip SIP parameter, 357
269 tos_video SIP parameter, 357
TCP (Transmission Control Protocol), 197 transcoding, 15
TDD MODE (AGI), 459 transfer parameter (IAX), 349
TDM (Time Division Multiplexing), 25, 47, Transfer( ) application, 440
247 Transmission Control Protocol (TCP), 197
TDM11B (Digium), 69 Transport Layer Security (TLS), 190
TDM2400P card, 26 trapezoid (SIP), 189
TDM400P cards, 26, 53 trixbox, 4
determining FXO/FXS ports on, 74 Trunk, 40
TDM800P card, 26 trunk parameter (IAX), 343
telco (telephone company), 74 trunkfreq parameter (IAX), 343
Telecommunication Standardization Bureau [trunkgroups], 78
(TSB), 318 trunking, 111, 347
telecommunications, 1 trunktimestamps parameter (IAX), 344
flexibility and, 3–5 trustrpid SIP parameter, 358
telephone lines, 70 TryExec( ) application, 440
telephones TrySystem( ) application, 440
FXS channels, configuring for, 79 TSB (Telecommunication Standardization
SIP configuration for, 82 Bureau), 318
types of, 29–34 ttl (Time To Live), 309
telephony, 167–184 TXTCIDNAME dialplan function, 513
adaptors, 33 Type of Service (TOS), 343
analog, 167–170 tz option, creating mailboxes, 155
future of, 317–335
gateway, 33
hardware, 25–29 U
temperature and electronics, 25 -u option (Python), 220
templates, using in configuration files, 115– u parameter (makerequest function), 259
117 udev daemon, 55
terminals, 33 UDP (User Datagram Protocol), 198
text-to-speech engines, 303 underscores (_), using pattern-matching, 137
text2wave utility, 305 Unified Messaging, 313
TFTP servers, 86, 90 uninterruptible power supplies, 21

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