System information

storing data in, 214
using in the dialplan, 215
backends, 172–173
IMAP, 173
Linux filesystem, 172
ODBC, 173
storehistory option (dundi.conf), 506
strategy option (queues.conf), 264, 275
STREAM FILE AGI command, 484
strong passwords, 567
studio prompts, 337
stunaddr option (gtalk.conf), 426
subFreenum context, 255
subroutines, GoSub() dialplan application,
207–211
subscribecontext option (sip.conf), 307
Subversion, 47
switch hook, 599
switchtype, 140
syntax
dialplan, 107–115
dialplan functions, 198
dialplan pattern matching, 125
SYSCOMPAT event, 299
syslog daemon, 526
system monitoring and logging, 523–559
CDRs, 527–537
backends, 530–536
caveats, 537
cdr.conf, 529
contents, 527
dialplan applications, 529
example call detail records, 536
CEL, 537–549
backends, 540–546
cel.conf, 540
channel event contents, 539
channel event types, 537
dialplan applications, 540
example channel events, 546–549
logger.conf, 523–527
SNMP, 551–559
configuring, 552–558
installing, 551
monitoring Asterisk with OpenNMS,
558
system option (manager.conf), 463
system time, enabling NTP for accurate system
time, 43
system users, adding in CentOS Server, 39
system.conf, 143
systemname, 375
systemname (asterisk.conf), 73
T
T-carrier circuits, 611
T1 lines, 138
table option (cel_odbc.conf), 543
tailor-made private telecommunications
networks, 594
Target (SIP SRV record), 239
TCP (Transmission Control Protocol)
about, 629
AGI over TCP: FastAGI, 478
AMI over TCP, 458
tcpbindaddr (sip.conf), 91
tcpenable (sip.conf), 92
TDD MODE AGI command, 484
teenagers and security, 586
telemarketing calls, Zapateller() application,
217
telephone naming concepts, 84
telephony, 597–615
analog telephony, 597–600
digital circuit-switched telephone network,
610–614
digital telephony, 600–610
hardware requirements, 653–657
packet-switched networks, 615
telephony adaptors, requirements, 661
telephony future, 1–8, 577–595
Asterisk, 586–595
barriers to entry, 594
bottleneck engineering, 592
complexity, 594
fear, uncertainty and doubt, 592
high-fidelity voice, 588
hosted solutions of similar complexity to
corporate websites, 594
integration of communications
technologies, 595
peering, 590
quality of service, 593
regulatory wars, 592
speech processing, 587
standards, 591
tailor-made private telecommunications
networks, 594
Index | 691