Asterisk kill line

>soft hangup [channel]

Asterisk hangup causes

http://gotoknow.org/blog/patrickz/157180

Q.931
http://en.wikipedia.org/wiki/Q.931

asterisk ลดสายค้าง

zapata.conf
...
[channels]

...

priindication=outofband
busydetect=yes
busycount=4
busypattern=500,500
callprogress=yes

....

Asteris video conference

[general]
videosupport=yes

[xxx]
......
allow=h263
allow=h263p

Asterisk Special Variables

Special Variables
Asterisk has some special variables that are automatically defined when a new channel (call) starts up. Later you will see an example of using the ${EXTEN} variable. These definitions come from the README.variables file.

${ACCOUNTCODE} Account code (if specified)
${CALLERID} Caller ID
${CALLERIDNAME} Caller ID Name only
${CALLERIDNUM} Caller ID Number only
${CALLINGPRES} PRI Caller ID presentation for incoming calls
${CHANNEL} Current channel name
${CONTEXT} Current context
${DATETIME} Current date time in the format: YYYY-MM-DD_HH:MM:SS
${DNID} Dialed Number Identifier
${ENUM} Result of application EnumLookup
${EPOCH} Current unix style epoch
${EXTEN} Current extension
${ENV(VAR)} Environmental variable VAR
${HANGUPCAUSE} Asterisk hangup cause
${INVALID_EXTEN} The invalid called extension (used in the "i" extension)
${LANGUAGE} Current language
${LEN(VAR)} String length of VAR (integer)
${MEETMESECS} Number of seconds a user participated in a MeetMe
${PRIORITY} Current priority
${RDNIS} Redirected Dial Number ID Service
${TIMESTAMP} Current date time in the format: YYYYMMDD-HHMMSS
${TXTCIDNAME} Result of application TXTCIDName
${UNIQUEID} Current call unique identifier

${SIPCALLID} SIP Call-ID: header verbatim (for logging or CDR matching)
${SIPDOMAIN} SIP destination domain of an inbound call (if appropriate)
${SIPUSERAGENT} SIP user agent

The dial() application sets the following variables:

${DIALEDPEERNAME} Dialed peer name
${DIALEDPEERNUMBER} Dialed peer number
${DIALEDTIME} Total time for the call in seconds (Network time).
${ANSWEREDTIME} Time from answer to end of call in seconds.
${DIALSTATUS} Status of the call, one of:
CHANUNAVAIL CONGESTION BUSY NOANSWER ANSWER CANCEL

Asterisk CLI

start asterisk
#/etc/init.d/asterisk start

start CLI
#asterisk -r

-v Increase the level of verboseness on the console. The more times
-v is specified, the more verbose the output is.
Specifying this option implies -f and will cause asterisk to no
longer fork or detach from the controlling terminal. This
option may also be used in conjunction with -r and -R.

Note: This always sets the verbose level in the asterisk process,
even if it is running in the background. This will affect the
size of your log files.