在asterisk中，定義了許多變量，或是有些變量能夠被其讀取。下面給出了它們的列表。在每一個application的幫助文檔中，你可以獲得更多的信息。所有這些變量都是大寫的。

被*標(biāo)記的變量是內(nèi)建函數(shù)，不能在撥號方案中被設(shè)置，只能被讀取。對這些變量的賦值將被忽略。

${CDR(accountcode)}????* Account code (if specified)

${BLINDTRANSFER}?????????The name of the channel on the other side of a blind transfer

${BRIDGEPEER}????????????Bridged peer

${BRIDGEPVTCALLID}???????Bridged peer PVT call ID (SIP Call ID if a SIP call)

${CALLERID(ani)}???????* Caller ANI (PRI channels)

${CALLERID(ani2)}??????* ANI2 (Info digits) also called Originating line information or OLI

${CALLERID(all)}???????* Caller ID

${CALLERID(dnid)}??????* Dialed Number Identifier

${CALLERID(name)}??????* Caller ID Name only

${CALLERID(num)}???????* Caller ID Number only

${CALLERID(rdnis)}?????* Redirected Dial Number ID Service

${CALLINGANI2}?????????* Caller ANI2 (PRI channels)

${CALLINGPRES}?????????* Caller ID presentation for incoming calls (PRI channels)

${CALLINGTNS}??????????* Transit Network Selector (PRI channels)

${CALLINGTON}??????????* Caller Type of Number (PRI channels)

${CHANNEL}?????????????* Current channel name

${CONTEXT}?????????????* Current context

${DATETIME}????????????* Current date time in the format: DDMMYYYY-HH:MM:SS

?????????????????????????(Deprecated; use ${STRFTIME(${EPOCH},,%d%m%Y-%H:%M:%S)})

${DB_RESULT}?????????????Result value of DB_EXISTS() dial plan function

${EPOCH}???????????????* Current unix style epoch

${EXTEN}???????????????* Current extension

${ENV(VAR)}??????????????Environmental variable VAR

${GOTO_ON_BLINDXFR}??????Transfer to the specified context/extension/priority

?????????????????????????after a blind transfer (use ^ characters in place of

?????????????????????????| to separate context/extension/priority when setting

?????????????????????????this variable from the dialplan)

${HANGUPCAUSE}?????????* Asterisk cause of hangup (inbound/outbound)

${HINT}????????????????* Channel hints for this extension

${HINTNAME}????????????* Suggested Caller*ID name for this extension

${INVALID_EXTEN}?????????The invalid called extension (used in the "i" extension)

${LANGUAGE}????????????* Current language (Deprecated; use ${LANGUAGE()})

${LEN(VAR)}????????????* String length of VAR (integer)

${PRIORITY}????????????* Current priority in the dialplan

${PRIREDIRECTREASON}?????Reason for redirect on PRI, if a call was directed

${TIMESTAMP}???????????* Current date time in the format: YYYYMMDD-HHMMSS

?????????????????????????(Deprecated; use ${STRFTIME(${EPOCH},,%Y%m%d-%H%M%S)})

${TRANSFER_CONTEXT}??????Context for transferred calls

${FORWARD_CONTEXT}???????Context for forwarded calls

${UNIQUEID}????????????* Current call unique identifier

${SYSTEMNAME}??????????* value of the systemname option of asterisk.conf

${ENTITYID}????????????* Global Entity ID set automatically, or from asterisk.conf

Application的返回值（Application return values）

當(dāng)你調(diào)用有些application的時候，它們會返回一個值供你讀取。對于每一個application，這些狀態(tài)字段是唯一的。各種狀態(tài)值，前參考每個application的幫助文檔。

${AGISTATUS}?????????* agi()

${AQMSTATUS}?????????* addqueuemember()

${AVAILSTATUS}???????* chanisavail()

${CHECKGROUPSTATUS}??* checkgroup()

${CHECKMD5STATUS}????* checkmd5()

${CPLAYBACKSTATUS}???* controlplayback()

${DIALSTATUS}????????* dial()

${DBGETSTATUS}???????* dbget()

${ENUMSTATUS}????????* enumlookup()

${HASVMSTATUS}???????* hasnewvoicemail()

${LOOKUPBLSTATUS}????* lookupblacklist()

${OSPAUTHSTATUS}?????* ospauth()

${OSPLOOKUPSTATUS}???* osplookup()

${OSPNEXTSTATUS}?????* ospnext()

${OSPFINISHSTATUS}???* ospfinish()

${PARKEDAT}??????????* parkandannounce()

${PLAYBACKSTATUS}????* playback()

${PQMSTATUS}?????????* pausequeuemember()

${PRIVACYMGRSTATUS}??* privacymanager()

${QUEUESTATUS}???????* queue()

${RQMSTATUS}?????????* removequeuemember()

${SENDIMAGESTATUS}???* sendimage()

${SENDTEXTSTATUS}????* sendtext()

${SENDURLSTATUS}?????* sendurl()

${SYSTEMSTATUS}??????* system()

${TRANSFERSTATUS}????* transfer()

${TXTCIDNAMESTATUS}??* txtcidname()

${UPQMSTATUS}????????* unpausequeuemember()

${VMSTATUS}??????????* voicmail()

${VMBOXEXISTSSTATUS} * vmboxexists()

${WAITSTATUS}????????* waitforsilence()

各種application的相關(guān)變量（Various application variables）

${CURL}?????????????????* Resulting page content for curl()

${ENUM}?????????????????* Result of application EnumLookup

${EXITCONTEXT}????????????Context to exit to in IVR menu (app background())

??????????????????????????or in the RetryDial() application

${MONITOR}??????????????* Set to "TRUE" if the channel is/has been monitored (app monitor())

${MONITOR_EXEC}???????????Application to execute after monitoring a call

${MONITOR_EXEC_ARGS}??????Arguments to application

${MONITOR_FILENAME}???????File for monitoring (recording) calls in queue

${QUEUE_PRIO}?????????????Queue priority

${QUEUE_MAX_PENALTY}??????Maximum member penalty allowed to answer caller

${QUEUE_MIN_PENALTY}??????Minimum member penalty allowed to answer caller

${QUEUESTATUS}????????????Status of the call, one of:

??????????????????????????(TIMEOUT | FULL | JOINEMPTY | LEAVEEMPTY | JOINUNAVAIL | LEAVEUNAVAIL)

${RECORDED_FILE}????????* Recorded file in record()

${TALK_DETECTED}????????* Result from talkdetect()

${TOUCH_MONITOR}??????????The filename base to use with Touch Monitor (auto record)

${TOUCH_MONITOR_PREF}???* The prefix for automonitor recording filenames.

${TOUCH_MONITOR_FORMAT}???The audio format to use with Touch Monitor (auto record)

${TOUCH_MONITOR_OUTPUT} * Recorded file from Touch Monitor (auto record)

${TOUCH_MONITOR_MESSAGE_START} Recorded file to play for both channels at start of monitoring session

${TOUCH_MONITOR_MESSAGE_STOP} Recorded file to play for both channels at end of monitoring session

${TXTCIDNAME}???????????* Result of application TXTCIDName

${VPB_GETDTMF}????????????chan_vpb

MeetMe會議橋[會議電話橋分器]（The MeetMe Conference Bridge）

${MEETME_RECORDINGFILE}??????Name of file for recording a conference with the "r" option

${MEETME_RECORDINGFORMAT}????Format of file to be recorded

${MEETME_EXIT_CONTEXT}???????Context for exit out of meetme meeting

${MEETME_AGI_BACKGROUND}?????AGI script for Meetme (DAHDI only)

${MEETMESECS}??????????????* Number of seconds a user participated in a MeetMe conference

${CONF_LIMIT_TIMEOUT_FILE}???File to play when time is up. Used with the L() option.

${CONF_LIMIT_WARNING_FILE}???File to play as warning if 'y' is defined. The default is to say the time remaining.??Used with the L() option.

The VoiceMail() application

${VM_CATEGORY}??????Sets voicemail category

${VM_NAME}????????* Full name in voicemail

${VM_DUR}?????????* Voicemail duration

${VM_MSGNUM}??????* Number of voicemail message in mailbox

${VM_CALLERID}????* Voicemail Caller ID (Person leaving vm)

${VM_CIDNAME}?????* Voicemail Caller ID Name

${VM_CIDNUM}??????* Voicemail Caller ID Number

${VM_DATE}????????* Voicemail Date

${VM_MESSAGEFILE} * Path to message left by caller

The VMAuthenticate() application

${AUTH_MAILBOX}???* Authenticated mailbox

${AUTH_CONTEXT}???* Authenticated mailbox context

DUNDiLookup()

${DUNDTECH}???????* The Technology of the result from a call to DUNDiLookup()

${DUNDDEST}???????* The Destination of the result from a call to DUNDiLookup()

chan_dahdi

${ANI2}???????????????* The ANI2 Code provided by the network on the incoming call. (ie, Code 29 identifies call as a Prison/Inmate Call)

${CALLTYPE}???????????* Type of call (Speech, Digital, etc)

${CALLEDTON}??????????* Type of number for incoming PRI extension i.e. 0=unknown, 1=international, 2=domestic, 3=net_specific, 4=subscriber, 6=abbreviated, 7=reserved

${CALLINGSUBADDR}?????* Called PRI Subaddress

${FAXEXTEN}???????????* The extension called before being redirected to "fax"

${PRIREDIRECTREASON}??* Reason for redirect, if a call was directed

${SMDI_VM_TYPE}???????* When an call is received with an SMDI message, the 'type' of message 'b' or 'u'

chan_sip

${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 (deprecated)

${SIPURI}????????????* SIP uri

${SIP_CODEC}???????????Set the SIP codec for a call

${SIP_URI_OPTIONS}???* additional options to add to the URI for an outgoing call

${RTPAUDIOQOS}?????????RTCP QoS report for the audio of this call

${RTPVIDEOQOS}?????????RTCP QoS report for the video of this call

chan_agent

${AGENTMAXLOGINTRIES}??Set the maximum number of failed logins

${AGENTUPDATECDR}??????Whether to update the CDR record with Agent channel data

${AGENTGOODBYE}????????Sound file to use for "Good Bye" when agent logs out

${AGENTACKCALL}????????Whether the agent should acknowledge the incoming call

${AGENTAUTOLOGOFF}?????Auto logging off for an agent

${AGENTWRAPUPTIME}?????Setting the time for wrapup between incoming calls

${AGENTNUMBER}???????* Agent number (username) set at login

${AGENTSTATUS}???????* Status of login ( fail | on | off )

${AGENTEXTEN}????????* Extension for logged in agent

The Dial() application

${DIALEDPEERNAME}?????* Dialed peer name

${DIALEDPEERNUMBER}???* Dialed peer number

${DIALEDTIME}?????????* Time for the call (seconds). Is only set if call was answered.

${ANSWEREDTIME}???????* Time from answer to hangup (seconds)

${DIALSTATUS}?????????* Status of the call, one of: (CHANUNAVAIL | CONGESTION | BUSY | NOANSWER | ANSWER | CANCEL | DONTCALL | TORTURE)

${DYNAMIC_FEATURES}???* The list of features (from the [applicationmap] section of?features.conf) to activate during the call, with feature names separated by '#' characters

${LIMIT_PLAYAUDIO_CALLER}??Soundfile for call limits

${LIMIT_PLAYAUDIO_CALLEE}??Soundfile for call limits

${LIMIT_WARNING_FILE}??????Soundfile for call limits

${LIMIT_TIMEOUT_FILE}??????Soundfile for call limits

${LIMIT_CONNECT_FILE}??????Soundfile for call limits

${OUTBOUND_GROUP}??????????Default groups for peer channels (as in SetGroup)??* See "show application dial" for more information

The chanisavail() application

${AVAILCHAN}??????????* the name of the available channel if one was found

${AVAILORIGCHAN}??????* the canonical channel name that was used to create the channel

${AVAILSTATUS}????????* Status of requested channel

撥號方案宏（Dialplan Macros）

${MACRO_EXTEN}????????* The calling extensions

${MACRO_CONTEXT}??????* The calling context

${MACRO_PRIORITY}?????* The calling priority

${MACRO_OFFSET}?????????Offset to add to priority at return from macro

The ChanSpy() application

${SPYGROUP}???????????* A ':' (colon) separated list of group names. (To be set on spied on channel and matched against the g(grp) option)

OSP

${OSPINHANDLE}??????????OSP handle of in_bound call

${OSPINTIMELIMIT}???????Duration limit for in_bound call

${OSPOUTHANDLE}?????????OSP handle of out_bound call

${OSPTECH}??????????????OSP technology

${OSPDEST}??????????????OSP destination

${OSPCALLING}???????????OSP calling number

${OSPOUTTOKEN}??????????OSP token to use for out_bound call

${OSPOUTTIMELIMIT}??????Duration limit for out_bound call

${OSPRESULTS}???????????Number of remained destinations

總結(jié)

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