DAHDI_CHANNEL()

Since N/A Functions Found this useful? Upvote it. ×

Set or get a property of a DAHDI channel.

Last reviewed 2026-04-14

DAHDI_CHANNEL(property[,channel])
Description

The DAHDI_CHANNEL function can be used to set or get properties of DAHDI channels that are not specific to Asterisk channels.

This function may also be called from non-DAHDI channels.

Set reverse polarity on current DAHDI channel
same => n,Set(DAHDI_CHANNEL(polarity)=1)
same => n,NoOp(${DAHDI_CHANNEL(polarity)})
Set call forwarding target for channel 1
same => n,Set(DAHDI_CHANNEL(callforwardnumber,1)=5552368)
same => n,NoOp(Calls now forwarding to ${DAHDI_CHANNEL(callforwardnumber,1)})
Arguments
  • property required - The property to set or get.
    • owner - R/O The name of the active channel on this DAHDI device.
    • callwait - R/O The name of the call waiting channel on this DAHDI device.
    • threeway - R/O The name of the three-way channel on this DAHDI device.
    • polarity - R/W The polarity of the channel (0 or 1, idle or reverse can also be used for setting).
    • dnd - R/W Whether Do Not Disturb is active.
    • callforward - R/W The call forwarding target number.
    • lastexten - R/W The last number dialed.
  • channel - The DAHDI channel number.
User Notes

Know a tip or gotcha for this topic? Share it below and help others.

Contribute a note

Share a tip, gotcha, or practical example. Keep it under 2000 characters. No questions (use the Asterisk community forums for support). Wrap code in backticks.

Moderated before publishing. Email never shown.

Related

UUID()

Generates an UUID.

Functions function dialplan
STIR_SHAKEN_ATTESTATION()

Sets STIR/SHAKEN Attestation parameters on an outgoing channel.

Functions function dialplan
SET()

SET assigns a value to a channel variable.

Functions function dialplan
RECORDING_INFO()

Retrieve information about a recording previously created using the Record application

Functions function dialplan
PJSIP_TRANSFER_HANDLING()

Set how transfers are handled for a PJSIP channel.

Functions function dialplan
Functions
CDR() ABS() AES_DECRYPT() AES_ENCRYPT() AGC() AGENT() AMI_CLIENT() ARRAY() AST_CONFIG() AST_SORCERY() BASE64_DECODE() BASE64_ENCODE() BASENAME() BLACKLIST() CALENDAR_BUSY() CALENDAR_EVENT() CALENDAR_QUERY() CALENDAR_QUERY_RESULT() CALENDAR_WRITE() CALLCOMPLETION() CALLERID() CALLERPRES() CDR_PROP() CHANNEL() CHANNELS() CHANNEL_EXISTS() CHECKSIPDOMAIN() CONFBRIDGE() CONFBRIDGE_CHANNELS() CONFBRIDGE_INFO() CONNECTEDLINE() CSV_QUOTE() CURL() CURLOPT() CUT() DAHDI_CHANNEL() DB() DB_DELETE() DB_EXISTS() DB_KEYCOUNT() DB_KEYS() DEC() DELETE() DENOISE() DEVICE_STATE() DIALGROUP() DIALPLAN_EXISTS() DIGIT_SUM() DIRNAME() DUNDILOOKUP() DUNDIQUERY() DUNDIRESULT() ENUMLOOKUP() ENUMQUERY() ENUMRESULT() ENV() EVAL() EVAL_EXTEN() EVAL_SUB() EXCEPTION() EXISTS() EXPORT() EXTENSION_STATE() FAXOPT() FEATURE() FEATUREMAP() FIELDNUM() FIELDQTY() FILE() FILE_COUNT_LINE() FILE_FORMAT() FILTER() FRAME_DROP() FRAME_TRACE() GEOLOC_PROFILE() GLOBAL() GLOBAL_DELETE() GLOBAL_EXISTS() GROUP() GROUP_COUNT() GROUP_LIST() GROUP_MATCH_COUNT() HANGUPCAUSE() HANGUPCAUSE_KEYS() HASH() HASHKEYS() HINT() HOLD_INTERCEPT() IAXPEER() IAXVAR() ICONV() IF() IFMODULE() IFTIME() IMPORT() INC() ISNULL() JABBER_RECEIVE() JABBER_STATUS() JITTERBUFFER() JSON_DECODE() KEYPADHASH() LEN() LISTFILTER() LOCAL() LOCAL_PEEK() LOCK() LOG_GROUP() LTRIM() MAILBOX_EXISTS() MASTER_CHANNEL() MATH() MAX() MD5() MEETME_INFO() MESSAGE() MESSAGE_DATA() MIN() MINIVMACCOUNT() MINIVMCOUNTER() MIXMONITOR() MUTEAUDIO() ODBC() ODBC_FETCH() PARK_GET_CHANNEL() PASSTHRU() PERIODIC_HOOK() PITCH_SHIFT() PJSIP_AOR() PJSIP_CONTACT() PJSIP_DIAL_CONTACTS() PJSIP_DTMF_MODE() PJSIP_ENDPOINT() PJSIP_HEADER() PJSIP_HEADERS() PJSIP_HEADER_PARAM() PJSIP_INHERITABLE_HEADER() PJSIP_MEDIA_OFFER() PJSIP_MOH_PASSTHROUGH() PJSIP_PARSE_URI() PJSIP_PARSE_URI_FROM() PJSIP_RESPONSE_HEADER() PJSIP_RESPONSE_HEADERS() PJSIP_SEND_SESSION_REFRESH() PJSIP_TRANSFER_HANDLING() POLARITY() POP() PP_EACH_EXTENSION() PP_EACH_USER() PRESENCE_STATE() PUSH() QUEUE_EXISTS() QUEUE_GET_CHANNEL() QUEUE_MEMBER() QUEUE_MEMBER_COUNT() QUEUE_MEMBER_LIST() QUEUE_MEMBER_PENALTY() QUEUE_VARIABLES() QUEUE_WAITING_COUNT() QUOTE() RAND() REALTIME() REALTIME_DESTROY() REALTIME_FIELD() REALTIME_HASH() REALTIME_STORE() RECORDING_INFO() REDIRECTING() REGEX() REPLACE() RTRIM() SAYFILES() SCRAMBLE() SET() SHA1() SHARED() SHELL() SHIFT() SIPPEER() SIP_HEADER() SIP_HEADERS() SMDI_MSG() SMDI_MSG_RETRIEVE() SORT() SPEECH() SPEECH_ENGINE() SPEECH_GRAMMAR() SPEECH_RESULTS_TYPE() SPEECH_SCORE() SPEECH_TEXT() SPRINTF() SQL_ESC() SQL_ESC_BACKSLASHES() SRVQUERY() SRVRESULT() STACK_PEEK() STAT() STIR_SHAKEN() STIR_SHAKEN_ATTESTATION() STRBETWEEN() STRFTIME() STRPTIME() STRREPLACE() SYSINFO() TALK_DETECT() TESTTIME() TIMEOUT() TOLOWER() TONE_DETECT() TOUPPER() TRIM() TRYLOCK() TXTCIDNAME() UNLOCK() UNSHIFT() URIDECODE() URIENCODE() UUID() VALID_EXTEN() VARIABLE_EXISTS() VERSION() VMCOUNT() VM_INFO() VOLUME()
Functions
CDR() ABS() AES_DECRYPT() AES_ENCRYPT() AGC() AGENT() AMI_CLIENT() ARRAY() AST_CONFIG() AST_SORCERY() BASE64_DECODE() BASE64_ENCODE() BASENAME() BLACKLIST() CALENDAR_BUSY() CALENDAR_EVENT() CALENDAR_QUERY() CALENDAR_QUERY_RESULT() CALENDAR_WRITE() CALLCOMPLETION() CALLERID() CALLERPRES() CDR_PROP() CHANNEL() CHANNELS() CHANNEL_EXISTS() CHECKSIPDOMAIN() CONFBRIDGE() CONFBRIDGE_CHANNELS() CONFBRIDGE_INFO() CONNECTEDLINE() CSV_QUOTE() CURL() CURLOPT() CUT() DAHDI_CHANNEL() DB() DB_DELETE() DB_EXISTS() DB_KEYCOUNT() DB_KEYS() DEC() DELETE() DENOISE() DEVICE_STATE() DIALGROUP() DIALPLAN_EXISTS() DIGIT_SUM() DIRNAME() DUNDILOOKUP() DUNDIQUERY() DUNDIRESULT() ENUMLOOKUP() ENUMQUERY() ENUMRESULT() ENV() EVAL() EVAL_EXTEN() EVAL_SUB() EXCEPTION() EXISTS() EXPORT() EXTENSION_STATE() FAXOPT() FEATURE() FEATUREMAP() FIELDNUM() FIELDQTY() FILE() FILE_COUNT_LINE() FILE_FORMAT() FILTER() FRAME_DROP() FRAME_TRACE() GEOLOC_PROFILE() GLOBAL() GLOBAL_DELETE() GLOBAL_EXISTS() GROUP() GROUP_COUNT() GROUP_LIST() GROUP_MATCH_COUNT() HANGUPCAUSE() HANGUPCAUSE_KEYS() HASH() HASHKEYS() HINT() HOLD_INTERCEPT() IAXPEER() IAXVAR() ICONV() IF() IFMODULE() IFTIME() IMPORT() INC() ISNULL() JABBER_RECEIVE() JABBER_STATUS() JITTERBUFFER() JSON_DECODE() KEYPADHASH() LEN() LISTFILTER() LOCAL() LOCAL_PEEK() LOCK() LOG_GROUP() LTRIM() MAILBOX_EXISTS() MASTER_CHANNEL() MATH() MAX() MD5() MEETME_INFO() MESSAGE() MESSAGE_DATA() MIN() MINIVMACCOUNT() MINIVMCOUNTER() MIXMONITOR() MUTEAUDIO() ODBC() ODBC_FETCH() PARK_GET_CHANNEL() PASSTHRU() PERIODIC_HOOK() PITCH_SHIFT() PJSIP_AOR() PJSIP_CONTACT() PJSIP_DIAL_CONTACTS() PJSIP_DTMF_MODE() PJSIP_ENDPOINT() PJSIP_HEADER() PJSIP_HEADERS() PJSIP_HEADER_PARAM() PJSIP_INHERITABLE_HEADER() PJSIP_MEDIA_OFFER() PJSIP_MOH_PASSTHROUGH() PJSIP_PARSE_URI() PJSIP_PARSE_URI_FROM() PJSIP_RESPONSE_HEADER() PJSIP_RESPONSE_HEADERS() PJSIP_SEND_SESSION_REFRESH() PJSIP_TRANSFER_HANDLING() POLARITY() POP() PP_EACH_EXTENSION() PP_EACH_USER() PRESENCE_STATE() PUSH() QUEUE_EXISTS() QUEUE_GET_CHANNEL() QUEUE_MEMBER() QUEUE_MEMBER_COUNT() QUEUE_MEMBER_LIST() QUEUE_MEMBER_PENALTY() QUEUE_VARIABLES() QUEUE_WAITING_COUNT() QUOTE() RAND() REALTIME() REALTIME_DESTROY() REALTIME_FIELD() REALTIME_HASH() REALTIME_STORE() RECORDING_INFO() REDIRECTING() REGEX() REPLACE() RTRIM() SAYFILES() SCRAMBLE() SET() SHA1() SHARED() SHELL() SHIFT() SIPPEER() SIP_HEADER() SIP_HEADERS() SMDI_MSG() SMDI_MSG_RETRIEVE() SORT() SPEECH() SPEECH_ENGINE() SPEECH_GRAMMAR() SPEECH_RESULTS_TYPE() SPEECH_SCORE() SPEECH_TEXT() SPRINTF() SQL_ESC() SQL_ESC_BACKSLASHES() SRVQUERY() SRVRESULT() STACK_PEEK() STAT() STIR_SHAKEN() STIR_SHAKEN_ATTESTATION() STRBETWEEN() STRFTIME() STRPTIME() STRREPLACE() SYSINFO() TALK_DETECT() TESTTIME() TIMEOUT() TOLOWER() TONE_DETECT() TOUPPER() TRIM() TRYLOCK() TXTCIDNAME() UNLOCK() UNSHIFT() URIDECODE() URIENCODE() UUID() VALID_EXTEN() VARIABLE_EXISTS() VERSION() VMCOUNT() VM_INFO() VOLUME()