PJSIP_SEND_SESSION_REFRESH()

Since 13.12.0, 14.1.0 Functions Found this useful? Upvote it. ×

W/O: Initiate a session refresh via an UPDATE or re-INVITE on an established media session

Last reviewed 2026-04-14

PJSIP_SEND_SESSION_REFRESH([update_type])
Description

This function will cause the PJSIP stack to immediately refresh the media session for the channel. This will be done using either a re-INVITE (default) or an UPDATE request.

This is most useful when combined with the PJSIP_MEDIA_OFFER dialplan function, as it allows the formats in use on a channel to be re-negotiated after call setup.

Warning

The formats the endpoint supports are not checked or enforced by this function. Using this function to offer formats not supported by the endpoint may result in a loss of media.

title="Re-negotiate format to g722" ; Within some existing extension on an answered channel same => n,Set(PJSIP_MEDIA_OFFER(audio)=!all,g722) same => n,Set(PJSIP_SEND_SESSION_REFRESH()=invite)

Arguments
  • update_type - The type of update to send. Default is invite.
    • invite - Send the session refresh as a re-INVITE.
    • update - Send the session refresh as an UPDATE.

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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()