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-rw-r--r--configs/sip.conf.sample8
1 files changed, 8 insertions, 0 deletions
diff --git a/configs/sip.conf.sample b/configs/sip.conf.sample
index c26e74104..d9ffb8578 100644
--- a/configs/sip.conf.sample
+++ b/configs/sip.conf.sample
@@ -502,6 +502,14 @@ srvlookup=yes ; Enable DNS SRV lookups on outbound calls
;use_q850_reason = no ; Default "no"
; Set to yes add Reason header and use Reason header if it is available.
+; When the Transfer() application sends a REFER SIP message, extra headers specified in
+; the dialplan by way of SIPAddHeader are sent out with that message. 1.8 and earlier did not
+; add the extra headers. To revert to 1.8- behavior, call SIPRemoveHeader with no arguments
+; before calling Transfer() to remove all additional headers from the channel. The setting
+; below is for transitional compatibility only.
+;
+;refer_addheaders=yes ; on by default
+
;autocreatepeers=no ; Allow any not exsplicitly defined here UAC to register
; WITHOUT AUTHENTICATION. Enabling this options poses a high
; potential security risk and should be avoided unless the