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-rw-r--r--UPGRADE.txt5
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diff --git a/UPGRADE.txt b/UPGRADE.txt
index e5bbb6ae1..fcdb803be 100644
--- a/UPGRADE.txt
+++ b/UPGRADE.txt
@@ -91,6 +91,11 @@ SIP
- A new manager event, "SessionTimeout" has been added and is triggered when
a call is terminated due to RTP stream inactivity or SIP session timer
expiration.
+ - SIP_CAUSE is now deprecated. It has been modified to use the same
+ mechanism as HANGUPCAUSE. Behavior should not change, but performance
+ should be vastly improved. The HANGUPCAUSE hash should now be used instead
+ of SIP_CAUSE. Because of this, the storesipcause option in sip.conf is also
+ deprecated.
chan_unistim
- Due to massive update in chan_unistim phone keys functions and on-screen