diff --git a/UPGRADE.txt b/UPGRADE.txt
index e5a81a98d05906474d109ac1d5aaa65e7aae5594..83c2b2b6cba299f73907c4411bf206bf49b637be 100644
--- a/UPGRADE.txt
+++ b/UPGRADE.txt
@@ -52,6 +52,9 @@ SIP
 ===
  - A new option "tonezone" for setting default tonezone for the channel driver
    or individual devices
+ - 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.
 
 users.conf:
  - A defined user with hasvoicemail=yes now finally uses a Gosub to stdexten
diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 1ea54538b4700c6922be54c8d5b50b2a98cf687f..e80d2d913b5a7e24c93146d4757bd798e1d2074d 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -26395,6 +26395,8 @@ static int check_rtp_timeout(struct sip_pvt *dialog, time_t t)
 				}
 				ast_log(LOG_NOTICE, "Disconnecting call '%s' for lack of RTP activity in %ld seconds\n",
 					ast_channel_name(dialog->owner), (long) (t - dialog->lastrtprx));
+				manager_event(EVENT_FLAG_CALL, "SessionTimeout", "Source: RTPTimeout\r\n"
+						"Channel: %s\r\nUniqueid: %s\r\n", ast_channel_name(dialog->owner), dialog->owner->uniqueid);
 				/* Issue a softhangup */
 				ast_softhangup_nolock(dialog->owner, AST_SOFTHANGUP_DEV);
 				ast_channel_unlock(dialog->owner);
@@ -26647,6 +26649,8 @@ static int proc_session_timer(const void *vp)
 				sip_pvt_lock(p);
 			}
 
+			manager_event(EVENT_FLAG_CALL, "SessionTimeout", "Source: SIPSessionTimer\r\n"
+					"Channel: %s\r\nUniqueid: %s\r\n", ast_channel_name(p->owner), p->owner->uniqueid);
 			ast_softhangup_nolock(p->owner, AST_SOFTHANGUP_DEV);
 			ast_channel_unlock(p->owner);
 			sip_pvt_unlock(p);