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-rw-r--r--channels/chan_sip.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 414c34f19..73fece92f 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -38,6 +38,8 @@
* \todo Better support of forking
* \todo VIA branch tag transaction checking
* \todo Transaction support
+ * \todo Asterisk should send a non-100 provisional response every minute to keep proxies
+ * from cancelling the transaction (RFC 3261 13.3.1.1). See bug #11157.
*
* \ingroup channel_drivers
*