diff --git a/funcs/func_channel.c b/funcs/func_channel.c
index afe9796f6d..39d7499c78 100644
--- a/funcs/func_channel.c
+++ b/funcs/func_channel.c
@@ -208,6 +208,30 @@ ASTERISK_REGISTER_FILE()
R/W whether or not context tracing is enabled, only available
if CHANNEL_TRACE is defined.
+
+ R/W returns the channel responsible for hangup.
+
+
+ R/O returns the internal application name.
+
+
+ R/O returns the application data if available.
+
+
+ R/O returns the extension for an outbound channel.
+
+
+ R/O returns the context for an outbound channel.
+
+
+ R/O returns the channel name for an outbound channel.
+
+
+ R/O returns the channel uniqueid.
+
+
+ R/O returns the linkedid if available, otherwise returns the uniqueid.
+
chan_sip provides the following additional options: