Index: main/manager.c
===================================================================
--- main/manager.c	(revision 347005)
+++ main/manager.c	(working copy)
@@ -210,6 +210,11 @@
 			<xi:include xpointer="xpointer(/docs/manager[@name='Login']/syntax/parameter[@name='ActionID'])" />
 			<parameter name="Channel">
 				<para>Channel to set variable for.</para>
+				<para>The behavior of the <literal>Channel</literal> parameter is as follows:
+				</para>
+				<para>  1) When setting a variable through an AMI action, if no channel name is provided, then the variable is global.</para>
+				<para>  2) When setting a variable through an AMI action, if a channel is provided and that channel name is valid, the variable applies to the channel.</para>
+				<para>  3) When setting a variable through an AMI action, if a channel is provided and the channel name is not valid, an error message should be sent back.</para>
 			</parameter>
 			<parameter name="Variable" required="true">
 				<para>Variable name.</para>