diff --git a/src/ca/CAref.html b/src/ca/CAref.html
index 6d78220b3..9cf787c29 100644
--- a/src/ca/CAref.html
+++ b/src/ca/CAref.html
@@ -359,10 +359,9 @@ completely independent control systems that will share the same network. For
 instance, a site might set up an operational control system and a test
 control system on the same network. In this situation it is desirable for the
 test system and the operational system to use identical PV names without fear
-of collision. Usually the best choice is to assign new port numbers to the
-operational system and allow the test system to use the default CA
-port numbers. A site might also configure the CA port numbers because
-some other facility is already using the default port numbers.</p>
+of collision. A site might also configure the CA port numbers&nbsp;because
+some other facility is already using the default port numbers. The default
+Channel Access port numbers have been registered with IANA.</p>
 
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