diff --git a/MMDVM.ini b/MMDVM.ini
index 0e147ea..f687814 100644
--- a/MMDVM.ini
+++ b/MMDVM.ini
@@ -187,6 +187,11 @@ CTCSSThreshold=30
 CTCSSLevel=20
 KerchunkTime=0
 HangTime=7
+# AccessMode values are:
+#   0 - Carrier access with COS
+#   1 - CTCSS only access without COS
+#   2 - CTCSS only access with COS
+#   3 - CTCSS only access with COS to start, then carrier access with COS
 AccessMode=1
 COSInvert=0
 NoiseSquelch=0