diff --git a/configs/sip.conf.sample b/configs/sip.conf.sample
index 2c8a5e4d3376cf6abdde6a748efc38f1fb390a7f..26356db72a6be36657f033f32c43d7abb4b3b52c 100755
--- a/configs/sip.conf.sample
+++ b/configs/sip.conf.sample
@@ -13,6 +13,9 @@ context = default		; Default for incoming calls
 ;defaultexpirey=120		; Default length of incoming/outoing registration
 ;notifymimetype=text/plain	; Allow overriding of mime type in NOTIFY
 ;videosupport=yes		; Turn on support for SIP video
+;disallow=all			; Disallow all codecs
+;allow=ulaw			; Allow codecs in order of preference
+;allow=ilbc
 ;
 ;register => 1234@mysipprovider.com	; Register with a SIP provider
 ;register => 2345@mysipprovider.com/1234 ; Register 2345 at sip provider as 1234 here.