diff --git a/configs/sip.conf.sample b/configs/sip.conf.sample
index df7f1a27d9a353e46e6919f82619775bd6ba2dfd..df18aea122c61bda674d606e7f31a1b27789f24a 100644
--- a/configs/sip.conf.sample
+++ b/configs/sip.conf.sample
@@ -7,7 +7,7 @@
 ; syntaxes for dialing SIP devices.
 ;	SIP/devicename
 ;	SIP/username@domain   (SIP uri)
-;	SIP/username@host:port
+;	SIP/username[:password[:md5secret[:authname]]]@host[:port]
 ;	SIP/devicename/extension
 ;
 ;
@@ -24,6 +24,15 @@
 ; 	where the proxyhostname is defined in a section below 
 ;	This syntax also works with ATA's with FXO ports
 ;
+; SIP/username[:password[:md5secret[:authname]]]@host[:port]
+;	This form allows you to specify password or md5secret and authname
+;	without altering any authentication data in config.
+;	Examples:
+;
+;	SIP/*98@mysipproxy
+;	SIP/sales:topsecret::account02@domain.com:5062
+;	SIP/12345678::bc53f0ba8ceb1ded2b70e05c3f91de4f:myname@192.168.0.1
+;
 ; All of these dial strings specify the SIP request URI.
 ; In addition, you can specify a specific To: header by adding an
 ; exclamation mark after the dial string, like