--- a/doc/Proto-SMSC-testing	Mon Nov 13 12:47:12 2023 -0800
+++ b/doc/Proto-SMSC-testing	Sat Dec 16 22:23:23 2023 +0000
@@ -59,12 +59,14 @@
 
 3) Run proto-smsc-daemon like this:
 
-proto-smsc-daemon Example-SMSC mo-sms-log /tmp/sendmt_socket
+proto-smsc-daemon 127.0.0.1 Example-SMSC mo-sms-log /tmp/sendmt_socket
 
-The first argument is the IPA name this proto-SMSC should give itself (needs to
-match OsmoHLR config), the second argument is the name of a log file that will
-be opened for writing, and the third argument is the pathname to which a local
-UNIX domain socket will be bound.
+The first argument is the IP address of your OsmoHLR instance (more precisely,
+the IP address at which OsmoHLR GSUP server can be reached; standard GSUP port
+is required), the second argument is the IPA name this proto-SMSC should give
+itself (needs to match OsmoHLR config), the third argument is the name of a log
+file that will be opened for writing, and the fourth argument is the pathname
+to which a local UNIX domain socket will be bound.
 
 Any time an MS sends MO SMS to this proto-SMSC, the message will be written
 into the line-oriented log file which you named as the second argument to