+our $field_delimiter = '|'; # Protocol Default
+# The message terminator for a SIP message is '\r' in the standard doc
+# However most sip devices in the wild send a CR LF pair
+# This is required by Telnet if that is your carrier mechanism
+# On raw connections it may also be required because the buffer is
+# only flushed on linefeed and its absence causes enough delay for
+# client machines to go into an error state
+# The below works for almost all machines if however you have one
+# which does not like the additional linefeed change value to $CR
+Readonly my $msg_terminator => $CRLF;