use warnings;
use English;
use Exporter;
+use Readonly;
use Sys::Syslog qw(syslog);
use POSIX qw(strftime);
our $error_detection = 0;
our $protocol_version = 1;
-our $field_delimiter = '|'; # Protocol Default
+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 => $CRLF;
# We need to keep a copy of the last message we sent to the SC,
# in case there's a transmission error and the SC sends us a
if ($file) {
$file->autoflush(1);
- print $file "$msg\r";
+ print $file $msg, $msg_terminator;
} else {
STDOUT->autoflush(1);
- print $msg, "\r";
+ print $msg, $msg_terminator;
syslog("LOG_INFO", "OUTPUT MSG: '$msg'");
}