cheako@arcadia:~$ perl
warn unpack("B620",pack(
'B8 C3 N10 B32',
          '00100011',
          '0',
          '0',
          '0',
          '0',
          '0',
          '0',
          '0',
          '0',
          1425691777,
          761152,
          '0',
          '0',
          1425691777,
          761152
));
00100011000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
01010100111110100101010010000001
00000000000010111001110101000000
00000000000000000000000000000000
00000000000000000000000000000000
01010100111110100101010010000001
10111000000000000000000000000000 at - line 1.

Different output, but identical input :/.

cheako@arcadia:~$ perl
warn unpack("B620",pack(
'B8 C3 N11',
          '00100011',
          '0',
          '0',
          '0',
          '0',
          '0',
          '0',
          '0',
          '0',
          1425691777,
          761152,
          '0',
          '0',
          1425691777,
          761152
));

cheako@arcadia:~$ perl
warn unpack("B620",pack(
'B8 C3 N11',
          '00100011',
          '0',
          '0',
          '0',
          '0',
          '0',
          '0',
          '0',
          '0',
          1425691777,
          761152,
          '0',
          '0',
          1425691777,
          761152
));
00100011000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
01010100111110100101010010000001
00000000000010111001110101000000
00000000000000000000000000000000
00000000000000000000000000000000
01010100111110100101010010000001
00000000000010111001110101000000 at - line 1.


cheako@arcadia:~$ perl
warn unpack("B620",pack(
'B8 C3 N10 B32',
          '00100011',
          '0',
          '0',
          '0',
          '0',
          '0',
          '0',
          '0',
          '0',
          1425691777,
          761152,
          '0',
          '0',
          1425691777,
          '00000000000010111001110101000000'
));

00100011000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
01010100111110100101010010000001
00000000000010111001110101000000
00000000000000000000000000000000
00000000000000000000000000000000
01010100111110100101010010000001
00000000000010111001110101000000 at - line 1.


##</code><code>##

my@argsforpacksend_sntp_packet=($client_li_vm_mode ,
+ $client_stratum , $client_poll , $client_precision , $client_root_de
+lay , $client_dispersion , $client_reference_identifier , $client_ref
+erence_timestamp_sec , $client_reference_timestamp_microsec , $client
+_originate_timestamp_sec , $client_originate_timestamp_microsec , $cl
+ient_receive_timestamp_sec , $client_receive_timestamp_microsec , $cl
+ient_transmit_sec , $client_transmit_microsec);  warn Dumper \@argsforpacksend_sntp_packet;
  my $send_sntp_packet = pack "B8 C3 N10 B32", @argsforpacksend_sntp_packet;
warn unpack("B384",$send_sntp_packet)