NBEMS is designed as a live operator emergency communications
system. The programs are all developed by Dave Freese, W1HKJ and his team of
software writers and support people. The software is open source and Windows,
Mac and Linux are all supported. His site also has extensive help files. A
brief description of the NBEMS components follows:
Fldigi is the modem program and is used for keyboard to
keyboard communications using a wide variety of modes including the popular
PSK31 plus RTTY, DominoEX, MT63, Olivia, MFSK, Hell, Contestia, Robust PSK
(PSKR) and others. Fldigi may be used for casual operating or, with several
complementary applications, it may be used for "serious" emergency
communications. For NBEMS, Fldigi is used with the following applications:
Flwrap is a program that is used to apply a checksum and
optionally compress messages and files for transmission by Fldigi. The checksum
is used to confirm the accuracy of the transmitted message. Received messages
are automatically saved to a file directory along with a timestamp.
Flmsg is a complete message composition system that
includes canned ICS and Radiogram forms along with generic and blank forms. It
includes the Flwrap checksum functionality. As with Flwrap, incoming messages
are automatically saved to a file directory. The option exists to automatically
open the file in the Flmsg form window and/or in printer ready html format in
your browser window.
Flrig is a rig control program that works with Fldigi.
Flarq is an ARQ message program that works with Fldigi.
There is very little interest in Flarq and it has not been updated in a long
Flamp is a program for AMP or Amateur Multicast Protocol.
An Flamp session will transmit one or more files with one or more iterations of
the transmission. Each file is broken into blocks, each of which has a check
sum. The receiving station saves the blocks that pass check sum. Successive
transmissions will fill in the missing blocks provided that the new blocks pass
the check sum. After the transmission sequence, the entire file is assembled
and may be saved.