What is a POTS codec -
and why is it called 'POTS'?
A POTS codec allows live connections - in the same
way as an ISDN codec - but is designed to work over a standard telephone
line. Audio is compressed and then sent and received as data over
the phone line to offer a broadcast quality connection. POTS codecs
can be used in areas where ISDN service is unavailable, or where
you just need to get on air fast! As to the name: In telecom engineers
lingo, POTS stands for Plain Old Telephone System.
What kind of quality can
The exact audio quality depends on the quality of
the phone line. Most connections will give you about 7.5 kHz audio
quality, which is good reporter quality speech. This is about the
same audio bandwidth offered by the G.722 algorithm in ISDN codecs.
How reliable is AudioTX
AudioTX POTS has been designed to be used by broadcast
professionals and so provides stable, reliable, live audio connections.
Where line quality deteriorates, POTS detects this and steps down
the data transmission rate. Where you have made a test call and
see that the line quality is less than ideal, you can limit the
highest data rate that the software should try.
Does AudioTX POTS work
for international calls?
Yes. You should try a test connection first to see
what the line quality is like. If necessary, you can then limit
the connection speed as above to get a safer connection. Generally,
most countries' phone systems are now good enough to give a high-quality
What about mobile phones?
Ordinary GSM or analog mobile phones offer very
low data rates - around 9600bps - this is too low to get a good
connection. However in many countries, phones and networks which
support high-speed GSM, or other fast data connections, provide
data rates comparable with standard fixed phone lines - between
30 and 40 kbps. These are ideal for use with AudioTX POTS... all
you need is a modem or cable that allows you to use your mobile
phone's data capability.
What type of modem do I
need to use AudioTX POTS?
Any good quality PC modem should work - a PCI, PCMCIA
or USB modem is best though we have also tested some external serial
Some SoftModems (sometimes called WinModems) do
not work, and if you are buying a new modem for POTS, we suggest
that you avoid these.
What's the coding delay?
Depends on the modem, but approximately the same
as an ISDN codec.
Is AudioTX POTS compatible
with other POTS codecs?
No. The manufacturers of POTS codecs all use their
own proprietary coding algorithms, so AudioTX POTS, in common with
the others, is not compatible with other units.
are there in the trial version?
The trial version runs for 30 days, and each time
you start the application, it will run for one hour - you can then
restart the program to continue testing. Additionally, each connection
is randomly disconnected after between 3 and 30 minutes.
OK, I'm convinced... How do I
You can buy AudioTX directly using our online ordering
system. There are two purchase methods:
1. Hardware dongle - This is the preferred option
as you can use the dongle on any PC... for example should there
be a fault with your PC, all you need to do is move the dongle to
another machine and you can continue working. The dongles are available
in two versions - USB and LPT. Each is a small piece of plastic
that connects to your PC or Laptop's USB or Printer port and must
be in place whenever you use AudioTX POTS.
2. Software unlock code: make
a note of the 'Product ID' which is shown on starting the demo version
on the PC for which you wish to buy a license. Use this to purchase
Communicator online from this site. You will be emailed a registration
code - this normally takes only a few minutes. Enter the registration
code into the registration screen shown at startup. This is a registration
key which you can use to unlock the software on the PC from which
you took the Product ID ONLY. If you change your PC or decide to
(or have to) change major hardware components inside your PC like
your hard drive (say if it crashes) or motherboard, you will have
to purchase another key. Reinstalling or upgrading the operating
system or other software changes do NOT normally cause a problem,
but you do so at your own risk.