Michelle Konzack wrote:
Am 2008-05-06 08:51:59, schrieb Bob Estes:
Bit? Bytes?
Is a bit a small bit of a byte or is a byte just a small bite from a
bit??? Or maybe a bit is past tense of a byte??? Technology! Grrrrr
<grimace>
Basicly, a Byte is eight Bits.
------------------------ END OF REPLIED MESSAGE ------------------------
...and do not forget, that you have a START and a STOP Bit which mean,
a 56 kBit has 57344 Bit per second but can transfer only 45875 Bits or
44,8 kByte per second.
This real data traffic is called BAUD.
BAUD defines the mapping of audio signal changes to the number of bits
represented by each change. It is undefined in the digital realm. The
term has been misused for years now.
Note: Additional to the STOP and the START Bit you can have
additional bits and a STOP bit can have 1 1/2 time of
the normal lenght...
Thanks, Greetings and nice Day
Michelle Konzack
Modern modems don't use start/stop bits in the audio side data stream.
They do synchronous signaling with a packet wrapper, much like Ethernet.
Most of them also have FEC or ECC built in to recover errors. The total
overhead is way less than two bits per octet. The start and stop bits
are only present in the digital signal to/from the serial ports, which
has much higher data speed than the audio link. We have come a long way
from the Bell 202 and 212 days.
Bob McConnell
N2SPP
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