Jerome wrote,
>Copper pairs (telephone line) can only handle 30kbps.
Not quite true.
Using some trick new technology, the phone company can get you
quite a bit higher kbps (ADSL/DSL), but of course, much like ISDN,
you will need a new modem.
Copper lines that go through much of the tel co's equipment have
lousy bandwidth, and noise, which at best limit the phase coherancy in
the modulation detection of the modem signal, which makes analog
links above 56K impossible, and links above 33K very persnickety
about line quality.
>And remember, that's k_b_ps, or bits. A bit is only 1/8 of a byte.
>On a quiet (wee hours) 56k Frame Relay line (dedicated 56k) I get a max of
>7kbps from anywhere.
Actually when it comes to a conventional modem, 10 bits are transmited
per byte, a start bit, 8 data bit and a stop bit.
This gets you to a true best case transmition rate of 5.6 KBytes per sec
when using a 56k modem with a 56k link.
Occasionally we see 7kbps show on the status display in our browser,
which is showing a figure higher than the actual modulation rate, due
to compression/decompression of the data before it enters the tel lines.
Just some minor clarifications.
Jarrid Gross
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