On 26/10/2018 20.50, Dave Howorth wrote:
On Fri, 26 Oct 2018 20:42:22 +0200 "Carlos E. R." <robin.listas@telefonica.net> wrote:
On 26/10/2018 19.45, James Knott wrote:
On 10/26/2018 01:29 PM, Knurpht-openSUSE wrote:
This was at a conference where we just heard that 1Mbit/sec accross copper telephony cables was not technically impossible ( where the market said it was ).
????
A T1 line could carry 1.544 Mb over 2 pairs, back in 1962, well before there was such a thing as Unix.
https://en.wikipedia.org/wiki/T-carrier#Transmission_System_1
Yes, but a T1 was a coaxial cable, designed to carry that speed, whereas a telephone copper pair was designed, if it was at all designed, to carry voice.
What almost everybody thought, was that it was impossible to carry 1 Mb/s on those POT lines as they were.
With all respect to everybody, 1.544 Mbps over two pairs is less than 1 Mbps per pair, s I'm not sure where the argument is, nor why it's worth discussing, especially on the support list rather than offtopic.
Two pairs? Ah, two T1 lines. Coaxial lines. But they carried 1 Mbit on each. 1.544 Mb/s, or 2 Mb/s on E1, on each direction. -- Cheers / Saludos, Carlos E. R. (from 42.3 x86_64 "Malachite" (Minas Tirith))