Iron --==< Refinement modem >==-- 05
(C) Hamer MDM 221-8365
I welcome all readers of the new dial-up newspaper LPRINT.YA
want talk about finalizing the C-DOS modem, called the people
Relyushka. So, on board modem is 1 megohm resistor, which
creates pressure in the line for what would be the server
responds to zvonok.Tak here, if it decreases, then the server
will respond better to the challenge Subscriber / I is 500 k /,
but the quality will deteriorate communication. For that would
not happen, you need at a time when the "tube" on the modem is
raised - to disable this rezistor.Etim and engaged
Relyushka.Risunok shows a fragment of boards, where there is a
socket for telephone line:
\ / O
Vypayany resistor
want to
disconnect
o
Relyushka
The board
o o
o o o
View from the side o o
Boards o o o
/ It was / second Relyushka
view from the findings
If Relyushki refuse to operate together, then they will need to
bridge the series and powered by 12 volts. So, for example, is
made in Lam'y:
Cut the track from the +5 V / such a long /
Serial connection Relyushek
o o
\ / O o o <-
x between the relay and transformer
a diode, which must vypayat
o o
o o o At Cutter
+12
Now the theory: the second Relyushka working on breaking the
chain, ie in the initial state / when the "tube" to put or her
contacts in the circuit resistors are closed and so it is
enabled. When picked up tubes - she works with Relyushkoy on
the board and breaks resistor chain, which now does not spoil
ties. Relyushka set is the same as on the board: REF 49 with
the supply voltage 6V.
WW: Thank you very much Hamer'u for its refinement, I hope now
problemma with removal of the modem pipe, will disappear. By
the way rumor has it that there is a scheme for "recognition"
signal from the noise of telephone lines during the
transmission of information. Maybe I am somewhat well
formulated, but I think the idea is clear. Would love to see
this scheme / da, and other useful improvements / the pages of
our newspapers.
