Troubles when dialing in pulse mode.

Wed 9 Jun 1999 at 11:12:21 Roman Milukov and Oleg Pritula were talking
about Troubles when dialing a number in pulse mode..

I was temporarily absent here, so I don’t know where it all started, but I have
similar troubles :( The modem freezes when dialing a number. I’m already sick of it: E
Modem PROLINK2400VH.

RM>>> IMHO due to interference with the power supply to itself. Maybe it (+5V) on
RM>>> is connected to your momed with a thin long wire? And the capacitance at +5, +12 is normal. But at -5, -12 it’s a bit thin, of course, but not particularly so.
It’s wired up normal. + added additional ones - all the glitches remained :(

RM> (In my Acorp, +12V and -12V are not used.)
I use +5V, +12V and -12V.

[skip]

RM> Directly on the ISA connector (or very close, I don’t know how constructively you have it
there
RM> it is made) it is advisable to install power supply containers. Don't worry. For
RM> +5V
RM> - 100-470 microfarads; and for -5V - this is generally a special case - there is an op-amp in the modem itself, and I didn't put a single blocking conductor in the modem! better on the slot, 10-30 microfarads.
On my modem there are 10 micron capacitors for all voltages.
On the +5V slot there are 470 microns + two 0.1 microns, on +12v there are 0.1 microns.- doesn't matter.

RM> I’m not saying that this will definitely help you, but it needs to be done so as not to
RM> think about power supply interference.
RM>>> Right now I have exactly Acorp 33.6 (rocwell), it works quite well
RM>>> well.
Other modems work fine...

OP>> Hmm... Here EM voiced me with the idea that it might be incompatible with
OP>> my
OP>> PBX. How realistic is this? I kind of doubt it. IMHO, the reason
RM> Unlikely. BUSY doesn’t pick up for me at all - that’s incompatibility! :(
This is a big bug... It’s not very easy to emulate auto-dialing with your own hands. Although with my
dependencies it turns out even worse than yours :(
+ another VERY big problem - the modem is not always seen by the terminal. Sometimes you have to restart the terminal up to
ten times. And all such modems
in the city have such a glitch :(

RM> Yours, Roman.
Yours Alexander

[Sunday June 13, 1999] at [21:40:48] Alexander Araktcheew wrote a letter
to Roman Milukov.
They discussed the topic “Troubles when dialing a number in pulse mode.”. Let's continue
what we started...

AA> I was temporarily absent here, so I don’t know where it all
AA> started, but I
AA> have similar troubles :( The modem freezes when dialing a number.
AA> I’m already sick of it: E
AA> PROLINK2400VH modem.

Change the relay in the modem. This is the reason.

Sincerely, Felix.

[I ZX]

Sun 13 Jun 1999 you wrote here:

AA> similar troubles :( The modem freezes when dialing a number. I'm sick of it already: E
AA> Modem PROLINK2400VH.

AA> Other modems work fine...

Maybe there's a crappy transformer in it?
And push resistors into the line tried?

AA> + another VERY big problem - the modem is not always seen by the terminal. Sometimes
AA> up to
AA> you have to restart the terminal ten times. And all such
AA> modems
AA> in the city have this glitch:(

Well, this is probably connecting the modem to the computer. Have you tried buffers on addresses/data?

Total good.
Best regards Roman.

Wed 16 Jun 1999 regarding Troubles when dialing a number in pulse mode.
Felix Knajzev and Alexander Araktcheew were talking.

AA>> The modem freezes when dialing a number.
AA>> Got me already: E
AA>> Modem PROLINK2400VH.

FK> Change the relay in the modem. The reason is this.
??? Is this really because of him? How can it be so buggy?
Symptoms of my modem glitches: it may freeze after any number when dialing a
number. After that, if you pick up the phone, you hear a continuous beep, as if
it
didn’t even call...

If it’s still because of the relay, then can someone post a circuit for replacing the relay with a
pulse key? Just not a theory, but one that actually works.

Bye, Felix! Don't sneeze!
Alexander aka Arc.

RM> Well, this is probably docking the modem with the computer. Have you tried buffers on addresses/data
RM>?
The buffer is for both data and address... Another person has it connected
without them - the same problems...
It became better after connecting a 1k resistor and
a 47 micron capacitor to the ground to the reset signal of the modem. It would have been worse without them... This glitch was present on three modems of this type.

Bye, Roman! Don't sneeze!
Alexander aka Arc.

Fri 18 Jun 1999 you wrote here:

AA> If this is still due to the relay, then can someone post a circuit for replacing the relay with a
AA> pulse switch? Just not a theory, but one that actually works.

I was looking at my modem for replacing the electromagnetic relay with an
electronic one - it rattled a lot. I gave up on this idea - mine has 2 switching groups, it's a pain in the ass. I just unsoldered it and “silenced it.”
And if you feel the urge to change it, I’ll install something like RES-60 at 5V. The key transistor in my modem is separate and healthy.
Felix Knajzev recommends installing a reed switch (even a home-made one).
In short, no one here will definitely advise you, look at your modem yourself.

AA> replacing the relay with a

Reed relay can be assembled by yourself in ~1 hour. With a normal
hand configuration, it will work *no worse* than the branded one, and
its appearance will not frighten others. +Small bonus -
you can always replace the reed switch.

Option #1:
===========

You take a ready-made reed relay RES-64A (or with the index 'B').
Suitable only with passports: RS4.569.724, RS4.569.724-01,
RS4.569.744. As a last resort, you can try the following passports:
RS4.569.725, RS4.569.725-01, RS4.569.745

You put it in place of the 'native' one. It is larger in size than the 'original' relay. Therefore, create, invent, try. ;) That's it.

Option #2:
===========

Assemble a homemade relay. What will be required for this?

1. Reed switch (bulb diameter preferably 2.85 mm or less)

2. Winding wire in enamel insulation with a diameter of 0.09 or 0.1
mm.

3. Four-section frame from IF circuits (color block) of color TVs
3-4th generations. Distinctive
feature: it has a hole 8-) for a 2.8 mm trimmer.

4. Hand drill. (To speed up [simplify] the winding process).

5. A certain amount of gray hair (constant wire breaks
during winding)

Processing:
===========

1. We fix the frame of the inverter in the drill chuck on the side where the thread for the 'head' (what a horror!) of the trimmer is located(the former!
trimmer must be removed. Its place will later be taken by a reed switch.).

2. We sequentially wind the wire 'to the edges' (!) in all
four sections of the frame. The ideal wire diameter is 0.09 mm!
(It is at this point that you will gain gray hair, which, as you know, adorns a
man)

3. We fix the ends (hmm... and this happens...) of the wires to the contact pins
of the frame (by soldering ;).

4. Using an ohm meter, we check the resistance of the resulting coil for direct current. It should be something around 100 Ohm.

5. Using a sharp knife, cut off the end (perhaps I won’t say anything...)
of the frame with threads for the trimmer, i.e. the one that
You clamped (???!!!) in the drill chuck. This is to reduce the size of the future relay. If you are tired of “cutting ends,” then
you can refuse this labor-intensive (and bloody) operation.

6. We insert (oops!) the reed switch into the hole (please note - I began
correcting myself - not into the hole, but into the hole!) of your newly made (do not
do it verbatim!) coil.

7. Carefully (!) we bend the reed switch leads under the holes in the board
of your modem (the reed switch is the two outer contacts, the winding is the two
internal ones!) and solder the whole thing. First
it is necessary to solder a 100-150 ohm resistor into the gap in one of the ends (again?!) of the relay winding (to increase the DC resistance. For a 'native'
relay this value is usuallyis in the region
400-600 Ohm! Less - it can burn out the transistor switch for controlling the relay in some kind of 'cockroach' [chip] of your modem).

8. Well, that's all the sex of this process... Turn on the modem and enjoy... No,
THIS is later! And now - the work done.

19 Jun 99 13:05, Roman Milukov wrote to Alexander Araktcheew:

RM> if you feel like changing it, I’ll put something like RES-60 at 5V. The key transistor
RM> in my modem is separate and healthy. Felix Knajzev
RM> recommends installing a reed switch (even a home-made one). In short, here you are

In the Soviet (made in USSR) modem there is a RES-55 however... Just
with switching contacts. IT'S BETTER NOT TO TURN ON PULSE DIALING --
YOU CAN GO DEaf. And what are the problems, tone dialing is faster
and quieter...

Kirill Frolov. [ZX]

18 Jun 99 20:35, Alexander Araktcheew -> Felix Knajzev:

AA> If this is still due to the relay, then would someone throw in a circuit for replacing the relay
AA> with a pulse key? Just not a theory, but one that really works.

╔═ ═════ ═════ ═════ ═╗
█ 1 █ 4 █ 6 █ 8
│ ┌───────────┐ │ │
║ └─▌4 5▐─┘ │ ║
║ │ │ │ ║
┌───▌3 6▐─┬──────────────┘
┌┴┐ │ KR293KP9B │ │
470 Ohm│ │┌─▌2 7▐─┘
└┬┘│ │ │ ║
└─│─▌1 8▐─┐ ║
│ └───────────┘ │
█ 16 █ 13 █ 11 █ 9
╚═ ═════ ═════ ═════ ═ў
────────────────┐ ^ ^
│ Mounting Place
Switches │ View from the parts of the hole for the relay
│ _microcircuit_on_the_back_

The relay is desoldered using suction very simply. Sucked off the soldershook the legs with tweezers, and this Chinese crap falls out without any extra effort. Soldering iron 25
watt.
The current consumption for me turned out to be 4.86 mA, so the resistor is 0.125 watts at the most
time.

RES-55A and RES-55B

Maximum switched current 0.25A at a voltage of 180 Volt

RES-55: Operation. Holiday R winding U nominal
RES-55A (RES-55B) no more no less Ohm Volt
RS4.569.604 (.629) 2.5 0.3 67 5.0
RS4.569.609 (.634) 2.1 0.25 67 5.0

PC4.569.603 (.628) 3.25 0.35 95 6.0
PC4.569.608 (.633) 2.75 0.3 95 6.0

PC4.569.605 (.630) 1.7 0.2 35 3.0
RS4.569.610 (.635) 1.5 0.18 35 3.0

Leg spread y RES55A:
_________________
1__! !__4
2__! *6 !
3__!_________________!__5

1 and 3 - winding (control contacts), they have a resistance of 60 - 100
Ohm, depending on the accuracy of application and the manufacturer.
2 and 5 - line switching control contacts, when 1 and 3 are not control
voltage they are /*open*/.
2 and 4 are the same as (2 and 5).
4 and 5 are the same as (2 and 5), only when there is no control voltage on
1 and 3, contacts 4 and 5 /_closed_/.

In solder this isrelay, look how quietly it works! And then guess, do you need reed caps or not? But if you want, then you need to look for a reed relay with an operating voltage of 5 volts!!! This can be found in any technical reference book on RELAYS. Glad to help!!!
Sincerely, SP/PoS.

25 Jun 99 01:05, Konstantin Samoylov wrote to Alexander Araktcheew:
KS> ┌┴┐ │ KR293KP9B │ │

KS> Leg spread y RES55A:

I realized what is being replaced Relyushka, why ^^^ microcircuit?

Kirill Frolov. [ZX]

KF> I realized that the relay is being replaced, but why ^^^ a microcircuit?
This is not a microcircuit, but an optronic switch, it works more silently than a relay. ;)

Sincerely, SP/PoS.