OT, but electronic

Hi, If you know about Hayes modem protocol, you can run tests. Google it. Does your PC sees the modem at least? Can you dial into it from yoyr cell phone, etc. to see what happens.

9600 baud was the first standard, right?

I guess you have removed and then installed the modem drivers again. Do the same with the COM ports in device manager and reboot.

Can you flash the modem EPROM? Check for a current flash software.

Check the phone line plug on the modem and ensure there is not a bunch of dust affecting the line connection at the wall and modem. If so, blow out with canned air.

Line noise can determine the quality of the connection speed for a modem.

Disable COM ports 2,3 and 4 until you get COM 1 working - my guess or check the BIOS to ensure the COM ports are enabled.

I take it you moved these modems from one machine to another.

Pull all but one, get it to work and then move to the next one.

Use the Hayes modem protocol to send commands to the modem, as mentioned by Tony. (send the command to turn the speaker on so you can get an idea of what is going on). You can do this in Hyper-Terminal under Accessories > Communication.

-- Oren

..through the use of electrical or duct tape, achieve the configuration in the photo..

That took me back a few days :-)

I just remembered ATDT.

-- Oren

..through the use of electrical or duct tape, achieve the configuration in the photo..

Pick up the phone and listen for noise. Punch a number to get the dial tone to stop. Have you had rain recently? Water getting into the lines can promote noise which kill modem performance

Not right. I have some information on modem standards and rates, copied from a computer magazine:

Bell 103J (US) - 300

Bell 212A (US) - 1200

ITU V.21 - 300

ITU V.22 - 1200

ITU V.22bis - 2400

ITU V.23 - 1200 / 75

ITU V.32 - 4.8k 7.2k 9.6k

ITU V.32bis - 4.8k 7.2k 9.6k 12k 14.4k

ITU V.32ter - 14.4k 16.8k 19.2k

ITU V.34 - 4.8k 7.2k 9.6k 12k 14.4k 16.8k 19.2k 21.6k 24k 26.4k 28.8k

ITU V.34+ - 4.8k 7.2k 9.6k 12k 14.4k 16.8k 19.2k 21.6k 24k 26.4k 28.8k

31.2k 33.6k

ITU V.90 down - 33.3k 37.3k 41.3k 42.7k 44k 45.3k 46.7k 48k 49.3k

50.7k 52k 53.3k 54.7k 56k 57.3k ITU V.90 up - 4.8k 7.2k 9.6k 12k 14.4k 16.8k 19.2k 21.6k 24k 26.4k 28.8k 31.2k ITU V.92 down - (same as V.90 down) ITU V.92 up - 28k 29.3k 30.7k 32k 33.3k 34.7k 36k 37.3k 38.7k 40k 41.3k 42.7k 44k 45.3k 46.7k 48k [snip]

Boy that brings back old times. PCjr with a blazing 300. I was SOO stoked when I upgraded to 1200 and 2400 was the absolute greatest thing that happened.

>

I jumped in at 14.4k, cost hundreds back then. US Robotics 14.4k.

I just never knew how fast I really was then - given 300 - :-))

-- Oren

..through the use of electrical or duct tape, achieve the configuration in the photo..

I have a salvaged set (keepers) of RAM. Four 1/4 meg sticks, equals

1MB of RAM. You guys are old .

-- Oren

..through the use of electrical or duct tape, achieve the configuration in the photo..

Hmmm, I remember acoustic modem you used to stick onto phone handset, LOL!

The first modem I had was 300 baud. It had a cradle for the handset. :)

I'm not that old or experienced then, but this is funny!!

Gotta change the 5.25 floppy to run spell checker... 2MB RAM. Maybe those days were DOS 2 - 3.x.

How did you ever survive :-) ?

-- Oren

..through the use of electrical or duct tape, achieve the configuration in the photo..

Nope. There were 300 baud, 110 (or was it 150?) baud, and maybe even some before those.

I still have a 1K board, about 4" by 6" from my SWTP 6800.

For that matter, I think I've got a plane of core around here someplace.

I was thrilled when I could finally afford a paper tape reader/punch.

The early stages of killing the Pony Express, heh!

-- Oren

..through the use of electrical or duct tape, achieve the configuration in the photo..

I've got 8 flip-flops and the computer that used them which I built for the science fair in 1962......each flip flop was on a PCB card about 2 inches by

4 inches...

Smarty

As I recall, my first flip-flop was based on a 6SN7.

Its just a theoretical argument. Since the latest generation of communications hardware runs in megabit speeds it will have error checking algorithms. If it doesn't receive the correct response within a number of microseconds it will try again and after X number of tries it will drop the connection as faulty. This test treshold takes less than a second. First generation modems won't pass it.