Re: Still trying to dial-in

On Fri, 13 Jul 2007, in the Usenet newsgroup comp.dcom.modems, in article
<1184349928.773425.82360@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, Jim Nathan wrote:

I think that's a good point. In the old days before Cable and DSL, it
was imperative that the content providers, like AOL, Compuserve,
Prodigy, etc., have modems that approached 100% relialbility. It's
hard to believe that they used the garden variety available to the
general public which were generally used for dial-out anyway.

Depends on how far back you go. In the age of up to a v34.bis (33.6)
connection, those very well could be garden variety modems - not the
US$15.99 versions, but ordinary USR Couriers as one example. When we
finally got to 56k speeds, the ISP end is a digital connection, not
a modem. The digital/analog conversion was done in the last 3-4 miles
between your central office and your phone. Google for the
Modem-HOWTO, which is a Linux Documentation Project document. Pay
attention to the stuff about the modem - you can ignore the O/S stuff.

-rw-rw-r-- 1 gferg ldp 338097 Jan 17 13:42 Modem-HOWTO

It's also possible that those providers had sophisticated telephone or
circuit switching equipment which gave the line(s) a clean, consistent
RING everytime. I've never heard this before but it makes sense.

The 'RING' is between you and your central office. The caller has
nothing to do with it. Or do you think that your little cell phone
is generating the 45 volt AC ring signal?

Anyway, regarding lowering the speed and looking at my list of AT
commands, the following command might be tried: ATS37=11. This lowers
the connection speed to 14400 bps. 10,9,8,7, etc allow for even lower
speeds.

Not needed. The two modems will negotiate a mutual agreeable speed
without user intervention.

Also, anybody know anything about Reliable mode or Auto-
reliable mode (AT commands AT\N2, AT\N3)? Comments please!

AT\N isn't a command on my USRs. That appears to be a Rockwell or
Connexant command. The response that John Dulak gives you is
referring to V42 error correction - and if I rather doubt V42 is going
to buy you much other than a higher _negotiated_ speed.

What does your on-line manual report (AT? command)?

Old guy
.

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