21 Jun
1999
21 Jun
'99
6:11 a.m.
I just picked up an Anderson Jacobson (Model: AJ1235) acoustic/direct
coupled modem. Anyone have any information on this?
QUESTION #1:
The front panel has a slide switch that is labled "Disconnect" and has ON
and OFF positions.
There is also a momentary push button labled "connect".
Now, I assume that the "Disconnect" switch is to pick-up and release the
phone line when the direct coupled plugs are used but, what does the
"Connect" button do?
QUESTION #2:
There is a 300/1200 baud switch. all of the acoustic modems I have ever
used only ran at 300 or slower. Can you run 1200 baud over an acoustic
coupled modem?
QUESTION #3:
The place I bought this at has a few more. Anyone interested?
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21 Jun
21 Jun
6:46 a.m.
On Mon, 21 Jun 1999, Arfon Gryffydd wrote:
There is a 300/1200 baud switch. all of the acoustic
modems I have ever
used only ran at 300 or slower. Can you run 1200 baud over an acoustic
coupled modem?
I had trouble with mine (back in the day) just running at 300 baud.
Everyone in the room had to be quiet, and the first time someone coughed
or sneezed, there went whatever was transferring (and sometimes the
connection). I tried all kinds of stuff to insulate the handset against
noise, with only a little success. It was heaven to upgrade that thing, so
I could finally blast Rush and Sabbath while downloading Atari ATASCII
movies...[wipes a tear]...sniff...
Aaron
7:07 a.m.
On Mon, 21 Jun 1999, Aaron Christopher Finney wrote:
Everyone in the room had to be quiet, and the first
time someone coughed
or sneezed, there went whatever was transferring (and sometimes the
connection). I tried all kinds of stuff to insulate the handset against
noise, with only a little success. It was heaven to upgrade that thing, so
I could finally blast Rush and Sabbath while downloading Atari ATASCII
movies...[wipes a tear]...sniff...
Aaron
Indeed... I have the same trouble with my Silent 700 Teletyple.. I don't
have any phones that have a round handset.. I found it's best to set some
heavy books on it to get the phone to cover the muffs well, then stuff
some tissue around it.. (no, not heavy enough books to break it, just
enough to make a good connection.) I was able to use a cordless fone with
it using this method (!)... it was fine until it either changed channels
or had a call waiting beep... lots of garbage.
Rush rocks! ... And the meek shall inherit the earth... (2112)
Kevin
-------------------------------------------------------------------------------
"It's you isn't it? THE BASTARD OPERATOR FROM HELL!"
"In the flesh, on the phone and in your account..."
-- BOFH #3
9:39 a.m.
At 12:07 PM 6/21/99 -0400, Tyran wrote:
Indeed... I have the same trouble with my Silent 700
Teletyple.. I don't
have any phones that have a round handset..
For anyone in this sad situation, I have a quantity of Northern Telecom
standard handsets (aka old touch tone telephones built like tanks to
withstand nuclear winter) that I would be happy to offer anyone on this
list if they are willing to cover postage and, if necessary, packaging
materials.
--Chuck
9:48 a.m.
Just guessing here, but intelligent guessing :-)
QUESTION #1:
Now, I assume that the "Disconnect" switch is to pick-up and release the
phone line when the direct coupled plugs are used but, what does the
"Connect" button do?
Cause the modem to issue the "ORIGINATE" tone rather than the ANSWER tone.
Usage, dial the number you want to talk to, the other modem answers, you
press connect and the modem squeals out 'Hiya cuties, how do you like these
bits?' (although to humans it sounds more like a high pitched squeal). The
other modem then answers with the ANSWER tone and you're off to the races.
QUESTION #2:
There is a 300/1200 baud switch. all of the acoustic modems I have ever
used only ran at 300 or slower. Can you run 1200 baud over an acoustic
coupled modem?
Sheesh, kids these days. Why when I was younger we used to have to whistle
the Bell 212 standard for five minutes before they would even let us use
the computer. :-) Seriously, yes there were acoustically coupled 1200 baud
modems (I've got a couple of Racal-Vadics, considered "da-best" :-) but
they weren't all that reliable. (hence all the error checking in the xmodem
protocol) 1200 baud pushed manufacturers to include the _much_ more
expensive "Data Access Arrangement" devices on the modem for direct
connection. (This was one of the most amazing things about the original
Hayes modem, it was direct connect and still pretty darn cheap.)
QUESTION #3:
The place I bought this at has a few more. Anyone interested?
If you want to keep it running your should buy a couple more yourself. The
212 model used active filters mounted on ceramic substrates that could (and
did) fail. I don't believe they were repairable without surface mount gear.
--Chuck
10:12 a.m.
On Mon, 21 Jun 1999, Chuck McManis wrote:
There were IIRC also some 2400 baud couplers (A-J I believe) and even some
9600 baud (yeh, I know, bps) units though I think they were not very
successful!
- don
Just guessing here, but intelligent guessing :-)
^\ 'Watch your mouth, buster!' or
QUESTION #1:
Now, I assume that the "Disconnect" switch is to pick-up and release the
phone line when the direct coupled plugs are used but, what does the
"Connect" button do?
Cause the modem to issue the "ORIGINATE" tone rather than the ANSWER tone.
Usage, dial the number you want to talk to, the other modem answers, you
press connect and the modem squeals out 'Hiya cuties, how do you like these
bits?' (although to humans it sounds more like a high pitched squeal). The
other modem then answers with the ANSWER tone and you're off to the races. QUESTION #2:
There is a 300/1200 baud switch. all of the acoustic modems I have ever
used only ran at 300 or slower. Can you run 1200 baud over an acoustic
coupled modem?
Sheesh, kids these days. Why when I was younger we used to have to whistle
the Bell 212 standard for five minutes before they would even let us use
the computer. :-) Seriously, yes there were acoustically coupled 1200 baud
modems (I've got a couple of Racal-Vadics, considered "da-best" :-) but
they weren't all that reliable. (hence all the error checking in the xmodem
protocol) 1200 baud pushed manufacturers to include the _much_ more
expensive "Data Access Arrangement" devices on the modem for direct
connection. (This was one of the most amazing things about the original
Hayes modem, it was direct connect and still pretty darn cheap.) QUESTION #3:
The place I bought this at has a few more. Anyone interested?
If you want to keep it running your should buy a couple more yourself. The
212 model used active filters mounted on ceramic substrates that could (and
did) fail. I don't believe they were repairable without surface mount gear.
--Chuck
9142
days inactive
9142
days old
5 comments
5 participants
participants (5)
-
a2k＠one.net -
af-list＠lafleur.wfi-inc.com -
arfonrg＠texas.net -
cmcmanis＠mcmanis.com -
donm＠cts.com