23 Jul
1998
23 Jul
'98
7:32 a.m.
I think it's dead.
I plugged it in, turned it on, and the Power light comes on,
about 1/2 second later. regardless of what it's plugged into or
not, the Carrier light comes high.
I have an old style phone, I dialed out rack (I think the modems will
go down to 300 baud...) waited for the 1st ring and shoved it in the coupler.
No dice.
What is one supposed to do with these?
-------
23 Jul
23 Jul
8:07 a.m.
New subject: PDP-8 in the UK
It's probably already gone, but it couldn't hurt to check:
<<
I just found the attached note in my in-box; please contact
jim.raw(a)synpac.co.uk and not me if you're interested in this!
-- attachment --
| I am about to take out of commision two PDP 8E's and a PDP 11/34
| They have been used to control the production of penicillin in a KENT
| K 70 process control system
|
| I have twoo 16 K stacks of core memory, and several 4k and 8k stacks
| Additionally I have developed and built 32k stacks of RAM memory with
| DMA access from a Motorala 68000 chip set
|
| ANY INTEREST
| Jim Raw
>
-- Doug
8:12 a.m.
I think it's dead.
I plugged it in, turned it on, and the Power light comes on,
about 1/2 second later. regardless of what it's plugged into or
not, the Carrier light comes high.
I have no experience with acoustically-coupled modems, but here goes anyway.
That may be a customizable setting of the modem (you can force modern modems
to always assume a carrier, I believe).
I have an old style phone, I dialed out rack (I think
the modems will
go down to 300 baud...) waited for the 1st ring and shoved it in the coupler.
No dice.
Is there a VOICE/DATA switch somewhere? (Now that I think about it, this
doesn't make sense if the modem always assumes carrier, but it's worth a shot
I suppose.)
That switch would be used on combination voice & data lines (you call --
your friend answers -- you both agree to start the data connection -- you flip
the switch and your friend does the same).
-- Derek
8:22 a.m.
On Thu, 23 Jul 1998, D. Peschel wrote:
Is there a VOICE/DATA switch somewhere? (Now that I
think about it, this
doesn't make sense if the modem always assumes carrier, but it's worth a shot
I suppose.)
Voice/data switch !!??!? Its an acoustically coupled modem! If you want
to go voice you would pick the receiver back up!
Sam Alternate e-mail: dastar(a)siconic.com
-------------------------------------------------------------------------------
Ever onward.
September 26 & 27...Vintage Computer Festival 2
See http://www.siconic.com/vcf for details!
[Last web page update: 07/21/98]
9:50 a.m.
On Thu, 23 Jul 1998, Daniel A. Seagraves wrote:
I think it's dead.
I plugged it in, turned it on, and the Power light comes on,
about 1/2 second later. regardless of what it's plugged into or
not, the Carrier light comes high.
I have an old style phone, I dialed out rack (I think the modems will
go down to 300 baud...) waited for the 1st ring and shoved it in the coupler.
No dice.
You should be able to check half of it fairly easily. Connect it to your
PC, bring up your favorite comms program, and tell it to dial a number.
You should be able to hear it in the telephone microphone end of the
coupler. If you cannot, either you have some wires crossed or that part
of it is dead. If OK, you may be able to devise some similar test in
reverse to test the other channel.
- don
10:05 a.m.
[Tell it to dial...]
This is an accoustic coupler. It has no command language, and it can't dial on
it's own.
-------
10:58 a.m.
On Thu, 23 Jul 1998, Daniel A. Seagraves wrote:
[Tell it to dial...]
This is an accoustic coupler. It has no command language, and it can't dial on
it's own.
-------
Sorry, brain fade! What I meant to say is to tell your comms program
pulse dial a number. Or, if you prefer, tell it to send a file to the
coupler. As I said before, you should hear something unless you have
your wires crossed or it is broken.
- don
10:04 a.m.
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1:52 p.m.
On Thu, 23 Jul 1998, Tony Duell wrote:
By convention, the modem that starts - originates -
the call uses the
originate tones. This is not required - it's just a convention. But it
means that cheaper accoustic couplers that were used to dial in to a
central mainframe were often originate only.
So, try making your modern modem send answer tones. I forget how to do
this using Hayes commands, but I know it's possible. Then try it.
ATA will tell the modem to go off-hook and emit a carrier (ie. answer an
incoming call).
Sam Alternate e-mail: dastar(a)siconic.com
-------------------------------------------------------------------------------
Ever onward.
September 26 & 27...Vintage Computer Festival 2
See http://www.siconic.com/vcf for details!
[Last web page update: 07/21/98]
9650
days inactive
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days old
9 comments
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participants (6)
-
ard＠p850ug1.demon.co.uk -
dastar＠ncal.verio.com -
donm＠cts.com -
dpeschel＠u.washington.edu -
DSEAGRAV＠toad.xkl.com -
yowza＠yowza.com