2 Nov
2014
2 Nov
'14
11:05 p.m.
Ahhh nice to have the lust back!
About a year ago I "rescued" a whole rack of these modems off the side of
the street. Unfortunately, they do not come with ANY documentation and my
Google fu has so far determined that they are most likely for leased lines
only.
Does anyone have any info or familiarity with this modem? I know some other
IBM LL modems could work over PTSN but had to be set in the right mode. Can
this be done for these modems? Also does anyone know if these modems will
accept standard Hayes AT commands? Or just the IBM command set? Which brings
me to my next question what is the IBM command set?
Any documentation or guidance is very much appreciated. I would love to get
these guys up and running!
-Ali
1:24 a.m.
On Sun, 2 Nov 2014, Ali wrote:
Ahhh nice to have the lust back!
. . .
accept standard Hayes AT commands? Or just the IBM command set? Which brings
me to my next question what is the IBM command set?
Did IBM ever make anything Hayes compatible?
I remember when THAT idea was funnie than getting the lust back!
1:43 a.m.
Did IBM ever make anything Hayes compatible?
I remember when THAT idea was funnie than getting the lust back!
Ahhh Fred - What is so funny about having lust back? Having the list back is
good as well ;)
As to your question: the IBM 7855 supported standard Hayes commands. On the
lower end the MWave modems, the internal 2400 (XT era), and one of the 5140
modems did as well IIRC. Of course I am far from being an expert.
-Ali
9:20 a.m.
Does anyone have any info or familiarity with this modem? I know some other
IBM LL modems could work over PTSN but had to be set in the right mode. Can
this be done for these modems? Also does anyone know if these modems will
accept standard Hayes AT commands? Or just the IBM command set? Which brings
me to my next question what is the IBM command set?
Any documentation or guidance is very much appreciated. I would love to get
these guys up and running!
Unfortunately I don't have anything on these particular modems. However, I do
have a couple of leased line modems (Nokia I think) which were abandoned by the
telecoms provider when the lines were ceased. They were both set up to be
clocked from the telco end, presumably to stop the customer from changing the
clock speed to see if their line would work at a faster rate than they were
paying for.
Amazingly, one had a little plastic folder glued on the top containing a
booklet showing how to run the self tests and what the jumpers did so I was
able to change the settings on one of them to provide the required clocking.
When I joined them with two pairs of wires, they seemed happy enough to talk
to each other.
If you want to use your modems on the PSTN, the first thing to check is whether
they require a single pair connection between them or two pairs. My ones
have RJ11 type connectors which might give the impression that only a single
pair is required but two of the pairs are actually used, one for transmit and
the other for receive.
It is also possible that your modems are synchronous only which will be a
problem if you want to talk to asynchronous only modems.
Regards,
Peter Coghlan.
9:20 p.m.
If you want to use your modems on the PSTN, the first
thing to check is
whether they require a single pair connection between them or two
pairs. My ones have RJ11 type connectors which might give the
impression that only a single pair is required but two of the pairs are
actually used, one for transmit and the other for receive.
Peter,
Not quite sure as how I would determine this. One of the questions I have is
if these modems support Hayes AT commands. In quick testing they do not seem
to (at least as configured). If they don't then they become pretty much
useless. If they at least support Hayes commands one could do further
testing and even set them up to be used locally (in house). I am surprised
no one has ever run across these guys. I may have to hit up Usenet and the
modem groups in there for some help
It is also possible that your modems are synchronous only which will be
a problem if you want to talk to asynchronous only modems.
The only information I have found is at the following link:
http://www.cbronline.com/news/ibm_announcements_2_2
Namely: "There are two and four port models with fan-in/fan-out and/or data
multiplex functions for both synchronous and asynchronous data terminal
equipment to share the same link". I am guessing they can work
asynchronously....
-Ali
11:07 p.m.
If you want to
use your modems on the PSTN, the first thing to check is
whether they require a single pair connection between them or two
pairs. My ones have RJ11 type connectors which might give the
impression that only a single pair is required but two of the pairs are
actually used, one for transmit and the other for receive.
Peter,
Not quite sure as how I would determine this. One of the questions I have is
if these modems support Hayes AT commands. In quick testing they do not seem
to (at least as configured). If they don't then they become pretty much
useless. If they at least support Hayes commands one could do further
testing and even set them up to be used locally (in house). I am surprised
no one has ever run across these guys. I may have to hit up Usenet and the
modem groups in there for some help
It is also possible that your modems are synchronous only which will be
a problem if you want to talk to asynchronous only modems.
The only information I have found is at the following link:
http://www.cbronline.com/news/ibm_announcements_2_2
Namely: "There are two and four port models with fan-in/fan-out and/or data
multiplex functions for both synchronous and asynchronous data terminal
equipment to share the same link". I am guessing they can work
asynchronously....
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7 comments
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blstuart＠bellsouth.net -
cctalk＠fahimi.net -
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