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computers / comp.sys.ibm.ps2.hardware / Re: H063688 SOME OEM MODEMS FAIL WITH 8525 AND 8530 SYSTEMS

SubjectAuthor
* H063688 SOME OEM MODEMS FAIL WITH 8525 AND 8530 SYSTEMSLouis Ohland
`- Re: H063688 SOME OEM MODEMS FAIL WITH 8525 AND 8530 SYSTEMSgfretwell

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H063688 SOME OEM MODEMS FAIL WITH 8525 AND 8530 SYSTEMS

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From: ohland@charter.net (Louis Ohland)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: H063688 SOME OEM MODEMS FAIL WITH 8525 AND 8530 SYSTEMS
Date: Mon, 12 Jul 2021 12:03:33 -0500
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 by: Louis Ohland - Mon, 12 Jul 2021 17:03 UTC

https://ardent-tool.com/docs/pdf/PS2_Model_25_Technical_Reference_Jun87.pdf

Page 134 physical

Figure 1-109. Serial Port Connector
11 N/A Tied to line 20
20 0 -Data Terminal Ready

1.2.444 SOME OEM MODEMS FAIL WITH 8525 AND 8530 SYSTEMS

Record number: H063688

SOME EXTERNAL OEM MODEMS MAY NOT WORK WITH 8525, 8525 286, 8530
AND 8530 286 SYSTEMS.

THESE MODEMS MAY REQUIRE THAT PIN 11 OF THE SERIAL PORT BE USED
FOR CHECKING SIGNAL DATA QUALITY. 8525 AND 8530 SYSTEMS HAVE
PINS 11 AND 20 OF THE SERIAL PORT TIED TOGETHER FOR DATA
TERMINAL READY.

IF THE OEM MODEM WORKS WITH MICRO CHANNEL SYSTEMS, BUT FAILS
WITH 8525 AND 8530 SYSTEMS AND HARDWARE DIAGNOSTICS PASS,
THE CUSTOMER SHOULD BE REFERRED TO THEIR APPROPRIATE
POINT OF SALE FOR THE MODEM.

UNDER NO CIRCUMSTANCE SHOULD ANY MODIFICA

Re: H063688 SOME OEM MODEMS FAIL WITH 8525 AND 8530 SYSTEMS

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From: gfretwell@aol.com
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Re: H063688 SOME OEM MODEMS FAIL WITH 8525 AND 8530 SYSTEMS
Date: Mon, 12 Jul 2021 14:00:45 -0400
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 by: gfretwell@aol.com - Mon, 12 Jul 2021 18:00 UTC

On Mon, 12 Jul 2021 12:03:33 -0500, Louis Ohland <ohland@charter.net>
wrote:

>https://ardent-tool.com/docs/pdf/PS2_Model_25_Technical_Reference_Jun87.pdf
>
>Page 134 physical
>
>Figure 1-109. Serial Port Connector
>11 N/A Tied to line 20
>20 0 -Data Terminal Ready
>
> 1.2.444 SOME OEM MODEMS FAIL WITH 8525 AND 8530 SYSTEMS
>
> Record number: H063688
>
> SOME EXTERNAL OEM MODEMS MAY NOT WORK WITH 8525, 8525 286, 8530
> AND 8530 286 SYSTEMS.
>
> THESE MODEMS MAY REQUIRE THAT PIN 11 OF THE SERIAL PORT BE USED
> FOR CHECKING SIGNAL DATA QUALITY. 8525 AND 8530 SYSTEMS HAVE
> PINS 11 AND 20 OF THE SERIAL PORT TIED TOGETHER FOR DATA
> TERMINAL READY.
>
> IF THE OEM MODEM WORKS WITH MICRO CHANNEL SYSTEMS, BUT FAILS
> WITH 8525 AND 8530 SYSTEMS AND HARDWARE DIAGNOSTICS PASS,
> THE CUSTOMER SHOULD BE REFERRED TO THEIR APPROPRIATE
> POINT OF SALE FOR THE MODEM.
>
> UNDER NO CIRCUMSTANCE SHOULD ANY MODIFICA

Just to clear a potential confusion factor. In IBM speak "OEM" means
Other Equipment Manufacturer, not Original Equipment Manufacturer.
AKA "Not Ours".

computers / comp.sys.ibm.ps2.hardware / Re: H063688 SOME OEM MODEMS FAIL WITH 8525 AND 8530 SYSTEMS

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