• Subject: Re: SLIP Connection and KFLEX modems
  • From: "Carl Galgano" <cgalgano@xxxxxxxxxxxxxxxxx>
  • Date: Sat, 18 Jul 1998 11:47:27 -0400

Tim:
I agree with you also.  But I think this may only be true for ASYNC line
descriptions on the AS400 as well as ASCII devices attached to an ASCII WSC.
I have tried (even though the documentation says on 19.2 is supported) to
config an ASYNC line to 38.4 for a SLIP connection and the AS400 will not
talk to the modem , no initialization, no nothing.  On a SYNC line, either
BSC or SDLC, I think that perhaps the modem speed parameter does not matter.
Regards,
Carl

Carl Galgano
EDI Consulting Services, Inc.
http://cgalgano.home.mindspring.com
mailto://cgalgano@ediconsulting.com
(770) 422-2995

-----Original Message-----
From: Tim McCarthy <twmac@mindspring.com>
To: MIDRANGE-L@midrange.com <MIDRANGE-L@midrange.com>
Date: Friday, July 17, 1998 5:02 PM
Subject: RE: SLIP Connection and KFLEX modems


|At 12:42 PM 7/17/98 -0600, you wrote:
|>I believe the only time the linespeed is used is so performance tools
|>can calculate the line utilization percentage.
|>Apart from that, as you say it's just a comment.
|>
|Not true. The line speed on the line description on V24 ports DOES limit
|and control the transfer rate. You can test this out by setting your modem
|speed to follow DTE (most defaults do this) and you'll notice the connect
|speed change if you adjust the AS400 line speed (again assuming your modem
|is not set to return a fixed connect rate). This was an important setting
|prior to RISC where the only flow control settings available for async data
|transfers was XON/XOFF. In these cases you had to watch for matching
|DTE/DCE speed settings or risk modem buffer overflow where you'd lose data.
|
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