Re: how fast are Mod 170 comm ports

[Larry Bolhuis <lbolhuis@xxxxxxxxxx>]

> The AS/400 RS232/V24 ports max out at 19.2kbps. No modem, no matter
> how fast will be able to talk to your 400 at a faster bitrate than
> that. For higher speeds you need to use a different interface (X.21 or
> somesuch.)

  Um, that IS what the book says, but fortunately the AS/400 can't read.
I was told by an source withing Rochester that this limit was to achieve
certain FCC ratings.  Of course it also means that when you exceed it,
they won't support it.

  I have Often run 56K and 64K on these ports with nary a hitch.  On the
newer PCI hardware I have run 115,200 and I think that may actually be a
supported speed now. Although I can't find ANY reference to max speed in
the system handbook.

  With the USR modems (I prefer the Courier for reliability and best
connectivity) I set the port to 57,600.

  FYI I support a customer with a 240 digital modem pool.  The best
speed we have EVER seen was about 50K with the average probably below
40K.  It DOES matter what modem you are dialing in with too. Those
crappy $15 WinModems supplied with most PC's don't get the highest
speeds. In fact the same customer has 32 analog (USR courier) modems
because some cheap modems won't even connect to the V.90 modems! You get
what you pay for.  Also remember the high speed is download only,
uploads will never exceed 33.6K.

  HTH - Larry

-- 
Larry Bolhuis         |  
Arbor Solutions, Inc  |  IBM AS/400e - Get There First!
(616) 451-2500        |  
(616) 451-2571 -fax   |  It's 10PM.  Has your NT Server had it's
lbolhuis@arbsol.com   |  theraputic re-boot yet today?
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