All the state of the art multi-million Euro machines in my factory
communicate using RS232. Comms problems would cause huge damages so there's
no USB.
The USB comms in my USB only HP E-PC used in my multiport Winlink PMBO
controlling 5 PTCIIPro controllers has caused multiple crashes on the comms
between PC and controllers. Obviously USB did not perform well in a high
fieldstrength environment.
I would rate the use of an 8877 and RS232 in a commercial 1500 watt HF
amplifier sound engineering practice. I am not so sure about multiple
processors in a 1500 watt box. I did not pre-order at the bargain
introduction price....
Cheers, Dick
PA3DUV
----- Original Message -----
From: "HAROLD B MANDEL" <ka1xo@juno.com>
To: <amps@contesting.com>
Sent: Sunday, September 18, 2005 2:14 AM
Subject: [Amps] RS-232
> The Cingular build-out is installing Emerson/Lorain power plants that are
> the latest of the latest
> in Cell-Site DC Power. The Monitoring, Control and Alarm computers in
> these bays have
> RS-232 ports for the commissioning techs to connect to.
>
> The Carrier Access CSU devices that mount in these bays recreate the T-1
> and channelize the
> T-1 to allow the various alarms, GPS, LMU and BTS bays to share the T-1
> line. These devices
> have just hit the market and they have RS-232 ports to allow the
> commissioning techs to hook up.
>
> The techs use a dumb terminal routine called ProComm to communicate.
> Remember ProComm
> from before the internet? We used to use ProComm to allow our computers
> to talk to BBS sites.
>
> The bays that handle the radios are made by Nokia in Finland. Each of
> these bays have two
> different RS-232 ports, but mostly the one used is connecting to the
> master controller card.
>
> In four years of doing this I've seen BTS hardware, computer hardware,
> BTS firmware,
> computer operating system, computer BIOS and SiteManager software
> changes, but the
> one feature that stays is the RS-232 port.
>
> As we approach true 3G here in America the next phase of cellular upgrade
> will be the
> UMTS technology. The Nokia BTS bays will be upgraded with newer
> controllers
> and Multi-Carrier Power Amplifiers will be added. All the UMTS bays and
> MCPA bays have RS-232 ports for commissioning and integration.
>
> We use terms like "Why reinvent the wheel?" and "If it's not broken
> don't fix it." There was a time two years ago when the Win2000 O/S
> collided with the Nokia Firmware, but that was upgraded fast.
> There was also an application where the field commissioners and
> integrators were given USB-based bar code readers to collect data,
> and that program saw many field failures when the gear didn't work.
>
> No opinions here, just observations of what is being produced
> and used out there.
>
> Hal Mandel,
> W4HBM
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