[R-390] Re: OT
Tisha Hayes
tisha.hayes at gmail.com
Fri Jan 2 23:16:15 EST 2009
"Hummm... I can not think of a time in 20 + years of being in this wonderful
communications business of EVER going to Radio Shack for a part for any
system."
---
How about when the factory should have shipped you a DB-9 to DB-25 cable but
where not all of the lines are terminated at the DB-9? I work with a radio
product that uses pin 9 of a serial connection in a non-standard fashion (it
is a 0-5 volt analog level representing received signal level). If I
terminate the radio with a straight-up DB-9 to DB-25 connection I end up
blowing up the radio.
Or another radio that uses a DB-25 connection for serial data but uses the
DSR/DTR lines as a secondary data port to program the radio. With a straight
up DB-25 the DSR/DTR transitions from the host causes the programming in the
radio to be corrupted.
These are just two examples and are caused by manufacturers not following
industry standards for what an EIA port should do. This should not be
surprising to R-390A owners, look at the freaky MB connections on the coax
cables connecting the modules together.
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