In article <[log in to unmask]>,
Pearsall, Jim <[log in to unmask]> wrote:
>     We have a batch data collection device (COLOG PC) connected to a DTC
>     port that gives us trouble every time the DTC is reset (power loss,
>     manual reset, etc.).
>
>     Whenever the DTC is reset the port "hangs" and becomes unusable.  The
>     only solution we've found is to physically disconnect the cable from
>     the DTC, reset the port, and reconnect the cable.  This is very
>     inconvenient since the DTC is in a remote location several miles from
>     the data center.
>
>     Any ideas what's causing the problem or how to correct it?
 
 
HP support claims it's crosstalk that knocks out the port. I've got three
of them in remote computing centers (each about 400 miles from me) and
they have to be manully disconnected and the dtc dowloaded to get the
port to become active again. HP support claims that making connectors
that omit unused pairs will clear up the problem. I've yet to see it work :(