Zetron extender card model 4024

What is for sale: Zetron extender card model 4024

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This is a Zetron extender card which is untested. The Positron Phone
system is used by many cities for 911 call management. I found the card in
I understand that the Positron system is outdated and that most of the larger
cities have replaced it, but there are still a number of smaller ones making
If you know anything about this card or the other components I have for
that system, please drop me a line.