Well I solved it myself. Although a Print TNB showed no assignments, by using "LUU", and "LUC" in load 20 I was able to figure out that there were still "cards" installed in software. After removing the "cards" ("OUT" type "CARD"), LD...
One way to have a cheap telephone system is to use an old SL-1 system with the processor cards from an Option 21. The first time I did this we hired a company that charged a foutune to reprogram the Option 21 software to work on the older SL-1 system. They said it was a tricky procedure to...
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