How would they possibly know it's a "vacant line" in Red Creek? There's no way, is there? Is that just a template answer? There's no way they had a real time verification of a marker return in those days? The thing is hard wired, how can you run a real time check against it? Mock me if you must lol?
The intercept operators look up the number in either a book or using a data terminal. It's just a look-up; no technical check is done. Every NON-assigned number is listed as either vacant, temporarily disconnected, changed to 555-2368, etc. They are just reporting how the number is listed in the book or database. "Vacant number" means no one recently had it or ever had it.
@evan High tone is still used on ringback circuits in Pacific Bell COs to this day.
How would they possibly know it's a "vacant line" in Red Creek? There's no way, is there? Is that just a template answer? There's no way they had a real time verification of a marker return in those days? The thing is hard wired, how can you run a real time check against it? Mock me if you must lol?
The intercept operators look up the number in either a book or using a data terminal. It's just a look-up; no technical check is done.
Every NON-assigned number is listed as either vacant, temporarily disconnected, changed to 555-2368, etc. They are just reporting how the number is listed in the book or database. "Vacant number" means no one recently had it or ever had it.
When did that ttttttttttttt start Evans in the 70's