How did modems deal with pluses in data? Many years ago, modem maker Hayes Microcomputer Products held a patent dealing with that issue. The clever bit was in

How did modems deal with pluses in data? Many years ago, modem maker Hayes Microcomputer Products held a patent dealing with that issue. The clever bit was in looking for <pause> +++ <pause> to effect the escape. Hayes tried to collect royalties, but this caused quite a kerfuffle. Cheap modem makers didn't bother looking for pauses. "Hilarity" ensued. Other solutions were found. https://en.wikipedia.org/wiki/Time_Independent_Escape_Sequence https://en.wikipedia.org/wiki/Time_Independent_Escape_Sequen...