This is a classic eruv "top-wire" pole:
This is a variation on the theme:
This, let us call a "side top-wire":
This a variation on this theme:
Rabbi Herschel Schachter shlita has opined that "side top-wire" is the same as "top-wire" - i.e., that it does not constitute tzuras ha'pesach min ha'tzad. Although afar ani tachas raglav, I don't understand his position.
Has anyone heard of any other opinions pro or con in this issue?