Does anybody know anything about Taiwan's network? The reason I ask is there's a fax number I found on a UIFN that sounds like it not only gets service from a non-digital switch, there's some kind of non-digital tandeming operation going on as well.
Give it a call if you'd like; +800-9999-1234
It's worth noting that with some carriers (usually AT&T), you'll go through some kind of non-digital UIFN route to places like Germany. This looks to be different; all three UIFN carriers (Sprint, MCI, AT&T) will send you through this tandem.