john@icjapan.info.com (John Higdon) (01/18/91)
In a previous article I had incorrectly indicated that crossbar switches used by NTT were incapable of DTMF operation. The confusion arose from the fact that in the same manner as their electronic switches, DTMF service is a class of service option. Unlike DTMF service in the US, however, Japanese tone service is exclusionary. If you have DTMF enabled, rotary dialing no longer works. In the US, rotary is universal and DTMF is sometimes optional. In Japan, it is "either -- or".