Modem data call bypass of a telephone network voice switch

摘要

In a data bypass system for use in diverting data calls to a central office based modem bank and a data network at the subscriber's discretion, the data call diversion is carried out on the basis of a data call prefix preceding a user's dialing string. The data call prefix is translated into a data network address. The data bypass system is either an analog or a digital bypass system for modem data call bypass of a telephone network voice switch. The bypass system has a line card with a switch that selectively connects the subscriber line to the voice switch or to a data switch or router through two respective concentrators. Instead of the data call prefix, the data call diversion may be carried out by the use of a software program prepared by a subscriber.