Communications system comprising an ISDN terminal equipment connection for different ISDN interfaces in an ISDN switching equipment network

摘要

In ISDN switching equipment networks, the connection of an ISDN terminal equipment (TE) occurs either through a two-wire interface (U.sub. o) or through a four-wire interface (S.sub.o). The ISDN terminal equipment (TE) is formed such that either the U.sub.o or the S.sub.o interface is connectable through a single interface connection. A detector means (DE), a plurality of switch means (SM) and an additional power supply (S) are connected to the ISDN terminal equipment (TE) such that the connection of a U.sub.o interface or S.sub.o interface is automatically detected and is gated to a U.sub.o terminating equipment (U. sub.o E) or to an S.sub.o terminating equipment (S.sub.o E). When a U. sub. o interface connection to the ISDN terminal equipment (TE) is detected, then, by using further switch means (SM) and the S.sub.o terminating equipment (S.sub.o E), the U.sub.o interface is converted into a S.sub.o interface and is available at an additional plug connector (ZSV) for the purpose of connecting further ISDN terminal equipment (TE). When a S.sub. o interface connection is detected in the ISDN terminal equipment (TE), then further switch means (SM) through-connect the S.sub. o interface (S. sub.o) to the additional plug connector (ZSV) for the purpose of connecting further ISDN terminal equipment (TE).