Up0-interface

Encyclopedia : U : UP : UP0 : Up0-interface

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The U_p0-Interface is an ISDN-interface used in private networks. It derives from the U_K0-Interface used in public networks.

In public networks the maximum cable length of an U bus is between 4 and 8 km, and the maximum length of an S₀-bus is 900 meters for Point-to-Point configuration, and about 150-300m for point-to-multipoint configurations.

The U_p0-bus has, - depending on cable quality, a reach of between 2 and 4 km – far more than the S₀-bus. This makes possible the use of ISDN telephony equipment in large private networks.

Unlike the S₀-bus, the U_p0-bus is running half duplex, that is, both sides alternate in sending and receiving.

While the S₀-bus lets one connect several ISDN devices (up to 8), the U_p0-bus can connect only two devices (one at each end of the cable).

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