System for interconnecting a pair of communication systems

System for local or remote switching on and off of computers...

System for on-demand remote access to a self-generating audio re

System for party line suppressed ringing access of subscriber li

System for performing at least one of a checking and adjusting o

System for providing analog and digital telephone functions...

System for providing analog and digital telephone functions...

System for providing increased data speed using high...

System for providing modem access via an IR interface in a PBX

System for providing secure telecommunication access to a comput

System for remote data collection, process for operating this sy

System for remote transfer and collection of data, in particular

System for remotely crediting and billing usage of electronic en

System for remotely monitoring a single- or multi-function insta

System for reporting status data in a facsimile network

System for requesting service of a vending machine

System for resetting a postage meter

System for storing voice recognizable identifiers using a...

System for suppressed ringing access of subscriber lines to...

System for transmitting low frequency tones through a digital lo