Integrated telephone transmission and switching system

A telephone system, operating in a multi-frame format where each frame consists of a plurality of time slots, said system comprising

• a plurality of multitime-slot bidirectional data buses,
• base switch means connected to said bidirectional buses for specifying selected ones of said time slots and for switching data between the specified time slots,
• a plurality of subscriber lines,
• subscriber switch means connected to said subscriber lines and to a first pair of said bidirectional buses for encoding switching data on said subscriber lines, thereby forming first encoded data, and for switching said first encoded data to specified ones of said time slots on either of said pair of bidirectional buses, whereby said base switch means switches the encoded data to specified time slots on said plurality of buses,
• said base switch means connected to receive second encoded data in other specified time slots on said plurality of buses for switching said second encoded data to specified time slots on said pair of buses,
• said subscriber means connected to receive said second encoded data for decoding said second encoded data and for switching the resulting decoded data to specified ones of said subscriber lines,
• said subscriber switch means including means for encoding data on said subscriber lines, thereby forming third encoded data, interchanger means having a plurality of channel unit locations corresponding to said subscriber lines and means for switching said third encoded data between specified ones of said locations in said interchanger means, means for decoding said switched encoded data, and means for switching the decoded data resulting from the latter operation to specified ones of said subscriber lines.

A telephone system operating in a multiframe format where each frame consists of a plurality of time slots, comprising:

• a plurality of multitime-slot bidirectional data buses,
• base switch means connected to said data buses for specifying said time slots and for switching data between the specified time slots,
• a plurality of subscriber lines,
• subscriber switch means connected to said subscriber lines and to a pair of said buses for encoding data on said subscriber lines, thereby forming first encoded data, and for switching said first encoded data to specified ones of said time slots on either of said pair of buses, whereby said base switch means switches said first encoded data to specified slots on said plurality of buses,
• said base switch means connected to receive second encoded data on said plurality of buses for switching said second encoded data to other specified time slots on either of said pair of buses, said subscriber switch means connected to receive said second encoded data for decoding said second encoded data and for switching the resulting decoded data to specified ones of said subscriber lines,
• said subscriber switch means including means for encoding data on said subscriber lines, thereby forming third encoded data, interchanger means having a plurality of channel unit locations corresponding to said subscriber lines and means for switching said third encoded data between specified ones of said locations in said interchanger means, means for decoding said third encoded data, and means for switching the decoded data resulting from the latter operation to specified ones of said subscriber lines.

An integrated telephone transmission and switching system, said system operating in a multiframe format where each frame consists of a plurality of time slots having a time slot rate, comprising:

• a plurality of multitime-slot bidirectional data buses,
• base switch means connected to said plurality of data buses for specifying some of said time slots and for switching encoded data between the specified time slots,
• a plurality of subscriber lines,
• subscriber switch means connected to said subscriber lines and to a pair of said data buses for encoding data on said subscriber lines, thereby forming first encoded data, and for switching said first encoded data to specified ones of said time slots on either of said pair of buses, whereby said base switch means switches said first encoded data to specified time slots on said plurality of buses,
• said base switch means connected to receive second encoded data in other specified time slots on said plurality of buses for switching said second encoded data to other specified time slots on either of said pair of buses,
• said subscriber switch means connected to receive said second encoded data for decoding said second encoded data and for switching the resulting decoded data to said subscriber lines,
• said subscriber switch means including a number of subscriber terminals connected to some of said subscriber lines, each of said subscriber terminals including encoding means for encoding and multiplexing data from said subscriber lines into a pulse code modulated format corresponding to said multiframe format and for decoding and demultiplexing said second encoded data,
• subscriber switch controller means connected to said pair of data buses for controlling the switching of said encoded data between said encoding means in said terminals and said specified time slots,
• said controller means including means for enabling the switching of said first and second encoded data between said encoding means in said terminals and said pair of buses and means for switching data between specified ones of said subscriber lines, said subscriber terminals including means for encoding data on said subscriber lines, thereby forming third encoded data, said controller means including interchanger means having a plurality of channel unit locations corresponding to said subscriber lines and means for switching said third encoded data between specified ones of said locations in said interchanger means, means for decoding said switched encoded data, and means for enabling the switching of the decoded data resulting from the latter operation to specified ones of said subscriber lines.

In a telephone system operating in a multiframe format where each frame consists of a plurality of time slots, said system including a base switch connected to a plurality of multitime-slot bidirectional data buses for specifying some of the time slots on said buses and for switching encoded data in a format corresponding to the multiframe format between the specified time slots on any of said buses, a local subscriber switch comprising:

• a plurality of subscriber lines,
• a number of subscriber terminals, each of said terminals connected to some of said subscriber lines and including means for encoding and multiplexing data from said subscriber lines into a format corresponding to said multiframe format, thereby forming first encoded data, and for decoding, demultiplexing and switching second encoded data in said format on specified ones of said time slots to said subscriber lines,
• subscriber switch controller means connected to a pair of said buses and to each of said terminals for enabling the switching of encoded data between said encoding means in said terminals and specified time slots on either of said pair of buses, said controller means including means for switching data between specified ones of said subscriber lines, said subscriber terminals including means for encoding data on said subscriber lines thereby forming third encoded data, said controller means including interchanger means having a plurality of channel unit locations corresponding to said subscriber lines and means for switching said third encoded data between specified ones of said locations in said interchanger means, means for decoding said switched encoded data and means for enabling the switching of the decoded data resulting from the latter operation between specified ones of said subscriber lines.

In a telephone system operating in a multi-frame format where each frame consists of a plurality of time slots, said system including a base switch connected to a plurality of multitime-slot bidirectional data buses for specifying some of the time slots on said buses and for switching encoded data between specified time slots on any of said buses, a local subscriber switch comprising:

• a plurality of subscriber lines,
• a number of subscriber terminals, each of said terminals connected to some of said subscriber lines, said terminals including means for encoding and multiplexing data on said subscriber lines into a format corresponding to said multiframe format, thereby forming first encoded data,
• subscriber switch controller means connected to each of said terminals and to a pair of said buses for enabling the switching of said first encoded data between said encoding means in said terminals and specified time slots on either of said pair of buses, and for enabling the switching of second encoded data between said subscriber terminals, said controller means including,
• a pair of controllers, each of said controllers connected to one bus of said pair of buses, and including means for enabling the switching of data from specified ones of said subscriber lines to said specified time slots on said one bus, each controller connected to receive third encoded data on said one bus for switching said third encoded data to said subscriber terminals, said terminals including means for decoding and demultiplexing said third encoded data and means for switching the resulting decoded data to said specified ones of said subscriber lines.

In a telephone system operating in a multiframe format having time frames each consisting of a plurality of time slots, said system including a base switch connected to a plurality of multitimeslot bidirectional data buses for switching data between specified ones of the time slots on said buses, a subscriber switch connected to a pair of said buses comprising:

• a plurality of local subscriber lines,
• subscriber terminal means connected to said subscriber lines including means for encoding and multiplexing data on said subscriber lines into a format corresponding to said multiframe format, thereby forming first encoded data,
• subscriber switch controller means connected to said terminal means and to said pair of buses for switching said first encoded data to specified ones of said time slots on either of said pair of buses, thereby switching said data from said encoding means to either of said pair of buses, said controller means including means for switching second encoded data in specified time slots on either of said pair of buses to said terminal means, said terminal means including means for decoding and demultiplexing said second encoded data and for switching the resulting decoded data to said subscriber lines, said controller means including means for switching data between specified ones of said subscriber lines, including means for encoding data on said subscriber lines, thereby forming third encoded data, interchanger means having a plurality of channel unit locations corresponding to said subscriber lines and means for switching said third encoded data between specified ones of said locations in said interchanger means, means for decoding said switched encoded data and means for switching the decoded data resulting from the latter operation to specified ones of said subscriber lines connected to said terminal means.

An integrated telephone transmission and switching system operating in a multiframe format where each frame consists of a plurality of time slots having a time slot rate, said system comprising:

• a plurality of multitime-slot bidirectional data buses,
• base switch means connected to said bidirectional data buses for specifying selected ones of said time slots and for switching encoded data between the specified time slots,
• a plurality of subscriber lines,
• first and second subscriber switch means, each of said subscriber switch means connected to some of said subscriber lines and to a pair of said bidirectional buses for encoding data on said subscriber lines, thereby forming first encoded data and for switching said first encoded data to specified ones of said time slots on either bus of said pair of buses, whereby said base switch means switches said first encoded data to other specified time slots on said plurality of buses,
• said base switch means connected to receive second encoded data in other time slots on said plurality of buses for switching said second encoded data to specified time slots on either of said pair of buses,
• said first and second subscriber switch means connected to receive said second encoded data for decoding said second encoded data and for switching the resulting decoded data to specified ones of said subscriber lines,
• said first subscriber switch means including means for encoding other data on said subscriber lines, thereby forming third encoded data, interchanger means having a plurality of channel unit locations corresponding to said subscriber lines and means for switching said third encoded data between specified ones of said locations in said interchanger means, means for decoding said third encoded data, and means for switching the decoded data resulting from the latter operation to specified ones of said subscriber lines,
• said second subscriber switch means connected to another multitime-slot data bus for switching fourth encoded data between said another bus and said pair of buses or between said another bus and said subscriber lines.

A telephone transmission and switching system operating in a multiframe format where each frame consists of a plurality of time slots having a time slot rate, said system comprising:

• a plurality of multitime-slot bidirectional data buses,
• base switch means connected to said data buses for switching first encoded data between specified time slots on said plurality of buses,
• a plurality of subscriber lines,
• subscriber switch means connected to said plurality of subscriber lines and to a pair of said bidirectional buses for encoding and switching data on one or more of said subscriber lines to one or more specified time slots, respectively, on either bus of said pair of buses, whereby said base switch means switches the encoded data to other specified time slots on said plurality of buses,
• said base switch means connected to receive second encoded data on said plurality of buses for switching said second encoded data to other specified time slots on either of said pair of buses, each subscriber switch means connected to receive said second encoded data for decoding said second encoded data and for switching the resulting decoded data to said one or more subscriber lines, said subscriber switch means including means for encoding other data on said subscriber lines, thereby forming third encoded data, interchanger means having a plurality of channel unit locations corresponding to said subscriber lines and means for switching said third encoded data between specified ones of said locations in said interchanger means, means for decoding said switched encoded data, and means for switching the decoded data resulting from the latter operation to specified ones of said subscriber lines.