Telephone switching control arrangement

A time division switching system comprising

• two time-shared space division switches,
• means for designating either one of said time-shared space division switches as active and the corresponding other one of said time-shared space division switches as standby,
• a control arrangement comprising control distribution means for transmitting control messages to and receiving control messages from the one of said time-shared space division switches designated as active and for transmitting control messages to and receiving control messages from the one of said time-shared space division switches designated as standby,
• a plurality of interface modules each comprising means for transmitting control messages and data words representing subscriber-generated information to and receiving control messages and data words representing subscriber-generated information from said one of said time-shared space division switches designated as active and for transmitting control messages to and receiving control messages from said one of said time-shared space division switches designated as standby, and
• means for controlling said time-shared space division switches and said plurality of interface modules such that said one of said time-shared space division switches designated as active conveys control messages among said interface modules and said control distribution means and conveys data words representing subscriber-generated information among said interface modules and such that said one of said time-shared space division switches designated as standby conveys control messages among said interface modules and said control distribution means.

A time-division switching system comprising

• a control arrangement comprising control distribution means for transmitting and receiving control messages,
• a plurality of interface modules each comprising means for transmitting and receiving data words representing subscriber-generated information and for transmitting and receiving control messages,
• first and second switching means each for selectively conveying data words representing subscriber-generated information and control messages among said plurality of interface modules and said control distribution means,
• means for generating a first status designation and a second status designation,
• wherein each of said plurality of interface modules comprises means responsive to said first status designation for transmitting control messages to and receiving control messages from said first switching means, for transmitting control messages to and receiving control messages from said second switching means, for transmitting data words representing subscriber-generated information to said first switching means and said second switching means and for receiving data words representing subscriber-generated information from said first switching means, and
• wherein each of said plurality of interface modules comprises means responsive to said second status designation for transmitting control messages to and receiving control messages from said first switching means, for transmitting control messages to and receiving control messages from said second switching means, for transmitting data words representing subscriber-generated information to said first switching means and said second switching means and for receiving data words representing subscriber-generated information from said second switching means.

A time division switching system comprising

• a control arrangement comprising control distribution means for transmitting and receiving control messages,
• a plurality of units each comprising means for transmitting and receiving data words representing subscriber-generated information and for transmitting and receiving control messages,
• means for generating an active status designation and a standby status designation, and
• first and second switching means each connected to said plurality of units and said control distribution means, said first and said second switching means each comprising means responsive to said active status designation for conveying first predetermined ones of said control messages transmitted by said control distribution means and first predetermined ones of said control messages transmitted by said units among said units and said control distribution means and for conveying data words representing subscriber-generated information among said units, and comprising means responsive to said standby status designation for conveying second predetermined ones of said control messages transmitted by said control distribution means and second predetermined ones of said control messages transmitted by said units among said units and said control distribution means.

A time division switching system comprising

• a first and a second time-shared space division switch,
• means for designating either one of said first and said second time-shared space division switches as active and the corresponding other one of said first and said second time-shared space division switches as standby,
• a control arrangement comprising control distribution means for transmitting control messages to and receiving control messages from said first time-shared space division switch and for transmitting control messages to and receiving control messages from said second time-shared space division switch, and
• a plurality of interface modules each comprising a first switch interface associated with said first time-shared space division switch, a second switch interface associated with said second time-shared space division switch, transmitter means for transmitting data words representing subscriber-generated information to said first and said second switch interfaces, receiver means for receiving data words representing subscriber-generated information from the one of said first and said second switch interfaces associated with the one of said first and said second time-shared space division switches designated as active, and processor means for transmitting and receiving control messages, wherein said first switch interface comprises means for receiving from said transmitter means and transmitting to said first time-shared space division switch data words representing subscriber-generated information and for receiving from said processor means and transmitting to said first time-shared space division switch first predetermined ones of said control messages transmitted by said processor means and means for receiving from said first time-shared space division switch and transmitting to said receiver means data words representing subscriber-generated information and for receiving from said first time-shared space division switch and transmitting to said processor means control messages, and wherein said second switch interface comprises means for receiving from said transmitter means and transmitting to said second time-shared space division switch data words representing subscriber-generated information and for receiving from said processor means and transmitting to said second time-shared space division switch second predetermined ones of said control messages transmitted by said processor means and means for receiving from said second time-shared space division switch and transmitting to said receiver means data words representing subscriber-generated information and for receiving from said second time-shared space division switch and transmitting to said processor means control messages.

A time division switching system comprising

• a first and a second time-shared space division switch,
• means for designating either one of said first and said second time-shared space division switches as active and the corresponding other one of said first and said second time-shared space division switches as standby,
• a control arrangement comprising control distribution means for transmitting control messages to and receiving control messages from said first time-shared space division switch and for transmitting control messages to and receiving control messages from said second time-shared space division switch, and
• a plurality of interface modules each comprising a first switch interface associated with said first time-shared space division switch, a second switch interface associated with said second time-shared space division switch, first and second transmitter means each for transmitting data words representing subscriber-generated information to said first and said second switch interfaces, first and second receiver means each for receiving data words representing subscriber-generated information from the one of said first and said second switch interfaces associated with the one of said first and said second time-shared space division switches designated as active, and processor means for transmitting and receiving control messages, wherein said first switch interface comprises means for receiving from a selected one of said first and said second transmitter means and transmitting to said first time-shared space division switch data words representing subscriber-generated information and for receiving from said processor means and transmitting to said first time-shared space division switch first predetermined ones of said control messages transmitted by said processor means and means for receiving from said first time-shared space division switch and transmitting to said first and said second receiver means data words representing subscriber-generated information and for receiving from said first time-shared space division switch and transmitting to said processor means control messages, and wherein said second switch interface comprises means for receiving from said selected one of said first and said second transmitter means and transmitting to said second time-shared space division switch data words representing subscriber-generated information and for receiving from said processor means and transmitting to said second time-shared space division switch second predetermined ones of said control messages transmitted by said processor means and means for receiving from said second time-shared space division switch and transmitting to said first and said second receiver means data words representing subscriber-generated information and for receiving from said second time-shared space division switch and transmitting to said processor means control messages.

A time division switching system comprising

• a first and a second time-shared space division switch,
• means for designating either one of said first and said second time-shared space division switches as active and the corresponding other one of said first and said second time-shared space division switches as standby,
• a control arrangement comprising control distribution means for transmitting control messages to and receiving control messages from said first time-shared space division switch and for transmitting control messages to and receiving control messages from said second time-shared space division switch, and
• a plurality of interface modules each comprising a first switch interface associated with said first time-shared space division switch, a second switch interface associated with said second time-shared space division switch, first and second transmitter means each for transmitting data words representing subscriber-generated information to said first and said second switch interfaces, first and second receiver means each for receiving data words representing subscriber-generated information from the one of said first and said second switch interfaces associated with the one of said first and said second time-shared space division switches designated as active, and first and second processor means each for transmitting and receiving control messages, wherein said first switch interface comprises means for receiving from a selected one of said first and said second transmitter means and transmitting to said first time-shared space division switch data words representing subscriber-generated information and for receiving from a selected one of said first and said second processor means and transmitting to said first time-shared space division switch first predetermined ones of said control messages transmitted by said selected one of said first and said second processor means and means for receiving from said first time-shared space division switch and transmitting to said first and said second receiver means data words representing subscriber-generated information and for receiving from said first time-shared space division switch and transmitting to said selected one of said first and said second processor means control messages, and wherein said second switch interface comprises means for receiving from said selected one of said first and said second transmitter means and transmitting to said second time-shared space division switch data words representing subscriber-generated information and for receiving from said selected one of said first and said second processor means and transmitting to said second time-shared space division switch second predetermined ones of said control messages transmitted by said selected one of said first and said second processor means and means for receiving from said second time-shared space division switch and transmitting to said first and said second receiver means data words representing subscriber-generated information and for receiving from said second time-shared space division switch and transmitting to said selected one of said first and said second processor means control messages.

A time division switching system comprising

• first and second switching means each having a plurality of input ports and a plurality of output ports for completing communication paths between said input ports and said output ports in time slots of substantially fixed duration,
• a plurality of interface modules each connected to predetermined ones of said input ports of said first switching means and connected to predetermined ones of said input ports of said second switching means for transmitting data words representing subscriber-generated information and for transmitting control messages comprising an address portion defining one of said interface modules and each of said interface modules connected to predetermined ones of said output ports of said first switching means and connected to predetermined ones of said output ports of said second switching means for receiving data words representing subscriber-generated information and for receiving control messages,
• a control arrangement comprising control distribution means connected to at least one of said input ports of said first switching means and connected to at least one of said input ports of said second switching means for transmitting control messages comprising an address portion defining one of said interface modules and connected to at least one of said output ports of said first switching means and connected to at least one of said output ports of said second switching means for receiving control messages,
• means for controlling said plurality of interface modules and said first and said second switching means such that said first switching means conveys data words representing subscriber-generated information between at least two of said interface modules and conveys control messages between at least one of said interface modules and said control distribution means and such that said second switching means also conveys control messages between said at least one of said interface modules and said control distribution means.