Gte Automatic Electric Incorporated

Gte Automatic Electric Labs Inc.

Gte Automatic Electric Laboratories Incorporated

Stig E Magnusson

Sergio E Puccini

Nathaniel Simmons

Donald W McLaughlin

David J Stelte

Kamal I Parikh

John L Clements

Kanal I Parikh

David J Stelt

The present invention is an approach for verifying the operation of read only memory digital pads associated with the switching network digital switching system. Any failures are detected and an indication is transmitted for fault detection and recovery.

Failure detection apparatus for use with digital pads

An arrangement for interfacing the originating time stage (OTS) and terminating time stage (TTS) of a time and control unit (TCU) to the space stage of T-S-T digital switching system. The space stage includes an intra-path through the space stage as well as an interpath. The interface transmits PCM samples simultaneously from the OTS to both the intra and interpaths of the space stage. PCM samples from the space stage are received by an intra buffer and an inter buffer from the intra path and inter path respectively. A TCU control memory gates and connects either the intra buffer or inter buffer to the TTS.

Arrangement for interfacing the space stage to the time stages of a

A space stage for a T-S-T digital switching system is shown arranged into modular functional elements. The elements are combined allowing the space stage to grow modularly to interconnect from one to thirty-two originating time stages and terminating time stages.

Modular space stage arrangement for a T-S-T digital switching system

A space stage for a T-S-T digital switching system is shown arranged into four identical space stage units (SSU). Each SSU is arranged into modular functional elements. The elements are combined in each SSU to allow the space stage to grow modularly, interconnecting from thirty-two to sixty-four originating time and terminating time stages.

Modularly expandable space stage for a T-S-T digital switching system

A space stage for a T-S-T digital switching system is shown arranged to interconnect the originating time stages (OTS) and terminating time stages (TTS) of a first time group and the OTS's and TTS's of a second time group. The space stage includes four identical space stage units (SSU). The first SSU interconnects the OTS's and TTS's of the first time group and the second SSU the OTS's and TTS's of the second time group. The third SSU interconnects the OTS's of the first time group to the TTS's of the second time group and the fourth SSU interconnects the OTS's of the second time group to the TTS's of the first time group.

Space stage arrangement for a T-S-T digital switching system

An arrangement for the distribution of digital service tones in a distributed processor digital switching network is shown. These service tones are distributed between the time stages of the digital switching network with a minimum of interprocessor communication. This is accomplished by transmitting the particular service tone, from the terminating time stage which detects the need for tone application, through the switching network paths already established for voice communication. These service tones include such tones as reorder tone, dial tone, busy tone, DTMF tones, MF tones and ringback tone.

Arrangement for digital tone distribution

This fault recovery system determines the integrity of a duplex digital PCM switching network. The two copies of the switching network operate in synchronization and comparison of the outputs of each copy of the switching network takes place in order to detect network faults. The fault recovery mechanism is chiefly provided by inserting PCM samples from maintenance registers into the PCM data stream, through the digital switching network and trapping said PCM sample for analysis by the program. Subsequently, the logical unit corresponding to each fault is determined and a count is recorded corresponding to each unit.

Fault recovery apparatus for a PCM switching network

A simplex time-space-time switching network is shown in which there is a crossover of voice information from one rail to another rail in a large digital switching system. The time control unit is divided into two rails both incoming and outgoing. Each rail multiplexes two 193 channel streams into one 386 channel stream of information. These two rails crossover in the originating time switching stage but remain segregated throughout the space switching stage and the terminating time switching stage.

Dual rail time control unit for a T-S-T-digital switching system

A duplex time-space-time switching network is shown in which there is a multiple crossover of voice information from one rail to another rail in a large digital switching system. The time and control unit is divided into two rails both incoming and outgoing. Each rail multiplexes two 193 channel streams into one 386 channel stream of information. These two rails crossover in the originating and terminating time switching stages but remain segregated throughout the space switching stage.

Dual rail time and control unit for a duplex T-S-T-digital switching

A time-space-time switching network is shown in which there is a crossover of voice information from one rail to another rail in a large digital switching system. The time and control unit is divided into two rails both incoming and outgoing. Each rail multiplexes two 193 channel streams into one 386 channel stream of information. These two rails crossover in the terminating time switching stage but remain segregated throughout the space switching stage and the originating time switching stage.

Dual rail time and control unit for a T-S-T-digital switching system

A duplex time-space-time switching network is shown in which there is a crossover of voice information from one rail to another rail in a large digital switching system. The time and control unit is divided into two rails both incoming and outgoing. Each rail multiplexes two 193 channel streams into one 386 channel stream of information. These two rails crossover in the originating time switching stage but remain segregated throughout the space switching stage and the terminating time switching stage.

A duplex time-space-time switching network is shown in which there is a crossover of voice information from one rail to another rail in a large digital switching system. The time and control unit is divided into two rails both incoming and outgoing. Each rail multiplexes two 193 channel streams into one 386 channel stream of information. These two rails crossover in the terminating time switching stage but remain segregated throughout the space switching stage and the terminating time switching stage.

A time-space-time switching network is shown in which there is a multiple crossover of voice information from one rail to another rail in a large digital switching system. The time and control unit is divided into two rails both incoming and outgoing. Each rail multiplexes two 193 channel streams into one 386 channel stream of information. These two rails crossover in either or both the originating and terminating time switching stages but remain segregated throughout the space switching stage.

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Phoenix, AZ, United States of America

Stig E Magnusson