Line switch controller for a time division switching system

Claim 2

In a division switching system having a network bus and a plurality of line switches connected to said bus, means for assigning each call served by said system to a unique time slot in a repetitively recurring series of time slots, memory means for associating each line switch currently serving a call with the time slot to which said call is assigned, means effective during each occurrence of a time slot to which a call is assigned for applying signals identifying said time slot to said memory means, and means responsive to the receipt of said time slot identity signals by said memory means for closing all the line switches currently associated with said time slot.

Claim 3

The system of claim 1 in which said means for closing comprises, a plurality of memory output conductors each of which is unique to one of said line switches and each of which extends from said memory means to its associated line switch, and means including said memory means for applying line switch closing signals to each of sid conductors connected to any one of said line switches currently associated with said time slot.

Claim 4

In a time division switching system having a network bus and a plurality of line switches each of which is connected to said bus, means for assigning each call served by said system to a unique time slot in a repetitively recurring series of time slots, means for determining the line switches serving each call currently being serves by said sytem, a port pulser memory, means responsive to said determination for entering information identifying each line switch currently serving a call into said port pulser memory, means effective upon each occurrence of a time slot to which a call is currently assigned for applying the identity of said time slot to said port pulser memory, and means responsive to each receipt of said time slot identity by said port pulser memory for closing each line switch currently serving said call.

Claim 5

In a time division switching system having a network bus and a plurality of line switches each of which is connected to said bus, means for assigning each call served by said system to a unique time slot in a repetitively recurring series of time slots, means for determining the line switches serving each call currently being serves by said sytem, a port pulser memory, means responsive to said determination for entering information identifying each line switch currently serving a call into said port pulser memory, means effective upon each occurrence of a time slot to which a call is currently assigned for applying the identity of said time slot to said port pulser memory, and means responsive to each receipt of said time slot identity by said port pulser memory for closing each line switch currently serving said call.

Claim 6

The system of claim 3 in combination with a word location in said port pulser memory unique to each of said line switches, means for entering into each location whose line switch is cUrrently serving a call the identity of the time slot to which said call is assigned, means responsive to each subsequent receipt of said time slot identity by said port pulser memory for effecting a content addressable search of said port pulser memory to identify each memory location currently storing said received time slot identity, and means responsive to said content addressable search for applying line switch closing signals to each of said line switches currently serving the call assigned to said identified time slot.

Claim 7

In a time division switiching system having a network bus and a plurality of line switches each of which is connected to said bus, a slot counter for generating a repetitively recurring series of time slots, means for assigning each call served by said system to a unique time slot in said series of time slots, a port address memory for determining the line switches serving each call currently being served by said system, a port pulser memory, means effective upon each ocurrence of a time slot to which a call is currently assigned for applying the identity of said time slot to said port pulser memory, means responsive to each receipt of said time slot identity by said port pulser memory for identifying the line switches serving the call assigned to said time slot, means responsive to said line switch identification for closing each identified line switch during the occurrence of said time slot, means for generating a repetitively recurring series of time frames each of which comprises a plurality of said time slots, means for assigning each call served by said system to a unique time frame in said series of time frames, and call processing means for processing information signals for each call only during each occurrence of the time frame to which said call is assigned.

Claim 8

In a time division switiching system having a network bus and a plurality of line switches each of which is connected to said bus, a slot counter for generating a repetitively recurring series of time slots, means for assigning each call served by said system to a unique time slot in said series of time slots, a port address memory for determining the line switches serving each call currently being served by said system, a port pulser memory, means effective upon each ocurrence of a time slot to which a call is currently assigned for applying the identity of said time slot to said port pulser memory, means responsive to each receipt of said time slot identity by said port pulser memory for identifying the line switches serving the call assigned to said time slot, means responsive to said line switch identification for closing each identified line switch during the occurrence of said time slot, means for generating a repetitively recurring series of time frames each of which comprises a plurality of said time slots, means for assigning each call served by said system to a unique time frame in said series of time frames, and call processing means for processing information signals for each call only during each occurrence of the time frame to which said call is assigned.

Claim 9

The system of claim 5 in which said means for closing further comprises, a word location in said port pulser memory unique to each of said line switches, means for entering into each location whose line switch is currently serving a call the identity of the time slot to which said call is assigned, means responsive to each subsequent receipt of said time slot identity by said port pulser memory for effecting a content addressable search of said port pulser memory to identify each memory location currently storing said received time slot identity, a plurality of memory output conductors each of which is unique to one of said line switches and each of which extends from said port pulser memory to its associated line switch, and means responsive to said content addressable search for applying line switch closing signals to each of said conductors extending to a switch currently serving the call assigned to the time slot whose identity is received by said port pulser memory.

Claim 10

In a line switch controller for a time division switching system in which each call served by said system is assigned to a unique time slot in a repetitively recurring series of time slots, a memory having a plurality of word locations each of which is individual to a different one of said line switches, means for selectively writing information comprising the identity of a time slot to which a call is assigned into the word location of each line switch serving said call, and means for subsequently applying said time slot identity information to said memory for identifying all switches currently serving the call assigned to said time slot.

Claim 11

In a line switch controller for a time division switching system in which each call served by said system is assigned to a unique time slot in a repetitively recurring series of time slots, a memory having a plurality of word locations each of which is individual to a different one of said line switches, means for selectively writing information comprising the identity of a time slot to which a call is assigned into the word location of each line switch serving said call, and means for subsequently applying said time slot identity information to said memory for identifying all switches currently serving the call assigned to said time slot.

Claim 12

The system of claim 7 in which said means for writing said time slot identity comprises, means for concurrently applying a write signal to a first input of said memory, means for applying said time slot identity to a second input of said memory, and means for applying a signal to a memory output conductor unique to the word location into which said time slot identity is to be written.

Claim 13

The system of claim 8 in which said means for identifying said line switches comprises, means for applying a search signal to a third input of said memory, said memory being Responsive to the concurrent receipt of said search signal and said slot identity applied to said second input to effect a content addressable search of said word locations to identify all locations currently storing said time slot identity.

Claim 14

The system of claim 9 in combination with a plurality of output conductors each of which extends from a different one of said memory word locations to the line switch associated with each location, and means responsive to said content addressable search for applying line switch closing signals to the conductors extending to said identified switches.

Claim 17

The method of claim 11 in combination with the additional steps of, generating a repetitively recurring series of time frames each of which comprises a plurality of said time slots, assigning each call currently being served by said system to a unique time frame in said series of time frames, and processing information signals for a call only during each occurrence of the time frame to which said call is assigned.

Claim 20

The method of claim 13 in combination with the additional steps of, performing a content addressable search within said port pulser memory upon each receipt of a time slot identity to identify each memory word location currently storing said received time slot identity, and applying line switch closing signals to output conductors extending from said port pulser memory to the line switches associated with each identified word location.

Claim 21

The method of claim 14 in combination with the additional steps of, generating a repetitively recurring series of time frames each of which comprises a plurality of said time slots, assigning each call currently being served by said system to a unique time frame in said series of time frames, and processing information signals for a call only during each occurrence of the time frame to which said call is assigned.