Multi-task state machine signalling translator

Details Multi-task state machine signalling translator Multi-task state machine signalling translator

H - Electricity

04

J

363/10

H04J 3/00 (2006.01) H04J 3/12 (2006.01) H04Q 1/50 (2006.01)

Patent

CA 1301967

907-008 ABSTRACT OF THE DISCLOSURE Real-time conversion between two different A/B signal coding schemes based on the DS1 time division multiplex format is achieved by time sharing a programmable state machine. The time sharing is accomplished synchronously with the DS1 superframe such that each of the 24 DS1 channels have signalling translated once every superframe. Programmability of the state machine is facilitated by the use of an EPROM. A RAM is used for real-time storage of signal states, machine states and processor provisioning for each channel, thereby facilitating time sharing of the state machines. Flexibility is provided through the unique use of an EPROM, which can be modified to directly change the signalling-translation response depending on the type of telephony service being provided and the coding scheme used for the signalling. Processor provisioning of the RAM selects a service type translation for each of the 24 DS1 channels.

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