External signal synchronized message signaling apparatus for...

Details External signal synchronized message signaling apparatus for... External signal synchronized message signaling apparatus for...

H - Electricity

04

L

H04L 5/22 (2006.01) H04J 3/06 (2006.01) H04J 3/08 (2006.01) H04J 3/12 (2006.01) H04L 7/04 (2006.01) H04Q 3/00 (2006.01)

Patent

CA 2281848

An external signal synchronized message signaling apparatus which outputs a particular message to channels of a time division output frame in accordance with a state of an external signal is disclosed. The message signaling apparatus includes a switch buffer, a selector, a message memory, a read control memory and a read controller. Addresses common to the switch buffer and the message memory are stored in the read control memory, and the read controller reads out one of the addresses from the read control memory, reads out data from the switch buffer or the message memory based on the read out address and outputs the read out data to a time division frame. Synchronization instruction information is set individually for the individual data in the read control memory or the message memory, and only when an external synchronizing signal is present when data to be signaled for an individual channel us to be read out, the address read out by the read controller is used as an address for the message memory.

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