Patent ID: 6590908
Filing Date: 2003-07-08
Classification: H04J,H04Q

Abstract:
An external signal synchronized message signaling apparatus which inserts a message into predetermined channels to form a time division frame and transmits the time division frame in synchronism with an external signal, comprising:a message memory having the message stored at predetermined addresses thereof; a read control memory in which information of the addresses of said message memory at which the message is stored and external synchronization information indicative of whether the message should be signaled in synchronism with the external signal are stored in a coordinated relationship at storage positions thereof which corresponds to predetermined channel timings of a time division output frame; and a read controller for reading out, for each channel timing of the time division output frame, the address information and the external synchronization information at the corresponding storage position from said read control memory and, when the external signal is inputted at the channel timing and the external synchronization information indicates synchronized signaling, reading out the message from said message memory based on the address information and signaling the message to the time division output frame.