Telephone dialing system with recall memory - stores telephone numbers in MOS memory for single recall to automatic dialling

摘要

The telephone dialling memory with recall for automatic dialling has a keyboard (1) connected to a binary coder (2), which feeds the MOS memory (3) and a binary decoding memory (4). The decoder output is coupled to the main memory address input (8) and to a computer (7). A read-out circuit (10) is coupled to the main memory output and generates the dialling pulses representing the call code read out from the main memory. Depressing the appropriate button on the keyboard either writes the number already on the keyboard into the memory or recalls, for automatic dialling, a number stored in the memory at the address corresponding to the button depressed.