| 摘要 |
A circuit for translating predetermined telephone numbers to new digit sequences, referred to as the translated number, is disclosed. Each of the original telephone numbers consists of a first sequence of digits, referred to as the switch sequence, followed by a second sequence of digits, referred to as the recognition sequence. Additional digits may be present after the recognition sequence. The corresponding translated telephone number consists of the switch sequence of the original telephone number followed by a second sequence of digits, referred to as the end sequence. Telephone numbers which do not being with one of the specified switch sequences are allowed to pass through the present invention unchanged without the introduction of a delay.
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