| 摘要 |
<p>Apparatus within a telephone detects a long distance prefix, stores the dialed number (11), sends a code for a long distance carrier (17), and then sends the dialed number to the local exchange carrier (18). The apparatus also checks the stored number for toll-free area codes (14, 15) and the dialed number is sent without the code when a toll-free area codes is detected. Automatic insertion can be defeated by including a particular code in the dialed number or by a defeat switch on the telephone.</p> |
