| 摘要 |
A special feature telephone dialing and switching application system for interconnection to and interaction with the switching system of a central telephone office for converting subscriber-created telephone numbers, including a recognition sequence of one or more digits having alternative alphabetical letter significance, to standard assigned telephone numbers including a 3 digit switch sequence number and a 4 digit recognition sequence number. The recognition sequence of digits of the subscriber-created telephone numbers are followed by the # symbol digit of key dialing telephones and are preceded by a special switch sequence number assigned to the special feature application system within the number phone area code serviced by the central telephone office.
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