| 摘要 |
In a fixed wireless network such as a wireless local loop (WLL) network, a method for an improved call setup procedure is disclosed. The method includes detecting when a telephone set is taken off-hook by a caller, and wherein in response, a simulated dial tone is generated in the telephone set receiver. When the caller enters a phone number to the called party, a sequence of the first three digits, for example, is compared to a predetermined list of sequences stored in a look-up table. The length of the phone number is identified by matching the sequence with its associated length in the look-up table prior to the conclusion of dialing. The call setup procedure is initiated by sending the entered digits to the switching center for processing immediately after the last digit has been entered. In a first embodiment, if no sequence match is found, a "time-out" procedure is performed to determine when the last digit has been entered in order to initiate call setup. In a second embodiment, a connection is alternatively established to the switch when no sequence is found. The call setup procedure of the present invention, when a match is found, enables efficient use of the radio spectrum by not requiring an immediate connection to the switch during dialing thus potentially enhancing network capacity. Moreover, the method eliminates the need for the caller to press "send" at the conclusion of dialing making the calling experience more closely resemble that of traditional wireline service.
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