发明名称 Dialing process for IP telephony
摘要 A system and a method for communicating dialed digits between a communication device and a call processor during call setup include transmitting at least the first digit of a telephone number from the communication device to the call processor within a first data packet. The call processor references a dialing plan to determine if the first data packet provides sufficient digits to complete the requested call. If not, the call processor determines the minimum quantity of digits required under the dialing plan to determine the destination of the call and transmits a protocol command to the communication device to transmit the minimum quantity of digits to the call processor within a subsequent data packet. The call processor continues to reference the dialing plan to determine whether additional digits are required and to request additional packets until sufficient packets have been received to establish the call. In an alternative embodiment, the call processor responds to identification of a variable-length telephone number by enabling a timer in the communication device. After being enabled, the timer is reset each time a user enters a subsequent digit. Upon expiration of a predetermined time interval either after the user has entered a previous digit or after the timer was enabled, the communication device transmits any digits the user has entered after enablement of the timer to the call processor within a subsequent data packet. The call processor attempts to establish the call utilizing digits received before and after enablement of the timer.
申请公布号 US6351526(B1) 申请公布日期 2002.02.26
申请号 US19990265485 申请日期 1999.03.09
申请人 SIEMENS INFORMATION AND COMMUNICATION NETWORKS INC. 发明人 SHAFFER SHMUEL;BEYDA WILLIAM J.
分类号 H04M1/253;H04Q3/545;(IPC1-7):H04M3/42;H04M7/00;H04L12/66;H04L12/28;H04L12/56 主分类号 H04M1/253
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