发明名称 |
Method and apparatus for normalizing DTMF messages from a cellular mobile station |
摘要 |
A system for normalizing a Dual-Tone Multi-Frequency ("DTMF") tone is provided for use in a digital wireless telecommunications system. The normalization system has an electronic memory with normalization parameter variable that stores a redefinable value. A programmable DTMF tone generator circuit is coupled to the electronic memory. The tone generator circuit has an input terminal for receiving a DTMF message packet. A program, executable on the DTMF tone generator, normalizes the DTMF message packet by substituting the redefinable value of the parameter variable in the DTMF message packet such that a normalized DTMF tone is transmitted through an output terminal of the DTMF tone generator circuit.
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申请公布号 |
US6151514(A) |
申请公布日期 |
2000.11.21 |
申请号 |
US19980064530 |
申请日期 |
1998.04.22 |
申请人 |
NORTEL NETWORKS CORPORATION |
发明人 |
CHENG, HEIKWAN;CHEN, MARK |
分类号 |
H04M1/2745;H04M1/725;H04M3/24;H04Q1/45;H04Q7/22;(IPC1-7):H04Q7/20 |
主分类号 |
H04M1/2745 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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