| 摘要 |
A voice mail system is provided in a CDMA wireless telephone system (10) in which a base station controller BSC (16) stores, in an encoded format, voice data transmitted by a wireless telephone (18) to a receiving telephone, either wireless (20) or fixed telephone (26), when the receiving telephone (20, 26) does not "pick up". Also, the base station controller (16) encodes and then stores voice data that is transmitted by a fixed telephone (26) to a wireless telephone (18, 20) when the wireless telephone does not "pick up". In either case, to retrieve voice mail the intended recipient can access the voice mail from a fixed telephone (26), in which case the voice mail is decoded at the BSC (16) and then sent to the fixed telephone via a landline. Alternatively, the intended recipient can access the voice mail from a wireless telephone (18, 20) in the system, in which case the voice mail is not decoded at the BSC (16), but is transmitted directly to the wireless telephone, where the message is decoded. In any case, the voice mail undergoes only a single encoding/decoding process, thereby improving the sound quality of the retrieved voice mail messages compared to systems in which tandem vocoding occurs.
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