| http://www.w3.org/ns/prov#value | - However, other tones can also exist, such as call waiting tone, reorder and others. [0006] Several publications are known that describe the exchange of the ringback tone with a configurable ringback tone used for advertisement. [0007] For example WO 00/49793 (???Advertising method by using ring-back tone???, assigned to Kim Kang Suk, published in 2000) discloses an advertising method by using a ri
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