| 摘要 |
PURPOSE:To assure an advertisement medium in telephone system, by enabling to transmit the information such as advertisement or the like through a talkie tone transmission means during the transmission of ring back tone to a calling subscriber. CONSTITUTION:When an incoming call from a caller SUB A to a called party SUB B is present, while the called party SUB B responds, the talkie information for ring back tone and advertisement is alternately or superimposingly from a callout tone transmission circuit TNOSC and a talkie trunk TKT to the caller SUB A. In this case, the caller can listen to various information for a monotonous time of waiting until the caller party responds. This service is compulsively given to the caller, but if some subscribers dislike, it is distinguished by classifying the service classes of the callers. |
