| 摘要 |
PURPOSE:To attain collection of billing of international automatic non-delay calls from public telephone sets, by receiving message billing index information transmitted from an upper-order station. CONSTITUTION:When a public telephone set PSZ-1 makes a call, a subscriber exchanger LS discriminates that a dial number is for an international automatic non-delay call, and transmits a series of selection signals to an international relay exchanger INT via a relay line exchager TS. The exchanger INT discriminates the message billing index and transmits the information to the LS via the relay line exchanger TS. Thus, the exchanger LS discriminates the message billing index, periodically transmits a coin deposition signal at each time in response to the message billing index from a public telephone set communication trunk OGT-C to the PSZ-1 and collects the charge for the international automatic non-delay call. |
