| 摘要 |
PURPOSE:To make response of subscribers to be called on a common extension, by transmitting tone ringer sound according to received numeral information, through the connection of trunks having numeral reception function, status monitor function and callout signal transmitting function to a trunk link network of an exchanger. CONSTITUTION:Common subscribers SUBB and general subscribers SUBA are connected to a line link network LLN of an exchanger system and a common individual caller PLT-L is connected between the SUBB and the LLN. An outgoing register trunk ORT, intra-office trunk IOT and call signal trunk RGT are connected to a trunk link network TLN connected to the LLN. Numeral receiving function, status monitor function and callout signal transmission function are given to the TLN and LLN, and tone ringer sound is transmitted according to the numeral information received at the exchanger, allowing to communicate between the SUBB and the SUBA. |
