Electronics and Telecommunications Research Institute

Je I Back

Young Ki Lee

Hyeong Ho Lee

Ju Young Park

Hyun Ha Hong

Mun G Kyong

Hang G Park

Deok H Kim

Universal signaling service unit for providing such signal that required to connection and progress of calling in time-division electronic switching system. The invention, in constitution that TSU, TSP, ASTU, ASIP, DTIU, DTIP, FIU, FIP, USTU, LSIP, IPCB, ASP are made to cooperate together, is organized such that: PCM signal data are transmitted and received by the control via telephony device-bus TD-bus, fault status is informed via alarm bus, various service functions requiring real time process are commonized to make one universal signaling tranceiver assembly USTA, signaling service function in USTA is divided into signal tone transmitting and receiving mode service group, and standby mode service group, and USTU is divided into USTU .0. and USTU 1; wherein USTA block is organized with TD-bus interface block, control block, sending block, receiving block, SHW interface block, and messages of FIGS. 6a to 6g are exchanged between LSIP and USTA through TD-bus so that universal signal service unit is operated, and sequence of operational process within USTA is carried out in sequence of FIG. 8.

General signaling service unit of electronic switching system

Growing community of inventors

Chungnam, South Korea

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