Multiplex communications – Wide area network – Packet switching
Patent
1990-01-24
1992-02-25
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
H04J 312
Patent
active
050919040
ABSTRACT:
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.
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Back Je I.
Hong Hyun H.
Kim Deok H.
Kyong Mun G.
Lee Hyeong H.
Korea Electronics and Telecommunications
Marcelo Melvin
Olms Douglas W.
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