The Buenoptic SY series time output extenders is based on GPS signal.The SY series time output can extend the time output to maximum 200 output ports.It can support the following time output formats:
RS-232(DB9 Connector): In telecommunications,TIA 232 (formerly EIA-232 ,formerly EIA RS-232, the ‘RS’ meaning Recommended Standard) is a standard for serial binary data interconnection between a DTE (Data terminal equipment) and a DCE (Data communication equipment). It is commonly used in computer serial ports. This standard was originally used for specifying the connection between an electromechanical teletypewriter and a modem. When electronic terminals began to be used, they were often designed to be interchangeable with teletypes, and so supported RS-232. It is used for all sorts of remote communications, especially through modems, including computer to computer.
RS-485(Terminal): EIA-422 (formerly RS-422) is a serial data communication protocol that specifies 4 wire, full-duplex, differential line, multi-drop communications. It provides for balanced data transmission with unidirectional/non-reversible, terminated or non-terminated transmission lines. In contrast to RS485 (which is multi-point instead of multi-drop) EIA-422 does not allow multiple drivers but only multiple receivers.
IRIG-B(BNC or Terminal): The IRIG time codes, originally developed by the Inter-Range Instrumentation Group (IRIG), now used in government, military and commercial fields. There are many formats and several modulation schemes, but they are typically amplitude modulated on an audio sine wave carrier. The most common version is probably IRIG-B.
NTP/SNTP: Network Time Protocol provides a reliable way of transmitting and receiving time over TCP/IP networks and is useful for synchronizing the internal clock of computers to a common time source to millisecond accuracy. Running as a continuous background client program on a computer, NTP send a periodic time request to servers, obtaining timing information from a Time Server and using them to adjust the client’s work.
TCP/IP: Transmission Control Protocol over Internet ProtocolProvides dependable communication and multiplexing. It is connection-oriented, meaning it requires a connection be established data transfer. It sits on top of the Internet Protocol (IP), which provides packet routing. This is connectionless, meaning each data packet has its source and destination data embedded, so it can bounce around a network and still get to its destination.
Fiber Optic: Time output extension can be through fiber optic cables(single mode-20km or multi mode-2km).The fiber optic connector on the extender can be ST,SC or FC.