Filter
Top Products
396
SX-200 ICP MX Technician’s Handbook
Operation
The FIM has three functional sections: a transmitter, a receiver, and a
control section.
The transmitter section accepts data from the node in which it is installed.
The data is converted to byte-interleaved format, and a checksum is
calculated. The checksum byte is combined with the data and the frame
synchronization information. The frame is encoded as serial data and
transmitted on the fiber.
The receiver section converts the incoming data to parallel format, extracts
the frame synchronization information, and decodes the data. Control and
status information is extracted and further decoded. The checksum is
verified and an error counter updated. The status information and data are
combined, frame-aligned, and re-formatted for output.
The control section generates control signals and the transmit clocks. This
section also regenerates the telephony clocks for the peripheral nodes,
and provides status information for the Main Controller.
Two LEDs indicate the detection of local and remote clocks.