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Disclosed is a method for loopback chaining for testing systems with multiple media access devices. Benefits include improved ease of testing multiple devices and the data path that connects them.
English (United States)
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Method for loopback chaining for testing systems with
multiple media access devices
Disclosed is a method for loopback chaining for testing systems
with multiple media access devices. Benefits include improved ease of testing
multiple devices and the data path that connects them.
Timeslot ‐ Single element within a TDM stream
Daisy Chain – Connections along the data path such that data
moves in a predictable way
Local connect ‐ Connection between CT bus timeslots local to the
CT bus ‐ TDM bus
testing is a common method for testing devices that transmit and receive data
from external sources. A device can use either an internal loopback scheme to
emulate data transfer within the device or an external loopback device to
crossover the transmit and receive data paths.
multiple devices are used within a system, a method of connecting the loopback
paths of the devices together to form a single loopback path results in a
single test loop to test all the devices in the path. Compared to testing each
device separately, this approach reduces the amount of time needed to test the
disclosed method creates a single loopback path between a CT bus switch and an
Ethernet MAC device. A common handler for the two devices manages the receive
and transmit operations. This enables data to be propagated in a predictable
manner through the single loopback path.
time for the system is reduced by utilizing a commo...