Test access port (TAP) equipment

Abstract

The invention discloses test access port (TAP) equipment. High-speed data is distributed to a plurality of monitoring ports by using an electric replication method, and signal quality is kept unchanged. An original signal is recovered from attenuation on a transmission path by an input end equalization circuit, an output end pre-emphasis circuit and a clock recovery circuit, and a transmission delay is ensured to be lowest.

Description

technical field [0001] The invention belongs to the field of network technology, and in particular, belongs to a TAP device. Background technique [0002] In applications such as large-scale high-performance search and high-performance data mining, a single workstation / server usually cannot meet the computing requirements, which requires the data sent from the external network to be distributed to hundreds or thousands of workstations for separate calculations. The composition is as follows: figure 1 system shown. TAP101 receives the data from the external network, copies one data into 8 outputs and distributes it to 8 TAP102s on the next layer. The 8 TAP102s on the second floor copy the 8 channels of data into 64 channels and distribute them to the 64 TAP103s on the third floor, and the 64 TAP103s on the third floor finally distribute the data to 256 workstations / server sets. If you need to support a larger number of workstations / servers, you need to use a TAP with more o...

AI Technical Summary

Problems solved by technology

The optical module working at 1550nm wavelength is more expensive than the optical module working at 1310nm and 850nm wavelength, and the volume is too large to achieve SFP size, which will greatly increase system cost and reduce system capacity

[0009] 2. The fiber amplifier will introduce additional dispersion during the amplification process, including Group Velocity Dispersion (GVD), etc., which will increase the pulse width of the optical signal, and the result is to reduce the signal quality, and may cause errors in severe cases. code

[0010] 3. The fiber amplifier will introduce additional delay time

Figure 9 It is the eye diagram of a 10GE signal after being attenuated by a 45cm long FR4 transmission line. Due to the different attenuation value of the signal with the frequency change and inter-symbol interference, the eye line of the eye diagram is very messy and basically unrecognizable

[0022] 3. The layout of the transceiver port is unreasonable, resulting in excessive attenuation and long delay of some replication paths

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