VeEX MTX150 Series, Руководство пользователя

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3. When all files have been copied to the USB, tap the folder icon (top-right corner) and select Remove
USB Drive to make sure all cached data is transferred to the USB drive, especially when trans-
ferring small files.
Bluetooth ( BT ) File Transfer requires a compatible USB dongle.
Layer 4+ Applications
refers to the Internet layers 4 and above (transport and application layers), which are more closely
related to the customers/subscribers’ applications and the way they use Ethernet, the Internet, and how they
perceive performance (quality).
Stateful TCP testing refers to the validation of TCP connections used for the TCP/IP Protocol Stack. A V-Perf
test will validate that the TCP parameters in the network were set up correctly. The optional V-PROBE is used
as remote server to establish TCP connections and validate that the network is configured correctly for seam-
less passing of TCP traffic. It will also verify the maximum throughput for TCP traffic. Typically in the field, after
running layer 2 & layer 3 tests successfully, a customer may still complain that their connection is slow to
deliver their applications. Running a stateful TCP test will help verify maximum throughput rates in the down-
load and upload direction. If throughput performance is poor, the test can help identify what the issue could be.
TCP Protocol and Overview
Fundamental TCP parameters are the ideal TCP Window Size and Throughput. The complete list of relevant
measurements include:
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TCP Window Size
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TCP Throughput
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Number of Connections Established
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Download Time
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File Transfer Size
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Retransmits