Comparison Summary
The following is a summary of the test results using the Siama GENEM-X 10G Ethernet/IP Test Application. The performance comparison is between the NVT Phybridge CLEER 24-port switch over 2,000ft of RG6 cable and a competitor’s long reach Ethernet over Coax switch over 2,000ft of RG6 cable. 100 Mbps symmetrical full duplex tested full duplex tested.
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Throughput • Frame Loss • Latency • Jitter • Back-to-Back
Throughput Test
What is Throughput?
The number of packets a network can send through itself at any one time
Measured in bits over time (kbps, mbps)
Example: The number of cars that can fit on a road over a given time
Throughput Results Summary
As seen in the data output below, the CLEER 24 switch experienced 100% throughput levels, at maximum distance and at all frame sizes.
The competitor’s switch experienced varying degrees of maximum bandwidth decreasing as frame sizes increased.
FRAME Loss Test
What is Frame loss?
The number of packets that get lost over a given cable in a network. Can be affected by internal factor such as network performance, and overall load, or external factors like interference or noise on the lines.
Often measured by percentage of frames lost
Example: The number (or percentage) of cars that don’t make it to their destination
Frame Loss Results Summary
As seen in the data output below, the CLEER 24 switch experienced zero frame loss at maximum distance, even as frame sizes increased.
As the frame size increased, the competitor’s switch needed to lower its maximum transmission speed to ensure zero frame loss.
Latency Test
What is Latency?
The time it a takes a packet to get through a network
Measured in time (often milliseconds)
Example: The speed a car can travel on a road at a given time
Latency Results Summary
To ensure real time applications like video and voice communications perform optimally, a switch should have minimal latency. The CLEER 24 switch experienced a gradual increase in latency as the frame size increased.
At the maximum frame size tested, the CLEER 24 switch experienced an average latency of 0.131 milliseconds (131 microseconds). At the maximum frame size tested, the competitor’s switch experienced an average latency of 4.896 milliseconds (4896 microseconds).
Across all frame sizes tested, the competitor’s switch experienced, on average, 67-times more latency than the NVT Phybridge CLEER 24 switch.
Jitter Test
What is Jitter?
The changes in packet speed over time, causing data bunching. Large amounts of jitter often cause frame loss.
Example: The difference between driving at a consistent speed on the freeway versus driving in stop-and-go traffic
Jitter Results Summary
In order to prevent irregular traffic patterns on the network, a switch needs to be consistent in its function. At the maximum frame size tested, the CLEER 24 switch experienced an average of 0 jitter. At the maximum frame size tested, the competitor’s switch experienced an average of 146 microseconds of jitter.
Back-to-Back Test
What is Back-to-Back?
Also known as a burst test. Back-to-back tests the network’s ability to overcome variances in traffic load at any given time.
Back-To-Back Results Summary
When coping with real world traffic which can have bursts, a switch must be able to handle these events effectively to ensure optimal performance. The CLEER 24 switch was able to handle all the bursts delivered during the test, regardless of frame size. The competitor’s switch experienced drops and was unable to sustain the maximum burst for frame sizes above 1024 bytes.
