Performance Summary

This section shows how well the link is predicted to perform in response to the selected combination of the variables, such as band, region, equipment, antenna and height. It shows throughput performance at each end of the link. Throughput values are displayed in either kbps or Mbps depending on the product selected.

If the predicted Throughput and Availability values fall below the required values, they are displayed in red (Performance Summary). If they meet or exceed the required values, they are displayed in black. In the following example, the predicted values at North Middle School are displayed in red because they fall below requirements, but the predicted values at Park Lane Elementary School are displayed in black because they exceed requirements:

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Performance Summary

For 2+0 Link Types, the Performance Summary is shown separately for the Aggregate, Link A and Link B paths in tabs. Required Throughput and Availability values can be set individually for each path. The specific path tab is displayed in red, if the individual path (Link A or Link B) or aggregate path fall below the required values. Performance Summary 2+0 Link shows that Link B is not meeting the required values, but the main path (Aggregate) and Link A are meeting the requirements. The link in the list view will be shown in red if any of the three paths are red.

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Performance Summary 2+0 Link

Performance to each Site

This summary is a prediction of the Receive Power, Throughput and Availability at each end of the link, based on the equipment and performance data entered. Enter the required values in the data entry fields for comparison with the predicted data.

Predicted Receive Power: The predicted receive power and associated tolerance level at this end of the link. The tolerance is the sum of two components, a fixed value which is dependent on the equipment performance over temperature and a variable value which is proportional to the amount of Excess Path Loss. When using adaptive modulation the receive power shown is the maximum for the link, which corresponds to the lowest selected modulation mode and Maximum Power. If the link is operating in a higher modulation mode, the normal operating receive power of the link may be lower, as many products have transmit power which varies with modulation mode.

Operational Power: For PTP 8xx when ATPC is set to Enabled or for 60 GHz cnWave where APC is always enabled, the Receive Power displayed is the Operational Power. When ATPC/APC is enabled the Maximum Power may be reduced depending on the link conditions, resulting in lower measured receive powers, which can vary over time. The value shown is a typical value at the high end of what may be achieved. The tolerance levels shown are the same as given for the Predicted Receive Power.

Mean throughput of the planned link in one direction:

Mean IP Predicted: The mean Ethernet throughput capability, calculated from the data entered.

Mean IP Required: Enter the required mean Ethernet throughput capability.

% of Required IP: IP Predicted expressed as a percentage of IP Required.

Minimum throughput of the planned link in one direction:

Min IP Required: Enter the required minimum Ethernet throughput capability.

Min IP Availability Required (%): Enter the required minimum availability of the link.

Min IP Availability Predicted (%): The minimum availability of the link, calculated from the data entered, for the lowest equipment data rate.

note

The Min IP Availability Predicted (%) may be higher than the Lowest Mode Availability if the Min IP Availability Required is set to a value greater than the data rate supported by the Minimum Mod Mode.

note

If ePMP ePTP Mode is selected the capacity achieved in each direction of the link is variable, depending on the load presented. Which direction of the link will take the maximum load is unknown therefore the values presented in the Performance to Each Site are those of the symmetrical case. Values for the peak throughput in a either direction can be found in Performance Details.

Operating Conditions

This option is only available when the ePMP, PTP 820 or PTP 850 products are selected. The throughput of these products is more dependent upon frame size than the other PTP products and this option allows the user to select different frame sizes and view the impact on the throughput.

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Operating Conditions for ePMP, PTP 820 or PTP 850

The throughput displayed in the Performance Summary, as well as in the Performance Details, is for the frame size selected. The frame size options are the standard RFC2544 sizes of 64, 128, 256, 512, 1024 and 1518 bytes. There is also an option to select a pre-determined mixed traffic option called Tolly Mix, which is based on the following combination of packet sizes:

  • 55% of packets at 64 bytes

  • 5% of packets at 78 bytes

  • 17% of packets at 576 bytes

  • 23% of packets at 1518 bytes

note

Tolly Mix is not available for the PTP 850E in the 80 GHz band.