← Back to Articles
Historical — Network View
Last Updated: July 07, 2026

The Historical tab in Analyze Network View provides time-series graphs that display modem information and KPIs on the currently selected context. The available graphs vary by context.

Contexts above the CMTS

For contexts above the CMTS, the following historical graphs are available. After selecting the context and the Historical tab, select one of the following from the Category drop-down:
  • Summary

    Under the Summary category, historical Connectivity Scores are graphed. Connectivity Scores report on degraded modem hours by thresholded values: critical, major, minor, none, and unknown. The values are calculated by aggregating the uncorrectable codeword error rates of the SC-QAM and OFDM/A channels. For more details about this graph, see Connectivity Score.

  • NSI (Network-side Interface) graphs

    NSI is the upstream and downstream interface on the CMTS on the WAN/backbone side. For access to the internet and other data communication, the CMTS is connected to the external network through the NSI. Use the NSI statistics, In Utilization and Out Utilization, to analyze potential traffic issues. Each line, or series, on the graph is an interface. The interfaces are listed on the Interfaces tab in the right panel. For details about the KPIs, see NSI — Network View.

CMTS

For the CMTS context, the following historical graphs are available. After selecting a CMTS and the Historical tab, select one of the following from the Category drop-down:

  • Summary

    Summary graphs include Modem counts, MTA device counts, and Connectivity Score.

    For modem counts, the data displayed shows the number of modems with online, offline, or intermediate status over a specified time period. For MTA device counts, if there is a valid voice license, the data displayed shows the number of provisioned devices over a specified time period.

    Connectivity Scores report on degraded modem hours by thresholded values: critical, major, minor, none, and unknown. The values are calculated by aggregating the uncorrectable codeword error rates of the SC-QAM and OFDM/A channels. For more details about this graph, see Connectivity Score.

  • NSI (Network-side Interface) graphs

    NSI is the upstream and downstream interface on the CMTS on the WAN/backbone side. For access to the internet and other data communication, the CMTS is connected to the external network through the NSI. Use the NSI statistics, In Utilization and Out Utilization, to analyze potential traffic issues. Each line, or series, on the graph is an interface. The interfaces are listed on the Interfaces tab in the right panel. For details about the KPIs, see NSI — Network View.

MAC Domain and MD-CM-SG

For MAC Domain and MD-CM-SG contexts, you can select groups of KPIs by category, or individually. After selecting a MAC Domain or MC-CM-SG and the Historical tab, select one of the following from the Category drop-down:

  • Summary

    The Summary category allows you to select individual KPIs from five sets of parameters:

    • SC-QAM — Upstream and downstream FEC, Noise, Power, and Utilization KPIs
    • OFDM/A — Upstream and downstream FEC, Noise, Power, and Utilization KPIs
    • CM — Modem status and resets
    • Counts — Modem counts, MTA counts
    • Score — Connectivity Score
  • Upstream FEC
  • Downstream FEC
  • Upstream Noise
  • Downstream Noise
  • Upstream Power
  • Downstream Power
  • Upstream Utilization
  • Downstream Utilization

Excluding the Summary category, for each category, a pre-selected set of graphs are displayed.

Depending on the KPI and group selected, each time series represents one of the following:
  • A channel
  • A channel+modem pairing
  • A channel+modem+IUC/Profile triplet