---
sourceDocument: Australia Telecom Service Operations Management
sourceDocumentLink: https://www.servicenow.com/docs/r/australia/telecom-service-ops

 Release :

    - australia

ft:locale :

    - en-US

ft:publication_title :

    - Australia Telecom Service Operations Management

ft:clusterId :

    - tsom

bundleId :

    - tsom

workflow :

    - Customer and Industry


---

# MPN latency KPIs

# MPN latency KPIs {#ariaid-title1}

Release version: Australia  
Updated November 5, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
Reference for the latency KPIs collected by the MPN Pull Connector and the derived UE-to-switch latency metric.

## Source KPIs {#nokia-mpn-latency-kpis__section_source_kpis}

The MPN Pull Connector collects the following latency KPIs from the `e2e-latency-collector-{env}` Elasticsearch index, filtered to round-trip-time samples
(`phase=rtt`).
{#nokia-mpn-latency-kpis__table_source_kpis__entry__2}

| KPI | Description |
|-|-|
| `collector2ue` | Latency between the collector and the user equipment (UE). |
| `collector2sw` | Latency between the collector and the switch. |
[Table 1. Source KPIs]

{#nokia-mpn-latency-kpis__table_source_kpis}

## Derived KPI {#nokia-mpn-latency-kpis__section_derived_kpi}

TSOM calculates one additional KPI from the source KPIs. This value is not reported directly by the vendor; it is computed after both source KPIs are collected.
{#nokia-mpn-latency-kpis__table_derived_kpi__entry__2}

| KPI | Description |
|-|-|
| `ue2sw` | User-equipment-to-switch latency, calculated as `collector2sw` minus `collector2ue`. If a switch-side record is missing for a given DNN in a collection cycle, the calculation is skipped for that cycle. |
[Table 2. Derived KPI]

{#nokia-mpn-latency-kpis__table_derived_kpi}
**Related concepts**   

* [MPN Formula Engine processing](https://www.servicenow.com/docs/Qy1ZtWGS~dWmzTxMK7~mFg "The Formula Engine processes raw KPI formulas and stores the result in the Formatted KPI Formula field when a record is inserted or updated in the MPN Formulas [sn_tsom_em_conns_kpi_definitions] table.")
* [MPN Latency Dashboard](https://www.servicenow.com/docs/ZBXTEwz2XuU7IBwC075osA "Monitor UE-to-switch latency and related KPIs across MPN-connected devices, with combined and per-KPI trend views, an instance summary table, and a last-recorded-value panel.")  
**Related reference**   

* [MPN Formulas table](https://www.servicenow.com/docs/J1CYl~b2NnZcftqtauXVKA "Reference for the MPN Formulas [sn_tsom_em_conns_kpi_definitions] table and the automatic processing that occurs when a record is inserted or updated.")