Part of Networks and connectivity standards
Appendices
Appendix A: Supporting technical measures
The below table outlines specific metrics which underpin the standards and enable consistent measurement. These metrics allow for translation of the listed standard into observable and assessable criteria.
| Standard | Technical measure | Metric |
|---|---|---|
|
1.1 |
95th percentile WAN bandwidth utilisation measured at the site WAN gateway during the reporting interval. | ≤ 75% |
| 1.2 |
Maximum time for systems to switch to failover WAN connectivity. |
≤ 10s |
| 1.2 | Testing frequency of failover of primary WAN connectivity. | Quarterly |
| 4.3 | 95th percentile round-trip latency measured from wired and wireless endpoints to site WAN gateway. | ≤ 50ms |
| 4.3 | 95th percentile round-trip latency measured from wired and wireless endpoints to LEO and satellite provider gateway (ground station). | ≤ 150ms |
| 4.3 | 95th percentile packet delay variation (jitter) measured from wired and wireless endpoints to the site WAN gateway. | ≤ 20ms |
| 5.1 | DHCP scope utilisation measured as the percentage of assignable IP addresses currently allocated within each DHCP scope. | ≤ 80% |
| 5.2 | Wi-Fi primary signal strength in all areas of the site where Wi-Fi should be accessible by staff, clinical visitors and patients. | ≥ -67dBm |
| 5.2 | Wi-Fi signal-to-noise ratio in all areas of the site where Wi-Fi should be accessible by staff, clinical visitors and patients. | ≥ 20dB |
| 5.4 | Indoor cellular service availability per UK mobile network operator (MNO) within designated critical areas. | ≥ 80% coverage area |
| 5.4 | Indoor cellular service signal strength (RSRP) per UK mobile network operator (MNO) within designated critical areas. | ≥ -95 dBm |
| 5.4 | Indoor cellular service signal quality per UK mobile network operator (MNO) within designated critical areas. | ≥ -12 dB |
Last edited: 30 July 2026 8:36 am