Not monitoring emergency 999 calls can be expensive:
September 2025 Ofcom fines Vonage £700,000 for emergency call failures
July 2024 BT fined £17.5m for 999 call-handling failures
More fines in relation to recent outages in summer 2025 may be on the way.
“Our rules require providers to take all necessary measures to ensure uninterrupted access to emergency organisations as part of any call services offered.
Vonage notified Ofcom of an issue affecting its business customers’ ability to make emergency service calls between 23 October 2023 and 3 November 2023.
Vonage also failed to have adequate monitoring procedures in place, which meant it did not have sufficient oversight of its network to enable it to identify an outage affecting emergency calls.”
“Network disruption affected 14,000 emergency calls in June 2023 and lasted 10.5 hours
We found that BT did not have sufficient warning systems in place for when this kind of incident occurs, nor did it have adequate procedures for promptly assessing the severity, impact and likely cause of any such incident or for identifying mitigating actions
Today’s fine sends a broader warning to all firms -– if you’re not properly prepared to deal with disruption to your networks, we’ll hold you to strict account on behalf of consumers.”
Q-Performance is a performance monitoring platform that provides real-time mobile voice and data performance tracking by generating massive volumes of automated tests featuring:
- voice service CS and IMS calls including SIP trace PCAPs
- metrics including RRC activation timers, IP acquisition timers, iperf metrics and TCP metrics
- data service iperf throughput tests at Baseline and Challenge speeds by radio access technology and including TCP trace PCAPs
Generating emergency test calls by using the Android emergency dialer app can be automated using the Q-Probes in coordination with your emergency services liason.
Other integrations can be commissioned, eg. for SIP phones and MCPTT customisations.
Q-Performance Bureau 
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