Posted by Scott Miller on 11 January 2016 05:23 PM

We are currently experiencing intermittent call issues to UK mobile destinations.

This is currently under investigation by senior Node4 engineers and a further update will be provided shortly.

If you are experiencing an issue that you believe is related to the above, please raise a Node4 support ticket via or contact support on 08451232229.


Update – 17:44 11/01/2016

A major upstream carrier has notified us of a large incident which is affecting their core network and telephony traffic across their core network.

We have received this statement from them;

“We are investigating an issue that is leading to a degradation of service to several CPs. A technical bridge has been established with a view to understanding the root cause. This has the highest priority within the business and has the full focus of all relevant technical and design communities.”

We expect to have a further update by 18:00. Our own Technical Response Team is currently exploring all avenues to mitigate this outage.


Update – 18:59 11/01/2016

Further to this we have received the following from our carrier:

“A possible issue has been identified on a service providers network that is being investigated. Root cause is unknown at present, however we are working to implement a resolution as soon as possible. Further updates to follow.”

Node4 apologises for any inconvenience this may be causing your business.


Update – 19:50 11/01/2016

Senior Node4 engineers have been monitoring the situation and are also in regular contact with carrier engineers. The outbound traffic to mobiles has now returned to normal indicating that the root cause has been resolved, however we have yet to receive a concrete explanation or resolution.

We will continue to the monitor the situation and provide further updates as they become available.

If you need any further clarification or information then please let us know.


Update – 09:57 12/01/2016

We have received confirmation from our carriers that the issues experienced yesterday are resolved.

This was a major incident that affected BT and the majority of UK mobile operators.  Whilst we have not yet received the root cause report we are assured that the issue has identified and fixed, and our own call analysis shows that the service is performing normally (as of approx. 19:15 11th Jan 16).

Whilst this issue was outside of our control, we would like to apologise for any inconvenience experienced by our customers.  We will continue to work with our carriers to ensure that this is being taken seriously by them, and that they are doing all they can to prevent any re-occurrence.

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