BT have confirmed that their recent outage has been ‘resolved and services restored’.
We can also confirm this as we have slowly seen all customer alarms clearing. As many customers are aware that we operate a 24×7 monitoring platform so saw this issue start and checked that there was nothing we could do in most cases but also contacted key customers to warn them that they might be issues.
Therefore, any issues that Customers have experienced this morning when connecting to services using BT connectivity (including quality issues) should now be resolved. In the event that issues are still occurring, please reboot equipment on the BT line such as Firewalls or Routers and retest. 
If you have any questions whatsoever please do not hesitate to contact us, Also if you are a
Asterisk / Freepbx reseller or user and would like affordable monitoring please get in touch as we provide Asterisk Monitoring from £25 per year.