Make a test call to the numbers affected. Check the Dashboard in the manager under Alerts & Notices for any carrier issues. If any Carrier issues are under the Alerts & Notices please let customer know and try to find out the ETA before calling customer if possible. If they are not able to be reached and the customer has internet and no carrier issues under the Alerts & Notices then please escalate this ticket to Tier 2.
Escalate ticket to tier 2
For in-depth over view of extension