Symtom
When an extension is dialing a local number, the call is failing with a fast busy signal or Call Failed message in 8x8 Work for Desktop, or even with no error message.
Applies To
8x8 Work for Desktop
Call Failure
Resolution
Initial Troubleshooting
Try dialing the number from an offnet (non-8x8) phone network, in order to verify if the dialed number is a valid number.
Check Extension Provisioning
Navigate to Home > Users > Edit.
Click Edit for the extension you would like to verify.
Under External calling permission, check Calling Countryto be correct.
Check that the External calling plan is set either to International or with Domestic.