Forum Discussion
Call drop out no errors\warnings
We have been having various intermittent call drop outs when placing outbound calls. A total of around 17 people are using the SfB Cloud PBX solutions to make PSTN calls outbound and randomly a c...
Are the calls dropping from a home network, or only while connected from within the office network? If the calls are only dropping while connected from within the office, then I would look at the firewall's settings and contact the firewall vendor's support team for assistance. Also, does it make a difference if the clients are connected via wifi or wired?
Microsoft recently updated the minimum TCP/UDP egress port requirements (June 12, 2017), so double check that these ports are allowed out to the internet:
TCP 443
UDP 3478, 3479, 3480 and 3481
reference article is here