# Network Recommendations

#### Access to the following FQDNs are required:

* TCP: 443 ac.landis.cloud
* TCP: 443 cc.landis.cloud
* TCP: 443 landisattendantconsole.service.signalr.net
* TCP: 443 \*.microsoftonline.com
* ACS [Network Recommendations](https://docs.microsoft.com/en-us/azure/communication-services/concepts/voice-video-calling/network-requirements)