Firewall and network requirements

To join meetings and make calls from your Echo devices, you must have the following ports and protocols:

Service	Protocol	Destination Port	Transport
Signaling	HTTPS	443	TCP
Media port/connectivity negotiation	ICE/STUN/TURN	3478	TCP/UDP Note UDP is preferred. Only open TCP 3478 if UDP 3478 isn't allowed.
Conference or PSTN calling audio Note G.711 audio codec	SRTP	49152 - 65535	UDP