Does the connection with the virtual PBX require an open port in our firewall?

95% of the time: no. Because of the characteristics of outgoing communications, there is no need to open firewall ports or make any changes in your network. The only exception is a firewall setup with extraordinarily strict outbound rules.

The list of open ports in the firewall necessary For communication with the virtual PBX:

Direction	Protocol	Port	Appointment
Outgoing	TCP	80	Web control panel virtual PBX
Both	UDP	5060	SIP alarm system for remote IP phones
Both	UDP	10000-20000	RTP for remote IP phones Astra
Both	UDP	10000-20000	RTP for remote IP phones Polycom
Both	UDP	9710-20000	RTP for remote Soft phones

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