# Telephony

### Installing Site2Site VPN for telephony purposes

To set up a VPN connection, we need you to supply:

* The IP address from which you will connect to the PBX
* A list of subnets on your side
* On your side, you need to configure the PBX DNS (supplied by mluvii) to 10.64.0.2, to allow communication through the VPN tunnel
* On your side you need to enable UDP protocol

### Network requirements

In case of restrictive measures (network security at the customer's site) against the Asterisk server (90.181.255.53), the following protocols and ports must be enabled on the network (router):

* UDP communication on ports 10,000-20,000 to/from asteriskmluvii.mluvii.com
* TCP communication on ports 10,000-20,000 to/from asteriskmluvii.mluvii.com
* TCP: 443/UDP: 443
* UDP: 5060