install docker

first we need to install docker and docker compose:

https://wiki.vidalinux.org/index.php/Howto_docker

deploy freepbx container

clone the following repo from github:

git clone https://github.com/vidalinux/docker.git

enter docker-freepbx directory:

cd docker/docker-freepbx

create certs directory and add your domain ssl certificate and key:

mkdir certs
cp server.crt server.key certs/

deploy freepbx container using docker-compose:

docker-compose up -d

go to callcentric and create and account:

https://callcentric.com

add outbound plan to your account:

https://www.callcentric.com/rate/plans

add inbound plan to your account:

https://www.callcentric.com/did

forward your inbound did to your extension:

https://my.callcentric.com/pref_callforward.php

if you doesn't have an internal dns edit /etc/hosts to add the domain:

192.168.75.2 freepbx.ovox.io

enter freepbx interface using your domain:

https://freepbx.ovox.io

add pjsip trunk on your freepbx:

General

trunk name: callcentric
outbound callerid: 77777777
maximum channels: 5

Dial Number Manipulation Rules

( 1 ) | [ 787. ]
( 1 ) | [ 939. ]

pjsip Settings / General

username: 77777777
secret: yourpassword
sip server: sip.callcentric.net
context: from-pstn-toheader

configure outbound routes on freepbx:

Outbound Routes / Route Settings

route name: callcentric-outgoing
override extension: no
trunk sequence for matched routes: callcentric