Remote FXO for PSTN lines

[daktur]

Hi all,

Just want to make sure, is it possible to have a remote FXO router connected to a hosted windows PBX v15.5?

I have found a very good path provider but it is not possible to install it locally.

I can even build a VPN if needed, both sites have fixed ip and will not be running behind NAT.

Thanks!

 

[GiannosC_3CX]

Hi daktur,

Please visit the following links, you can find more information on how an FXO (the links contain only supported devices ) can be configured remotely.
https://www.3cx.com/voip-gateways/patton-network-configuration/
https://www.3cx.com/voip-gateways/patton-smartnode-sn4112/

 

[daktur]

@GiannosC_3CX

Thanks!

I could not understand if the VPN is a must or not.

 

[NikosT_3CX]

If the PBX is not behind NAT then you will not be able to setup the gateway.
The PBX must have a local ip address so what you may do is to add a 2nd NIC on the PBX with a private ip address and not a default gateway. Then you must setup the VPN between the remote site and the PBX.
Keep in mind that this must be done during the installation of the PBX and the 2nd NIC can not be added on the fly.
So during the installation you will select the one which does not have the default gateway so the provisioning links for the Local LAN extensions, will have the link of the NIC
without the gateway so they will be able to connect.
Now after the installation, on the Management Console >> Settings >> Network>> Select Network Card Interface >> Public ip tab go and change the NIC and choose the one that has the gateway so the remote extensions will be
able to connect. The Tunnel ip address will also update automatically.
Then restart all the services of the PBX.


Check also 3cx Academy slide 11 here :
https://www.3cx.com/3cxacademy/videos/intermediate/advanced-installation/


Also check Supported network installations : https://www.3cx.com/blog/docs/network-configurations-supported-3cx-phone-system/

The reason behind this is that if the PBX has a full public ip address only, then it assumes that its on the cloud and it can accept only remote registrations for extensions and no local.

If you have any further questions, let us know.

 

[sip.bg]

Probably the best way is to use VPN to remote site without NAT (just trivial, i.e. Layer 3 routing between LANs in the main and remote locations) and to install a FXO gateway at the remote location. Using MikroTik routers for example is a very cost effective way to achieve this. You don't need to do anything special into 3CX PBX to achieve this functionality -- configure the FXO gateway just as it is in the local network of the 3CX PBX.

 

[daktur]

@nikosT_3cx

The pbx and the gateway will be in different locations since server is located in europe and the landline provider is in Brazil.

The gateway will also not be behind NAT, they both have fixed public ip addresses.

Does it make any difference?

Thanks again for the help.