SIP Account from different public IP

[mikelpapamike]

Hello everyone,

Lately my Greek SIP provider (Cosmote) changed their policy and in order to use the SIP account, each SIP can only authenticate from the public IP that is assigned to the router that came with the line.

So, I have a 3cx installation at my office, where a SIP Trunk is registered to cosmote servers and working fine.

Now, I have a telephone line at my house and the credentials for this line to be used as VoIP with the SIP Server of Cosmote.

How can I register a second SIP Trunk on the 3cx Server that will go out from my home internet line to be able to call through both lines? So the phones in the office can make external calls through both lines?

Can it be done with a second 3cx installation at home?

 

[leejor]

It sounds as if you will have to have a device (of some sort), located at your home, to be able to access that trunk. Installing a small version of 3CX, on a Raspberry PI, then connecting to the office installation, with a bridge trunk should work for you.

 

[mikelpapamike]

It sounds as if you will have to have a device (of some sort), located at your home, to be able to access that trunk. Installing a small version of 3CX, on a Raspberry PI, then connecting to the office installation, with a bridge trunk should work for you.

Hello,

Thanks for your reply.

If I install a raspberry with a 3cx instance running on it, then I need another one to run as a bridge?

 

[leejor]

Ideally, you'd create a Bridge trunk on the new 3CX installation at home, and one at the existing one, at the office. One master and one slave. Then route the calls, over the trunk as required.

 

[ChrisC_3CX]

@mikelpapamike

For more information on bridges you can check our 3CX Academy Course:

https://www.3cx.com/3cxacademy/videos/advanced/3cx-bridge-configuration/

and our online documentation:

https://www.3cx.com/docs/manual/connecting-pbx-bridges/