Can local ISDN/Analogue lines be used?

Question:
I am currently using a local ISDN (or analogue) connection to the telco. Can I use a gateway to connect those numbers to a Hosted by 3CX instance?

Answer:
No. You must port your numbers to any of our 3CX supported SIP Trunk providers for hosted by 3CX. 
If you have local analogue endpoints, such as a door phone, you can use an FXS gateway via the 3CX SBC to connect those devices to your hosted instance!