How to set up Asterisk + 2 mobile + 1 landline?

Question

Asterisk

Hello! There was a need to combine mobile and one landline phones on one Asterisk. I have no experience with Asterisk. Tell me how best to do this, advise good articles on this topic. I would like to organize a server (I read on Habré that it is possible to do this on a wifi router), I plan to answer calls either through a computer or through an ip phone. There will be two jobs. If possible, I would like to make a small voice greeting.
I would be very grateful for your help!

Answer 1

To be honest, such a description of the task would have looked much more appropriate on a freelance exchange.
In general, the process of installing Asterisk on a router is perfectly googled, to connect mobile lines you will need a VoIP / GSM gateway or 3G modems for use with chan_dongle . As for the city line - if it's not SIP, then you need a VoIP gateway with an FXO port. Regarding the greeting, it is done very simply, there are a lot of how-to in Google.
If something specific doesn't work, please ask.

Answer 2

Isn't it easier to buy a Siemens GIGASET A510 IP, connect it to a multiphone from a megaphone + a city line?