Need help on product

please suggest products against this specification : GSM,User Friendly interface,online/live call monitoring without time lag,automatic voice activation and continues recording mode, high level security capacity, multibackup facility,SIP Trunk,GUI,4G or 5g call

You are asking a question… Well more like an advise in the “Commercial” section of the forum.

In this section there are requests placed with where people are looking for payed consultancy, job offers or any issues where the transfer of money is involved…

Your request is not clear on what you want, I guess that is why I am the “first responder”…

Maybe you could elaborate a bit on your request…?

Asterisk can be configured to do all of the things in the specification you describe, except maybe directly interfacing with a cell phone tower as this would require some additional hardware.