Phone Line Feature

Good Afternoon
Would it be possible to introduce phone line support for the MAX routers?
A lot of the contracts that clients are using also have calls included in their contract and it would be nice to be able to utilise these.

Something like what the old Globsufer iii had with a RJ11 port or even could be put through the LAN to a modern VOIP phone. Maybe with VOIP, it would be possible with the current hardware?

Thank You