# On-premise PBX or cloud: the choice follows a line inventory

No dogma. On-premise if you want the switchboard on site. Cloud if you need mobility and several sites. We decide with you.

On-premise PBX versus cloud: local hardware versus no server, customisation versus scale, best for a head office versus mobile and multi-site teams.

### Can we keep our numbers?

Yes. Number portability is handled end to end so service does not drop.

### On-premise PBX or cloud: how do we choose?

It depends on how much control, mobility and multi-site coverage you need. We advise after a line inventory.

### How long does a migration take?

From a few days to a few weeks, depending on line count and complexity.