@thor
No cause it's not gonna be just 1 person there. You can expect several people to be in the space at the same time, only sometimes some of them might leave temporarily and it becomes a clusterfuck if you keep having to change phones around to whoever promises to stay put.

Imagine you leave on a break with the designated phone by accident, and someone calls you to solve a problem, but you can't help cause you're 5 minutes away from the office, so you now how to give the guy calling you a different number of a colleague you hope is still there and you're wasting everyone's time.

It sounds weird in the mobile phone era, but sometimes a landline makes things simpler.