When teams went remote, a lot of businesses discovered their phone system simply couldn't keep up. Desk phones tied to a physical office don't help much when half your staff is working from home, a job site, or another city entirely.
Cloud based phone systems solve this by making your business number and call routing independent of location. Calls can ring a desk phone, a laptop app, and a mobile phone at the same time, and staff can log in from anywhere with the same extension and voicemail they'd have in the office.
For businesses balancing in office and remote staff, this isn't a luxury feature anymore. It's the baseline expectation from customers and employees alike.