The phones. Seven hundred IP phones across three continents. They register via TFTP, then pull their configuration from the CUCM database. But their old TFTP server had been Big Yellow's IP address.

The Tokyo front desk called. "Phones are up. Better than before, actually. Call transfers are instantaneous."

Mariana leaned back. The virtualized CUCM wasn't just a backup—it was better . No more spinning disks. No more single points of failure. The UCS chassis had redundant PSUs, redundant fabric interconnects, and vMotion. If a host failed, the CUCM VMs would restart on another host in under two minutes.

The first phone in Tokyo lit up. Then twenty. Then two hundred. Registration requests flooded the virtual CUCM. She watched vCenter performance charts: CPU utilization spiked to 60%, then settled at 22%. Memory steady at 7.9GB. Network latency between nodes: 0.3ms.

Starting Cisco CallManager...

Database replication confirmed.

The future of voice wasn't in beige boxes anymore. It was in a few gigabytes of RAM, a reservation policy, and an engineer who knew when to break the rules.