Most telco racks are 23", not 19". Either way, that's a lot to try to fit within a standard 16" stud wall without notching studs. That's something I'd never advocate. You might want to ask the seller to confirm the dimensions anyway.
Visit Atcom to get started with your new business VoIP phone system ASAP
Turn up is quick, painless, and can often be done same day.
Let us show you how to do VoIP right, resulting in crystal clear call quality and easy-to-use features that make everyone happy!
Proudly serving Canada from coast to coast.