Door entry system for multi-tenant building

[Eduardo Zepeda]

Hi everyone,

I'm looking for recommendations for a door entry intercom system for a multi-tenant office building that utilizes a data network vs a traditional phone line. The phone lines in my area have become unreasonably expensive (AT&T) and we'd like to switch out Door King door entry system that uses the phone line to IP / data since we already have an ISP connection. If you have any good ideas please let me know.

Thanks!