What are some my options for remote access, telephone entry systems & apps?

A commercial Telephone Entry System with Access Control is designed for use as a primary access control device for gated communities, parking garages, office buildings, apartments, dormitories, hotels/motels, commercial buildings and recreational facilities. The Telephone Entry works very much the same way as a wired intercom, with several overall advantages. The system utilizes hands-free, full duplex telephone communications between visitors and residents for granting access. Complete access control event logging, access time restriction, access location restriction, and administration functions are also available to manage the installation.