The Model 1837 is an ideal telephone entry and access control system suited for medium to large apartment and gated community applications as well as office buildings and industrial sites...
VoIP (or Voice over Internet Protocol) is a general term used to describe various transmission technologies, communication protocols, and methodologies that are used to provide voice communication...
Provide Door Entry/Keyless Entry for up to 525 Apartments or Offices with Voice and LCD Assist The AES-2000 Accessible Entry system provides voice messages and help instructions to assist...