The Model 1835 is an ideal telephone entry system suited for apartment and gated community applications as well as office buildings and industrial sites that have a separate access control system, or require telephone entry only.
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.
Stores up to 3000 telephone numbers and names. Transaction buffer stores last 8000 events..