Feature Explanations:

Residential & Small Business Applications - Designed for use as a single family or small business unit. Can accept up to 100 different codes on some models.
Commercial & Industrial Applications - Designed with capability to support over 100 users. For use with apartment buildings, gated communities, condominiums, office buildings, factories and industrial sites.
PC Programmable - Can be programmed from a PC. Software included or available by download. Most models accept keypad programming also.
Maximum Memory - Maximum amount of expandable memory. More memory supports functions not available on smaller units. Not all units are expandable.
Directory Codes - Amount of digits in codes designated for each user or tenant.
Entry Codes - Maximum amount of codes the unit will accept.
Control Relays - Amount of gates or doors that the unit can control. Each relay operates a separate door or gate. Most models can be expanded to monitor multiple gates or doors but may require more intercom units or keypads. Extra tracker boards may be required to record transactions on these entrances.
Tracker Expansion - Tracker boards can be used to monitor different locations accessed by system.
Elevator Control - Unit capable of controlling elevator use. Can give access to desired floors.
Security Levels - Programmable security levels. Can program different levels of security for each user.
Hold Open Time Zones - Unit can be programmed to allow management to unlock all doors or gates controlled by a tracker board for a specified amount of time..
Transactions Memory - Amount of transactions the unit's buffer will hold in memory. Records all events of entry made on system.
Maximum Device Codes - Maximum cards or transmitters recognized by unit. Card readers and transmitters are only available for select models.
Directory Display - Type of display and maximum amount of characters displayed.
Mounting Options - Types of units available for different mounting situations. Mounting options include surface, flush or wall mounts. Surface mount systems can be installed on pedestals or gooseneck stands.
Optional Internal CCTV Video - Unit is available with CCTV option. The ultimate caller I.D.
Call Forwarding - Allows the unit to dial a pre-programmrom that remote location.
Do Not Disturb -  Programmed times when access will not be available via unit. Usually set up to deny access during night or holiday hours.
Wireless Option -  Unit can be used as a wireless or hard-wired system. See information on respective pages for more information.