Provide 4 Door Entry Points & Keyless Entry (or Optional Card Readers) for up to 250 Apartments or Offices RS-232 Port for programming via a PC Remote or local Touch Tone programmable Supports 4 entry points Supports 4 Wiegand type card readers Compatible with Vikings vandal resistant K-1700-3 K-1900-8 or any Touch Tone phone Non-volatile memory (no batteries required) Stores 250 tenant Touch Tone phone numbers and 250 entry codes Programmable tenants relay activation code Programmable Master entry code & Maintenance Personnel entry codes Programmable call timer Normally open and normally closed relay contacts for controlling door strikes magnetic locks gates etc. Touch Tone toll restriction Allows 911 and 311 outside calls (Programmable) LOG BUS data output for logging entry events