- Compatible with Viking's vandal resistant K-1700-3, K-1900-8, or any Touch Tone phone- Non-volatile E2 memory (no batteries required)- Remotely or locally programmable- Stores 250 tenant Touch Tone phone numbers and keyless entry codes- Programmable tenant's relay activation code- Programmable master keyless entry code and five maintenance codes- Programmable call timer- Multi-number dialer mode (for Kiosks, etc.)- Ring-thru mode for calling the entry phone- Normally open and normally closed (DPDT) relay contacts for controlling door strikes, magnetic locks, gates, etc.- Auxiliary relay input to trigger a timed relay activation for postal locks, etc.- Touch Tone and pulse dialing toll restriction- Programmable allow/restrict for 911 and 311 outside calls- Log bus data output for logging entry events