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|  | Honeywell VISTA 20P Phone/VoIP | Honeywell VISTA 20P Cellular AT&T | Honeywell VISTA 20P Cellular Verizon | Honeywell VISTA 20P Dual-Path AT&T | Honeywell VISTA 20P Dual-Path Verizon | 
| Internet Communications: |  |  |  |  |  | 
| Cellular Communications: |  |  AT&T LTE |  Verizon LTE |  AT&T LTE |  Verizon LTE | 
| Maximum Zone Capacity: | 64 | 64 | 64 | 64 | 64 | 
| Maximum Zone Capacity (Minus Keyfobs): | 48 | 48 | 48 | 48 | 48 | 
| On-Board Hardwired Zones (w/Zone Doubling): | 8 (15) | 8 (15) | 8 (15) | 8 (15) | 8 (15) | 
| Maximum ECP Hardwire Expansion Zones: | 40 | 40 | 40 | 40 | 40 | 
| Maximum Wireless Expansion Zones: | 40 | 40 | 40 | 40 | 40 | 
| Wireless Keys (do not use zones): | 16 | 16 | 16 | 16 | 16 | 
| Partitions: | 2 "true" | 2 "true" | 2 "true" | 2 "true" | 2 "true" | 
| User Codes: | 48 | 48 | 48 | 48 | 48 | 
| Event Log: | 100 | 100 | 100 | 100 | 100 | 
| Maximum Number Two-Wire Smokes: | 16 | 16 | 16 | 16 | 16 | 
| Maximum Number of Schedules: | 32 | 32 | 32 | 32 | 32 | 
| False Alarm Prevention Features (for VISTA-Series Control Panels) | |||||
| Exit Error Logic: |  |  |  |  |  | 
| Exit Delay Reset: |  |  |  |  |  | 
| Exit Delay Countdown: |  |  |  |  |  | 
| Cross Zoning: |  |  |  |  |  | 
| Alarm Verification - Fire: |  |  |  |  |  | 
| Swinger Shutdown: |  |  |  |  |  | 
| Unvacated Auto-Stay: |  |  |  |  |  | 
| Alarm Cancel Verification: |  |  |  |  |  | 
| System Configuration (for VISTA-Series Control Panels) | |||||
| Interactive Phone Support: |  |  |  |  |  | 
| Real Time Clock: |  |  |  |  |  | 
| Temporal Bell: |  |  |  |  |  | 
| Bell Supervision: |  |  |  |  |  | 
| Telephone Line Monitor: |  |  |  |  |  | 
| On-Board Triggers: | 2 | 2 | 2 | 2 | 2 | 
| Relays Supported: | 16 | 16 | 16 | 16 | 16 | 
| X-10 Devices Supported: | 16 | 16 | 16 | 16 | 16 | 
| Additional Features (for VISTA-Series Control Panels) | |||||
| Cross Partitioning (go to): |  |  |  |  |  | 
| "Night" Arming: |  |  |  |  |  | 
| RF Supervision by Transmitter: |  |  |  |  |  | 
| Common Lobby Logic: |  |  |  |  |  | 
| Configurable Zone Type: |  |  |  |  |  | 
| "Battery Saver": |  |  |  |  |  | 
| Keyswitch Arming: |  |  |  |  |  | 
| Convenience Features (for VISTA-Series Control Panels) | |||||
| Single Button Arming: |  |  |  |  |  | 
| Quick Exit: |  |  |  |  |  | 
| Keypad Macros: |  |  |  |  |  | 
| Viewable Event Log at Keypad: |  |  |  |  |  | 
| Pager Capability: | 4 | 4 | 4 | 4 | 4 | 
| Auto Arm/Disarm: |  |  |  |  |  | 
| Graphic Keypad Support: | 4 | 4 | 4 | 4 | 4 | 
| Internet Communication Support: |  |  |  |  |  | 
| Cellular LTE Communication Support: |  |  |  |  |  |