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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: | ![]()  | 
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| 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: | 
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| Exit Delay Reset: | 
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| Exit Delay Countdown: | 
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| Cross Zoning: | 
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| Alarm Verification - Fire: | 
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| Swinger Shutdown: | 
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| Unvacated Auto-Stay: | 
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| Alarm Cancel Verification: | 
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| System Configuration (for VISTA-Series Control Panels) | |||||
| Interactive Phone Support: | 
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| Real Time Clock: | 
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| Temporal Bell: | 
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| Bell Supervision: | 
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| Telephone Line Monitor: | 
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| 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): | 
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| "Night" Arming: | 
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| RF Supervision by Transmitter: | 
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| Common Lobby Logic: | 
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| Configurable Zone Type: | 
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| "Battery Saver": | 
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| Keyswitch Arming: | 
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| Convenience Features (for VISTA-Series Control Panels) | |||||
| Single Button Arming: | 
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| Quick Exit: | 
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| Keypad Macros: | 
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| Viewable Event Log at Keypad: | 
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| Pager Capability: | 4 | 4 | 4 | 4 | 4 | 
| Auto Arm/Disarm: | 
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| Graphic Keypad Support: | 4 | 4 | 4 | 4 | 4 | 
| Internet Communication Support: | 
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| Cellular LTE Communication Support: | 
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