Paradox Evo 848 Programming Older Evo model programming Basic Programming Location 521 (Dialer options) LED 3, 4, 5, 6 must be ON All others OFF Location 550 (Format Contact ID) Enter 5555 Location 551 Enter [4-digit account code] Location 561 Enter [Phone number] Important Notes After Programming: Always REBOOT the panel after completing programming Account Code Rules: NEVER use account codes starting with "0" (e.g., 0001) Use 1001 instead Can use hex A: 1AA1 (press "stay" button for hex A) Troubleshooting Panel not communicating after programming Reboot is mandatory Check all LEDs in location 521 Account code issues Avoid leading zeros Try hex characters if numeric codes fail