Security Features - Fire-Lite 411UDAC Installation, Programming, Troubleshooting And Operating Instruction Manual

Fire alarm communicator
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General
With program address location 64 set to '1' in Program Mode, anytime a contact with callback is initiated, the com-
municator will first either contact the primary Central Station or contact both the primary and secondary Central Sta-
tions or contact the first available Central Station phone number to report a 'request for upload/download' message
(depending upon the program entry in address location 137). Once the request is 'kissed-off' by the Central Sta-
tion(s), the communicator will then call the appropriate Service Terminal and begin the downloading process.
With program address location 64 set to '1' in Program Mode, anytime a contact with callback disabled is initiated,
the communicator and the Service Terminal will communicate and transfer data without first contacting a Central Sta-
tion. When the data transfers are completed and the communicator disconnects from the Service Terminal, the com-
municator will call the Central Station and report one of the following:
• Upload/download request received
• Upload and/or download successful
• Upload/download failed
To prevent the 'request for upload/download' message(s) from being reported to the Central Station(s), make certain
to set address 64 to '0' or '3' or disable all upload/download reports back to both Central Stations. Refer to Table 3-
2 on page 40 through Table 3-4, "Ademco Contact ID Format - Secondary," on page 44 for additional information.
Unlike most competitive products, during the downloading process, the input monitoring and 411UDAC supervision
remain active. Should an input activation or system trouble occur, the communicator immediately terminates down-
loading, processes the trouble or alarm locally and transmits the information to the Central Station(s).

5.1.1 Security Features

Remote site upload and download with the 411UDAC have been carefully designed to include key security features
to ensure proper functionality. The key features are listed and explained below.
Secret Code Verification
A secret code is stored in the communicator by a Service Terminal to prevent unauthorized access. The secret
code is created at the Service Terminal by a Master user and cannot be viewed or changed by anyone other than a
Master user. Viewing of the secret code is prohibited at the communicator. Prior to allowing an upload or down-
load of data, the communicator will verify the secret code transmitted by the Service Terminal.
Time-out at 411UDAC
Upon answering an incoming call on the primary Central Station phone line, the communicator will listen for a
modem connection signal. If this signal is not received within 30 seconds, the communicator will disconnect the
call. Upon successful connection (i.e. secret code verified and callback complete if applicable), if no communica-
tion occurs within two minutes, the communicator will disconnect the call.
Callback to Service Terminal
Any time that the communicator is remotely requested to allow an upload or download with callback, it will con-
firm the source of the incoming call, hang-up and call the calling party (Service Terminal phone number) back.
Error Checking
As each block of data is received by the communicator, it is checked for accuracy. If an error is detected, the
block is retransmitted until correct, up to a maximum of four times. If the Secret Code is not verified and four
errors occur, the call is disconnected and the report that the upload/download was not successful is called to the
Central Station(s).
62
411UDAC
Document #51073
Rev. D 12/09/2008
P/N 51073:D

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