Honeywell MS-9200UDLSE - Manual (Page 186)

Remote Site Upload/Download
186 MS-9200UDLS PN 52750:E1 01/27/09
6.2.1 Security Features
Upload and download with the control panel have been carefully designed to include key security
features to ensure proper functionality. Any time a transfer is initiated, the control panel and the
Service Terminal will communicate and transfer data before contacting a Central Station. When
the data transfers are completed and the control panel disconnects from the Service Terminal, the
control panel will call the Central Station and report one of the following conditions:
• Upload/Download request received
• Upload and/or Download request successful
• Upload/Download failed
The key features are listed and explained in the following sections.
Secret Code Verification
A secret code is stored in the control panel by a Service Terminal to prevent unauthorized access.
The secret code is created at the Service Terminal by the master user and cannot be viewed or
changed by anyone other than a master user. Viewing of the secret code is prohibited at the control
panel. Prior to allowing an upload or download of data, the control panel will verify the secret code
transmitted by the Service Terminal.
Time-out at Control Panel
Upon answering an incoming call on either the primary or secondary Central Station phone line, the
control panel will listen for a modem connection signal. If this signal is not received within 50
seconds, the control panel will disconnect the call. Upon successful connection (secret code
verified), if no communication occurs within 30 minutes, the panel will disconnect the call. Upon
time-out, transfer activity will be reported to the Central Station (if enabled) and the connection
will be terminated.
Error Checking
As each block of data is received by the control panel, 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).
Central Station Data Protection
The primary and secondary Central Station phone numbers, communications format, account code,
test time and programmable event codes are vital Central Station information. These blocks of data
are protected from partial programming due to faulty phone connections, line noise and other
errors. This prevents the panel from being confused due to a wrong phone number, account code,
test time and most critical formatting errors.