Time-Out At 411Ud; Callback To Service Terminal; Error Checking; Central Station Acknowledge - Fire-Lite 411UD Manual

Downloading to the Communicator

Time-out at 411UD

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 commu-
nicator will disconnect the call. Upon successful connection (i.e. secret code verified and callback
complete if applicable), if no communication 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 call-
back, it will confirm 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/down-
load was not successful is called to the Central Station(s).

Central Station Acknowledge

There is an option whereby the communicator will report to one or both Central Stations that a
request for uploading or downloading has been received prior to processing the call. This is called
the 'callback' option. If the Central Station(s) does not acknowledge receipt of this request, upload-
ing or downloading is prohibited. If acknowledged by the Central Station(s), another message is
transmitted informing the Central Station(s) that:
• downloading was successful
• uploading was successful
• uploading/downloading was not successful

Data Protection/Integrity

Programming data is completely verified for accuracy prior to reprogramming of the 411/411UD
EEPROM. Incomplete or corrupted data packets are ignored or retried.
5.2 Downloading to the Communicator
Before initiating the download procedure, make certain that the communicator is in the standby
state; the red Line Seize LED is off.
Once an incoming call is accepted/answered by the communicator, the 411UD will:
1. Establish basic modem connection
2. Verify secret code
3. Verify callback vs. no callback request from the Service Terminal. If callback is requested,
perform steps 4 through 10; if no callback is requested, perform steps 9 and 10 only.
4. Identify the Service Terminal location
5. Hang-up/disconnect call
6. Call the Central Station(s) and transmit a request for upload/download message (if
programmed to do so). If this message is accepted, the communicator will proceed to the next
step
7. Return call to the Service Terminal
8. Verify secret code
9. Begin downloading
10. Upon completion of download, call the Central Station(s) back and report a successful
download or failed upload/download status (if programmed to do so).
411 & 411UD Manual — P/N LS10105-000GE-E:A 1/29/2014
Remote Site Upload/Download - 411UD Only
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