How the DCS 300 Routes Transactions
C-15
C
Data Integrity Modes
The DCS 300 operates in one of two data integrity modes for external Intermec
controllers: Faster and Safer. You define the data integrity mode for each external
controller that the DCS 300 uses to communicate with devices (such as terminals,
readers, and printers). For more information, see the
DCS 300 Technical Reference
Manual
.
Note:
These data integrity modes are provided in addition to the normal data integrity
measures that are built into the DCS 300.
Faster Mode
Faster mode is the default integrity mode. The advantage of Faster mode is speed: the
external controller can forward data to the DCS 300 faster than in Safer mode. The
disadvantage is a small risk that transactions will be lost if the DCS 300 loses power.
Safer Mode
Safer mode provides extra data integrity for both interactive and noninteractive devices.
The advantage of Safer mode is extra security: the external controller retains its copy of
the transaction until the transaction reaches either the application or the Hot Standby
file. The disadvantage is that the external controller cannot forward another transaction
from any device until the current transaction has been acknowledged.
Note:
The out-of-box protocol for the external Intermec controllers contains a
60-second transmission timeout. This means that when the controller delivers data to
the DevComm, it waits 60 seconds for an acknowledgment. If the acknowledgment is
not received within this time, the data is sent again to the DevComm, creating duplicate
data. One solution to this is to set the controller timeout to zero, which disables the
timeout.
Summary of Contents for DCS 300
Page 1: ...P N 067296 005 User s Manual DCS300 ...
Page 4: ...DCS 300 User s Manual blank ...
Page 16: ...DCS 300 User s Manual ...
Page 22: ...DCS 300 User s Manual ...
Page 23: ...Getting Started 1 ...
Page 24: ...DCS 300 System Manual blank ...
Page 42: ...blank ...
Page 43: ...Learning About the DCS 300 2 ...
Page 44: ...DCS 300 User s Manual blank ...
Page 68: ...blank ...
Page 69: ...Connecting to the Upline Network 3 ...
Page 70: ...DCS 300 System Manual 3 2 blank ...
Page 94: ...blank ...
Page 95: ...Connecting to the Intermec RF Network 4 ...
Page 96: ...DCS 300 System Manual blank ...
Page 134: ...blank ...
Page 135: ...Connecting to the 9180 and the Intermec CrossBar Network 5 ...
Page 136: ...DCS 300 System Manual blank blank ...
Page 158: ...DCS 300 System Manual blank ...
Page 159: ...Running Data Collection Browser 6 ...
Page 160: ...DCS 300 System Manual blank ...
Page 171: ...Running Terminal Emulation 7 ...
Page 172: ...DCS 300 System Manual blank ...
Page 209: ...Running Peer to Peer Applications 8 ...
Page 210: ...DCS 300 System Manual blank ...
Page 232: ...blank ...
Page 233: ...Running Terminal Sessions 9 ...
Page 234: ...DCS 300 System Manual blank ...
Page 258: ...DCS 300 System Manual 9 26 blank ...
Page 259: ...Running Screen Mapping 10 ...
Page 260: ...DCS 300 System Manual 10 2 blank ...
Page 269: ...Running Screen Mapping 10 11 10 Screen 3 Screen 4 Main Host Screen Screen 5 ...
Page 333: ...Troubleshooting 11 ...
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Page 372: ...blank ...
Page 373: ...Specifications and Other Helpful Information A ...
Page 374: ...DCS 300 System Manual B 2 blank ...
Page 391: ...Upgrading the DCS 300 and Devices B ...
Page 392: ...DCS 300 System Manual blank ...
Page 411: ...How the DCS 300 Routes Transactions C ...
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Page 430: ...blank ...
Page 431: ...Index I ...
Page 432: ...DCS 300 System Manual I 2 blank ...