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7 - 14 Symbol DS3407 Product Reference Guide
Software Handshaking
This parameter offers control of the data transmission process in addition to, or instead of, that offered by hardware
handshaking. There are five options.
If software handshaking and hardware handshaking are both enabled, hardware handshaking takes precedence.
•
None
: Select this option to transmit data immediately. The digital scanner expects no response from the host.
•
ACK/NAK
: If you select this option, after transmitting data, the digital scanner expects either an ACK or NAK
response from the host. When it receives a NAK, the digital scanner transmits the same data again and waits
for either an ACK or NAK. After three unsuccessful attempts to send data after receiving NAKs, the digital
scanner issues an error indication and discards the data.
The digital scanner waits up to the programmable Host Serial Response Time-out to receive an ACK or NAK.
If the digital scanner does not get a response in this time, it issues an error indication and discards the data.
There are no retries when a time-out occurs.
•
ENQ
: If you select this option, the digital scanner waits for an ENQ character from the host before
transmitting data. If the digital scanner does not receive an ENQ within the Host Serial Response Time-out, it
issues an error indication and discards the data. The host must transmit an ENQ character at least every
Host Serial Response Time-out to prevent transmission errors.
•
ACK/NAK with ENQ
: This combines the two previous options. For re-transmissions of data, due to a NAK
from the host, an additional ENQ is not required.
•
XON/XOFF
: An XOFF character turns the digital scanner transmission off until the digital scanner receives
an XON character. There are two situations for XON/XOFF:
•
The digital scanner receives an XOFF before it has data to send. When the digital scanner has data to
send, it waits up to Host Serial Response Time-out for an XON character before transmission. If it does
not receive an XON within this time, the digital scanner issues an error indication and discards the data.
•
The digital scanner receives an XOFF during a transmission. Data transmission then stops after sending
the current byte. When the digital scanner receives an XON character, it sends the rest of the data
message. The digital scanner waits indefinitely for the XON.
*
None
ACK/NAK
ENQ
Summary of Contents for Symbol DS3407
Page 1: ...Symbol DS3407 Product Reference Guide ...
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Page 3: ...Symbol DS3407 Product Reference Guide 72E 70274 07 Revision A April 2009 ...
Page 6: ...iv Symbol DS3407 Product Reference Guide ...
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Page 46: ...3 8 Symbol DS3407 Product Reference Guide ...
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Page 230: ...10 82 Symbol DS3407 Product Reference Guide ...
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Page 264: ...12 26 Symbol DS3407 Product Reference Guide Numeric Keypad continued 7 8 9 Cancel ...
Page 310: ...12 72 Symbol DS3407 Product Reference Guide Send ALT Characters continued Send Alt Send Alt ...
Page 331: ...Advanced Data Formatting 12 93 Alphanumeric Keyboard Space Dash ...
Page 332: ...12 94 Symbol DS3407 Product Reference Guide Alphanumeric Keyboard continued Comma ...
Page 333: ...Advanced Data Formatting 12 95 ...
Page 334: ...12 96 Symbol DS3407 Product Reference Guide Alphanumeric Keyboard continued ...
Page 335: ...Advanced Data Formatting 12 97 Alphanumeric Keyboard continued _ Underscore Single Open Quote ...
Page 337: ...Advanced Data Formatting 12 99 Alphanumeric Keyboard continued 6 7 8 9 A B C ...
Page 338: ...12 100 Symbol DS3407 Product Reference Guide Alphanumeric Keyboard continued D E F G H I J ...
Page 339: ...Advanced Data Formatting 12 101 Alphanumeric Keyboard continued K L M N O P Q ...
Page 340: ...12 102 Symbol DS3407 Product Reference Guide Alphanumeric Keyboard continued R S T U V W X ...
Page 342: ...12 104 Symbol DS3407 Product Reference Guide Alphanumeric Keyboard continued d e f g h i j ...
Page 343: ...Advanced Data Formatting 12 105 Alphanumeric Keyboard continued k l m n o p q ...
Page 344: ...12 106 Symbol DS3407 Product Reference Guide Alphanumeric Keyboard continued r s t u v w x ...
Page 345: ...Advanced Data Formatting 12 107 Alphanumeric Keyboard continued y z ...
Page 346: ...12 108 Symbol DS3407 Product Reference Guide ...
Page 356: ...A 10 Symbol DS3407 Product Reference Guide ...
Page 364: ...B 8 Symbol DS3407 Product Reference Guide ...
Page 365: ...Appendix C Sample Bar Codes Code 39 UPC EAN UPC A 100 123ABC 0 12345 67890 5 ...
Page 367: ...Sample Bar Codes C 3 PDF417 Data Matrix Maxicode ...
Page 368: ...C 4 Symbol DS3407 Product Reference Guide QR Code US Postnet UK Postal ...
Page 372: ...D 4 Symbol DS3407 Product Reference Guide ...
Page 384: ...E 12 Symbol DS3407 Product Reference Guide ...
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