Symbol DS6707 Product Reference Manual page 134

8 - 14 Symbol DS6707 Digital Imager Scanner Product Reference Guide
Software Handshaking (continued)
•
XON/XOFF: An XOFF character turns the digital imager scanner transmission off until the digital imager
scanner receives an XON character. There are two situations for XON/XOFF:
• XOFF is received before the digital imager scanner has data to send. When the digital imager scanner has
data to send, it waits up to Host Serial Response Time-out for an XON character before transmission. If
the XON is not received within this time, the digital imager scanner issues an error indication and discards
the data.
• XOFF is received during a transmission. Data transmission then stops after sending the current byte.
When the digital imager scanner receives an XON character, it sends the rest of the data message. The
digital imager scanner waits indefinitely for the XON.
XON/XOFF
*
None
ENQ
ACK/NAK
ACK/NAK with ENQ