Symbol LS 1004 Product Reference Manual page 73

Hardware Handshaking
Hardware handshaking allows you to check the readiness of the receiving device before data
is transmitted. If the receiving device is periodically occupied with other tasks, hardware
handshaking is needed to prevent loss of transmitted data.
Select whether the scanned data is to be transmitted as soon as it is available or whether
transmission should follow the RTS/CTS procedure.
None
Software Handshaking
This parameter offers control of the data transmission process in addition to, or instead of,
that offered by hardware handshaking. These options may be combined; for example, ACK/
NAK with ENQ.
No software handshaking
!
ACK/NAK only
!
The ACK/NAK option checks the success or failure of transmission. The scanner
expects one of the following host responses after a data transmission:
<ACK> acknowledges a valid and successful transmission.
<NAK> indicates a problem with the transmission.
Whenever a NAK is received, the unit retransmits the same data and awaits an ACK/
NAK response. After three unsuccessful attempts to transmit the same data, the
scanner aborts any further communication attempts of that message.
None
ACK/NAK
Programming the LS 1004
RTS/CTS
4-37