Denso BHT-904B - Page 131

117
Barcode Handy Terminal
PING Echo Request Transmission Timing (SEND TYPE)
Two types of echo request send timings are available: TYPE 1 and TYPE 2.
After sending an echo request, PING waits for the period specified at IN
ionship between the INTERVAL a
NTERVAL  TIMEOUT.”
Af
:
If a timeout occurs:
■TYPE1
TERVAL and then sends an echo
nd TIMEOUT should be request again. For TYPE 1, the relat
“I
■T
Y
PE2
ter sending an echo request, PING waits for an echo reply to
Sends an echo request
Receives an echo reply
Timeout period
Interval
Sends an echo request
be
received or for a timeout to occur.
Following that, PING waits for the period specified at INTERVAL and then sends the next PING echo
request. For TYPE 2, no relationship between the INTERVAL and TIMEOUT is required.
If PING receives an echo reply
Sends an echo request
Receives an echo reply
Interval
Sends an echo request
Sends an echo request
Timeout period
Timeout occurs
Interval
Sends an echo request