Panasonic Workio DP-3510, Service Manual

Page: 440 / 858

440
JAN 2006
Ver. 5.2
DP-3510/3520/3530/4510/4520/4530/6010/6020/6030
The client generates random sequential numbers initially and sends them to the server. The initial
sequential numbers are synchronized with the clock and increments the counter every 4 msec.
The Server responds with an acknowledgement that increments the initial sequential number by one. The
ACK bit number is also changed to a "1" value. The "SYN" can have and identical "ACK" response for each
packet, thus, the server and the client can establish a connection.
SYN, Sequential No
.=4538970
ACK, ACK No
.=4538971
SYN, Sequential No
.=1919424000
ACK, ACK No
.=1919724001
Server
Panasonic
Device
Increments No. sequentially
TCP 3 Handshake General Flowchart
Client