Справочное Руководство для LXE 1280
System Overview
9
E-SW-LDSPLUSRG-G
LDS Plus Reference Guide
Outbound Messages
An outbound message is a message initiated by the host computer and sent to the TM1/6224. The
TM1/6224 forwards the message to the DOS computer.
TM1/6224 forwards the message to the DOS computer.
The diagram below shows the basic steps and data path of both inbound and outbound messages.
1.
The computer
operator presses
the SEND key
to transmit
the message.
the SEND key
to transmit
the message.
2.
The RFU
receives the
message and
passes it on
to the TM1
or 6224.
message and
passes it on
to the TM1
or 6224.
3.
The TM1/
6224 receives
the message
and passes the
ACK to the AP.
the message
and passes the
ACK to the AP.
4.
The AP
passes the
ACK to the
computer.
ACK to the
computer.
6.
The host
sends the ACK
(Roger) to the
TM1/6224.
(Roger) to the
TM1/6224.
5.
The TM1/
6224 sends an
ACK to the
computer and
then sends
the message
to the host.
ACK to the
computer and
then sends
the message
to the host.
RF COMPUTER
ACCESS POINT
TM1 or 6224
HOST
COMPUTER
Figure 1-2 Inbound/Outbound Message Path
Host Retry Attempts
An LDS host computer expects an acknowledgment for each message that it sends. If the host
computer does not receive an acknowledgment, it may retry the message depending upon how the
software is written.
computer does not receive an acknowledgment, it may retry the message depending upon how the
software is written.