User's Manual

ACK
TX1
ACK
RX
NACK
TX2 TX4RX
RX
ERR
TIME
OUT
RX1 RX2
RX
NO
RX4
TX3
WAIT
RX
ACK
RX
NACK TIME OUT
Support TTY (TELE TYPE) OPERATION -
Use TTY to send commands and messages.
NACK
TX3
RX3
NACK
GNET FEATURES
Simple handshaking -
One enquiry one answer back.
Multi-link capability
Expandability -
GNET provides 4 major functions:
1. POLLING
2. LOGIN / LOGOUT
3. DATABASE
4. INFORMATION
Also can be expandable.
Simple format
Use ASCII value for each field and use Separator "," between two
Fields.
GNET Handshaking
STX CMD CONTENTS CHKSUM CR
GNET PACKET
STX
CMD
CONTENTS
CHKSUM
CR
2 ^B Start of Text 02
STX REPLY CONTENTS CHKSUM CR
ITEM Dec Control Key Function Hex
13 ^M Carriage Return0d
Ascii Ascii Command CodeAscii
Ascii Ascii Contents DataAscii
Ascii Ascii Check SumAscii
REPLY (78) 65 (N) A (Negative) Acknowledge(4e) 41
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