User manual Version 2.3
ABLELink
Serial-Ethernet Server
GW21W
A.2. Software Specifications
Item
Specifications
Protocol
TCP, UDP, ARP, ICMP, SNMP, HTTP, Telnet, BOOTP, ICMP, DHCP
Configuration
Configuration information for both TCP/IP and serial ports is kept in the
EEPROM.
Configuration utilities of Windows95/98/2000/NT/XP/2003 are provided
for configuring settings.
Telnet, RS-232 console, web server configuration.
Internal Buffer Size
TCP receiving buffer size = 8K bytes
TCP transmitting buffer size = 16K bytes
RS-232/RS-485 receiving buffer size = 4K bytes
RS-232/RS-485 transmitting buffer size = 4K bytes
A.3 Connector Pin Assignments
A.3.1 COM Port
9 pin D-type connector
1
2
6
7
3
5
4
9
8
COM ports may be either the RS-232 full duplex or the RS-485 2/4 wires.
Pin#
RS-232
Full Duplex
RS-485
2 wire, Half Duplex
RS-485
4 wire, Full Duplex
1
DCD
N/A
N/A
2
RXD
N/A
N/A
3
TXD
DATA-
RXD-
4
DTR
N/A
(reserved)
TXD-
5
SG (Signal Ground)
SG (Signal Ground)
SG (Signal Ground)
6
DSR
N/A
N/A
7
RTS
N/A
N/A
8
CTS
DATA+
RXD
+
9
RI
N/A(reserved for Atop
devices)
TXD+
Copyright © 2003 Atop Technologies, Inc.
All rights reserved. Designed in Taiwan.
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