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Introduction
Raw UDP mode
Note: Raw UDP can provide
one-to-many communications.
Identifying Quatech's SDS product line
Note: All models are available
with surge suppression as an
–SS option. For example, the 4-
port RS-232 unit with DB-9
connectors and surge suppression
would have a part number of
QSE-100D-SS.
Note: SDS products with a "W"
in their part numbers (such as
SSEW-100) implement Wi-Fi
technology. They provide serial-
to-wireless communications in
addition to all standard SDS
functions.
System requirements
Page 4
IP address and TCP port number of the network host to which it
should connect. If the SDS is idle, it will listen for normal Raw TCP
mode connections from the network host.
Raw UDP is used primarily for broadcasting messages over a network.
It is lightweight and efficient; however, your application program
must handle all error processing and retransmission. Quatech
supports the following modes of UDP communication:
Multicast (transmits to specified group of recipients)
Broadcast (transmits to unspecified recipients)
Point-to-Point (transmits to one recipient)
Quatech provides a family of SDS products. SSE-100, DSE-100, QSE-
100, and ESE-100 provide one, two, four, and eight RS-232 ports for
your serial devices, respectively. SSE-400, DSE-400, QSE-400, and
ESE-400 allow you to software-select between RS-232 and RS-
422/485 communications. For convenience, this manual refers to all
these products as SDS unless otherwise noted.
Table 1 - SDS models
RS-232
RS-232/422/485
Ports
Device
Device
SSE-100
1
SSE-400
DSE-100
2
DSE-400
QSE-100
4
QSE-400
ESE-100
8
ESE-400
Quatech's SDS products all perform the same function (see notes),
differing mainly in the number of serial ports available or in the
serial protocol supported. All "D" models, which add a suffix of D to
the part number, (e.g. SSE-100D) are supplied with DB-9 connectors.
All "M" models, which add a suffix of M to the part number, (e.g.
QSE-100M) are supplied with 10-pin RJ-45 adapters that attach to
the DB-9 connectors.
Quatech's SDS ships with device drivers for Windows 2000, Windows
NT4, Windows XP, and Linux. Other operating systems can access
the SDS using Raw TCP mode or the IntelliSock™ TCP socket
services. Quatech will provide reference materials and utilities to
assist those who wish to do so.
Contact our sales department for details on current software
offerings. Most device drivers are available for download from the
Quatech World Wide Web site at http://www.quatech.com/.
940-0183-153
Quatech SDS User's Manual
July 2005
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