SCANTECH ID (Champtek company) SG20 - Manual (Page 4)

Interface Manual Scantech SG-20 Discovery WLAN Rel 1.1 2
IN GENERAL
The Discovery/WLAN links to 802.11b/g and Ethernet networks using the IP protocol family (TCP
for connection-oriented stream applications and UDP for datagram applications). The main benefit
is providing network connectivity. The unit is connected through a TCP data channel or through a
Telnet connection to host computers or other Device Servers.
NETWORK PROTOCOLS
The Transmission Control Protocol (TCP) assures that no data is lost or duplicated, and that every-
thing sent to the connection arrives correctly at the target. For typical datagram applications in
which devices interact with other devices without maintaining a point-to-point connection. The
Internet Protocol (IP) defines addressing, routing, and data block handling over the network.
INTERNET PROTOCOL (IP) ADDRESS
Every device connected to an IP network must have a unique IP address. This address is used to
reference the specific Discovery. See further for more information on IP Addressing.
ETHERNET (MAC) ADDRESS
The Ethernet address of the individual SG-20 terminal, also referred as the (unique) hardware
address or the MAC address, can be found on the back of the SG-20 Discovery, as well on the
small WLAN module inside the Discovery, mounted next to the internal bar code scanner. The first
three bytes of the Ethernet address are fixed (e.g. 00-20-4A), identifying the unit as a Scantech
product. The fourth, fifth, and sixth bytes represents a unique number assigned to each unit.
Sample Ethernet Address : 00-20-4A-52-4B-19.
DHCP
The SG-20 Discovery WLAN is shipped with a default IP address set to 0.0.1.0, which
automatically enables DHCP within the Discovery. Provided a DHCP server exists on the network,
it will supply the SG-20 Discovery with an IP address when the SG-20 boots up.
WLAN/LAN module
The WLAN module inside the SG-20 is capable of interfacing with 802.11b/g Wireless
and 10/100 wired Ethernet network (which can be reached on the RJ45 connector on
the back side of the Discovery).
Only one interface can be used at the same time.
How to switch between these, is handled in this manual.