User manual Version 2.3
ABLELink
Serial-Ethernet Server
GW21W
Wireless LAN ESSID
ESSID (extended service set identification) is used to identify all of the computers in the wireless LAN
system, it is different from BSSID (basic service set identification) which contains a single access point
(AP) and several other nodes. The following diagram illustrates this concept:
By default, GW21W’s ESSID is NULL meaning that it can connect to any access point it detects
regardless of SSID of the access point. However if there are two access points within the coverage of
GW21W, it will not connect to either of them, in this case you have to specifically input the ESSID of one
of the access points for connection. From telnet you can input ESSID as indicated in the following figure:
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