Ericsson W21 - Manual (Page 21)

Configuration and Management
Figure 14 - Wireless LAN: Radio Channel page
Select either “Auto” (recommended) or a specific channel number from the
“Radio channel” drop-down list.
Click Next to proceed.
2.3.2.4 Network Name
All devices on the local wireless network share a common Service Set
IDentifier (SSID) or network name. This name is required to establish
connection between the Ericsson W21 and the wireless client(s), and to
distinguish the wireless network from any other(s) that may be in use
nearby. Only devices configured with the same network name as the one
set on the Ericsson W21 can obtain access to it.
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