SMC Networks ElliteConnect 2.4GHz/5GHz - Manual (Page 271)

Wireless Interface Commands
7-101
closed-system
This command closes access to clients without a pre-configured
SSID. Use the no form to disable this feature.
Syntax
closed-system
no closed-system
Default Setting
Disabled
Command Mode
Interface Configuration (Wireless)
Command Usage
When SSID Broadcast is disabled, the access point will not
include its SSID in beacon messages. Nor will it respond to
probe requests from clients that do not include a fixed SSID.
Example
speed
This command configures the maximum data rate for transmitting
unicast packets on the wireless interface.
Syntax
speed <speed>
speed - Maximum access speed allowed for remote bridges.
(Options: 802.11a: 6, 9, 12, 18, 24, 36, 48, 54 Mbps;
802.11g:1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, 54 Mbps)
Default Setting
54 Mbps
AP(if-wireless g)#closed-system
AP(if-wireless g)#