User guide

AirCard 781S Mobile Hotspot User Guide
48 2400389
3. Click the Options tab.
4. For the Main Wi-Fi and Secondary / Guest Wi-Fi networks, select the desired
options. (Note: If you are using a predefined Wi-Fi Profile and you change any
values in the Main Wi-Fi or Guest Wi-Fi sections, the Wi-Fi Profile will be marked as
a Custom Setup.)
· Frequency — The Wi-Fi frequency range used for the selected network. 2.4 GHz
uses less power and is longer ranged than 5 GHz, but 5 GHz can provide higher
speeds with less interference.
· Mode — The WLAN protocol being used. The recommended value depends on
the Frequency range selected:
· 2.4 GHz — 802.11 B/G/N
· 5 GHz — 802.11 A/N
· Channel — The Wi-Fi channel used. The recommended value is Auto, which
chooses the channel that will provide the least interference.
5. In the Connection and Security sections, you can edit these options:
· RTS Threshold — The smallest packet size (in bytes) used by the Request to
Send/Clear to Send handshaking protocol. The recommended value is 2347. If
you are experiencing inconsistent data flow, you can make minor changes to this
value to try to alleviate the problem.
· Fragmentation Threshold — The largest allowable size (in bytes) for a packet. If
the packet is larger than this, it is sent in multiple packets, which can affect
network performance. It is recommended to keep this value as large as possible
(up to 2346).
· Broadcast Network Name — If you select Show, your Wi-Fi network name
(SSID) will be broadcast to devices within Wi-Fi range. (Select Hide if you do not
want it broadcast.)
Note: The Mode field usage is explained in Change Wi-Fi encryption settings on page 41.
6. Click Submit. (Submit button appears once you make a selection.)
Set MAC Filter mode
You can use MAC (Media Access Control) filtering to block unauthorized Wi-Fi devices
from accessing your Wi-Fi network (Black list on page 49), or permit only authorized
Wi-Fi devices to access the network (White list on page 49), based on each device’s
MAC address.
Note: Only one list can be active at any time — either the black (block) list or the white (allow)
list.
Note: The MAC filtering black list is also referred to as the block list. See View connected devices
on page 24 for another method of blocking connected devices.