Cisco 800-series devices have embedded AP in them.
Here is an example of simple configuration of wireless network on these routers (851W, 871W еtс).
In this example Network SSID: WiFi-SSID
Encryption is WPA-TKIP
WPA key: wpakey01
dot11 ssid WiFi-SSID vlan 1 authentication open authentication key-management wpa guest-mode wpa-psk ascii 0 wpakey01 bridge irb interface Dot11Radio0 no ip address ! encryption vlan 1 mode ciphers tkip ! ssid WiFi-SSID interface Dot11Radio0.1 encapsulation dot1Q 1 native no cdp enable bridge-group 1 interface BVI1 ip address 10.23.45.1 255.255.255.0 ip nat inside ip virtual-reassembly bridge 1 protocol ieee bridge 1 route ip
You will probably want to have DHCP for wireless clients as well:
ip dhcp pool WiFi network 10.23.45.0 255.255.255.0 default-router 10.23.45.1 dns-server 220.127.116.11 18.104.22.168
Don’t forget to add new wireless network to your NAT rule, in order to reach out the Internet.