@ Graham
'Network Settings', "Connection Status"
Wireless Connection (WLAN) OK
Internet OK
IP Address 192.168.1.102
Netmask 255.255.255.0
Gateway Address 192.168.1.1
Primary DNS Server 192.168.1.1
Secondary DNS Server 0.0.0.0
Wired Connection (LAN) OK works with DHCP or Manual
Internet OK
IP Address 192.168.1.158
Netmask 255.255.255.0
Gateway Address 192.168.1.1
Primary DNS Server 192.168.1.1
Secondary DNS Server 0.0.0.0
The main router is Vodafone model THG3000 vox3.0 (made in Vietnam by Technicolor)
firewall ON
port mapping none
Static NAT/DMZ Off
DNS 8.8.8.8 (google)
DNS2 8.8.4.4 (google)
UPnP ON
DHCP ON
The AP is Zyxel AMG1302-T11B (DHCP OFF) wired through main router THG3000
There is no problem when using a wired connection (either direct from THG3000 or through Zyxel AMG1302-T11B, both work OK