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Hi @Stiles2013 . Is this an Archer AX50?
Is there a reason for keeping the VR1600 as the main router?
Are you using the VOIP phone or are you on FTTB/N?
On the AX50, change its ip address to, say, 192.168.1.2. Disable DHCP and NAT. Connect LAN port to LAN port.
You can disable wifi on VR1600 and just use the AX50.
The remaining 3 ports on each router are useable.
@Stiles2013 . If you turn off VR1600 wifi, the AX50 wifi might be sufficient. If not, the AX50 should be cabled up several metres away to spread the wifi coverage.