Thanks for the thought But I am reluctant to try as the router arrived with this latest software version (unless I wasn't paying attention and it upgraded itself) It does not appear that TP-link are...

Same router (Firmware Version: 3.14.7 Build 130424 Rel.72646n Hardware Version: WDR4900 v1 00000000) Gigaset VOIP N300A IP (Hybrid DECT IP base station for landline and VoIP calls) At first this...