Hi Trebor1961, do you use an adsl filter like these?:

https://www.ebay.co.uk/itm/ADSL-Micro-Filter-Broadband-BT-Telephone-Phone-Microfilter-Splitter/171704953192?_trkparms=aid%3D555017%26algo%3DPL.CASSINI%26ao%3D1%26asc%3D55148%26meid%3Daa40754949424b8fa27e88849953003a%26pid%3D100505%26rk%3D1%26rkt%3D1%26%26itm%3D171704953192&_trksid=p2045573.c100505.m3226

Maybe if you do already it is faulty & needs to be replaced? You need one to split the broadband for the phone & the internet at the same time. Every time the phone rings it will affect the connection with a faulty filter or no micro filter fitted. Hopefully this may help you solve your problem.

Trebor1961 – 3 hours ago  » 

I have just bought a Humax HDR1100s Freesat and when I connect it to the internet using the existing cable from when I had sky it stops the phone from working.

Could you explain what you mean by “stops the phone from working” eg is the phone completely dead or a screeching noise on the line or something else.

As Wee as answering the above questions can I add some more:

1. What type is the phone (DECT?) and what is it connected to? a conventional wall socket or a ISP boxe? If a DECT phone how near is it to your Humax?

2. Without the Humax connected to the router by cable. what other kit was connected to the router and could you use both at the same time?

Here in France all old POTS type phone services are due to be discontinued, this year I think, as hardly anyone uses them now.