Switch to Fiber and keep (for now) PSTN line

[#1]

We have no mobile signal no fibre in our area and our copper wire broadband is useless, certainly not reliable enough for reliable VOIP. What happens when the our PSTN is removed ? 

[#2]

@kittyhawk 

To help advise can you post a screen image of the results from the following. Include the narrative but hide your details.

https://www.broadbandchecker.btwholesale.com/#/ADSL

To post inline you click on the reply button and then on the menu link that looks like this.

Brian

[#3]

Real life 

Download speed 7

Upload speed .. non existent

[#4]

VOIP only needs 100k each way, and I had been running it on a 2.5Mb ADSL line.  The upload would have been around 300k for the usual 8:1 ratio.  Yours should be 3x better

OK as long as nothing else was trying to operate. 

[#5]

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@kittyhawk wrote:

We have no mobile signal no fibre in our area and our copper wire broadband is useless, certainly not reliable enough for reliable VOIP. What happens when the our PSTN is removed ? 

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As has been said, the bandwidth requirements for VoIP are minimal. If in the future you can only get ADSL then you will need to move ISP to one that can supply SoADSL. If you were to move to BT, for example, they offer this and Digital Voice. When using this service the BT hub automatically prioritises voice traffic.

What will cause you problems is using a hub that doesn’t include prioritisation facilities, such as the freebies often issued by ISPs that don’t offer a voice service.