This topic

Digital voice problem

tango2 — Sat, 16 Jul 2022 23:55:06 GMT

We had full fibre 100 installed on wednesday, but there appears to be a problem with our phones.

Before the engineer left the speed test I ran was 149mbps, twice, which was exactly what I expected. At the time none of the cordless phones were working but he said that shouldn't be too long and left. In the meantime I did several tests and they were all 140+

Few hours later the phones started working and since then the speeds have dropped to 10-20mbps every single test. Speed to the hub is right (150) but not to the devices. I had been getting 70mbps on infinity so really unimpressed by this.

The phone base station was plugged into the dv adapter, so I unplugged it and ran a test and it was back up to 150 again. I've tried plugging it into the back of the smart hub 2 to see if it was a faulty dv adapter but the speed test drops back down to 20mbps.

Re: Digital voice problem

jac_95 — Sun, 17 Jul 2022 05:37:16 GMT

Hi tango2,

Thanks for the post and welcome to the Community.

This is an automated response as I can see you have a question about BT’s Digital Voice service. Rather than waiting for a response from the Community, you may find an answer to your question by using the search bar on the Community homepage. We also have a thread that contains a wealth of info related to BT’s Digital Voice, click this link to take a look, Digital Voice FAQs.

If you have already looked for the answer to your question and have not found anything that can help, then please ignore this message. One of our Community members will be along shortly to help you further.

Re: Digital voice problem

Bob1001 — Sun, 17 Jul 2022 09:42:43 GMT

@tango2 Whilst it should not cause any problems as the adapters use DECT and not WiFi, mine is fine.

It would be worth trying plugging your main phone into the hub to see if that works without any problems, if so it does seem that the adapter is giving problems the only thing I can think of if the adapter is giving the problem is it too near to anything you are using with WiFi as DECT can sometimes interfere with WiFi although the frequencies do not overlap.

Re: Digital voice problem

tango2 — Sun, 17 Jul 2022 10:40:32 GMT

Fixed it - sort of.

The only way I get 150 is if I plug a micro filter into the dv adapter or the back of the hub and that is the same for both cordless and corded.

Not ideal but it works.

Edit - no it's not fixed.

I ran 4 speed tests and all 149. Called my landline from my mobile and after that all tests are back down to 20

Re: Digital voice problem

tango2 — Tue, 19 Jul 2022 10:41:03 GMT

Flawless with no phone plugged in, drops to 20 when plugged in.

Tried corded and cordless, in the back of the hub with and without filter, in dv adapter with and without microfilter.

Don't know what else to try.

Could it be the firmware - v0.33.00.12274

Re: Digital voice problem

tango2 — Tue, 19 Jul 2022 10:57:57 GMT

I don't want to go to the expense of replacing 4 handsets incase the phones aren't the issue.

Re: Digital voice problem

imjolly — Tue, 19 Jul 2022 11:08:14 GMT

some older style phones work better with the filter fitted and that often helps old phones ring so that maybe applies to you. if so just keep using the filters

Re: Digital voice problem

tango2 — Tue, 19 Jul 2022 11:20:40 GMT

The filters don't make any difference. The only way I can get full speed is with the phones unplugged.

Wish I had never upgraded now. Consistent 70mbps on infinity now I'm lucky if I get 30.

Re: Digital voice problem

Anonymous — Tue, 19 Jul 2022 11:25:05 GMT

I doubt that it's the phones but a couple of things to try would be to deregister one of the handsets from the base & then pair directly to the hub. That bypasses your base station completely. If still the same beg or borrow an old analogue phone from somewhere to try.

My guess is that the SH2 must have some sort of QoS to maintain bandwidth for DV use & yours has gone a bit haywire, hogging nearly all the bandwidth. I don't think that's user configurable anywhere so a replacement SH2 is the quickest way to prove that. Either try & get BT to supply one or my usual suggestion is to see if you can pick one up cheap locally on Ebay or Facebook Marketplace. Once you've used it for testing you can resell for much the same as you paid t tuck it away as a spare.

Re: Digital voice problem

tango2 — Tue, 19 Jul 2022 11:34:51 GMT

I doubt it's the phones too, both the cordless (set of 4) and the corded phone are less than 5 years old I think.

What is the best bt department to call please?

Edit - sorry you lost me a bit there. How do I pair directly to the hub? The engineer wasn't even going to set the phones up for me cos he said he hadn't seen the dv adapter before and I had to tell him what to do.

If you mean plug it in the back of the hub, I have already tried that.

Re: Digital voice problem

imjolly — Tue, 19 Jul 2022 11:34:13 GMT

CS 150 or 0800800150 from mobile

Re: Digital voice problem

tango2 — Tue, 19 Jul 2022 11:49:08 GMT

I have just done back to back tests and this is with the phone plugged in