Digital Voice

I had a bit of an epiphany when I realised that a soundwave, by its very nature, is analogue. Just like a CD player, which is digital, has to convert the signal to analogue (by way of a digital to analogue converter DAC) before the listener can hear the music, Digital Voice must do the same. At some point before the signal reaches the listener’s ears, it has to be converted to a soundwave (analogue). I find this extremely annoying because it is the transfer of signal that is digital and not the end result (the voice on the phone), which has to be analogue.

It’s kind of like the adverts that tell you getting a smart meter will save you money, it won’t. What it might do is encourage a change in behaviour which then may save you money. In the same way, the voice on the phone is not digital but the way it gets there is.
 
I wondered about people with no broadband (my mum as an example…82 years old and doesn’t want to be bothered with all that ‘technical guff’). I found this article and it looks as if these broadbandless people will get a router with the broadband connectivity part disabled that allows their phone to be plugged in and then used as normal. This seems like a sensible thing to do because internet connectivity can easily be switched on if the customer has a change of mind. I found this article the most helpful information I’ve looked at so far.
 
I had a bit of an epiphany when I realised that a soundwave, by its very nature, is analogue. Just like a CD player, which is digital, has to convert the signal to analogue (by way of a digital to analogue converter DAC) before the listener can hear the music, Digital Voice must do the same. At some point before the signal reaches the listener’s ears, it has to be converted to a soundwave (analogue). I find this extremely annoying because it is the transfer of signal that is digital and not the end result (the voice on the phone), which has to be analogue.
Considering all of the other mechanical and electronic processing the audio signal needs to go through, I wouldn't be too concerned about digital conversion. In most cases, the digital signal allows for less signal degradation. Start with the microphones and speakers and one typically already has a significant reduction in dynamic range. Then, there is amplifier circuitry, which does not treat all frequencies equally. For analog broadcasts, signals are modulated up to a higher frequency and then demodulated down. This injects signal loss similar to digital sampling rates. Then there is basic electronic noise -- 60 Hz being the biggest culprit -- that needs to be filtered out and thereby distorting original frequencies at that range.

In many ways, digital provides cleaner sound by avoiding transmission media distortion and noise. Analog was never a 'pure' sound following the introduction of recording and transmission equipment.
 
In many ways, digital CAN provide cleaner sound by avoiding transmission media distortion and noise. Analog was never a 'pure' sound following the introduction of recording and transmission equipment.
(I've added the above "can")

Years ago I connected my TV to satellite (Sky in those days) for the first time. At that time there was still a terrestrial analogue signal available. The digital satellite signal is naturally heavily compressed to increase bandwidth on the transmission. This is not normally very apparent but when I switched between the satellite signal and the terrestrial signal on the same TV channel (whilst watching a classical concert in fact) there was a marked improvement with the terrestrial analogue signal with a much greater depth and range of tone.

This is not an inevitable result of digital but a result of the compression being used (note most mp3 files suffer similarly). Note that I'm also not a great believer in vinyl is better - maybe it is but my ear's not that good - but that is a different comparison when made against uncompressed CD quality digital music. So digital can be better if the sample rate is higher enough and there's no compression.
 
I thought it only fair that, after all my complaining, I should give a progress report. The new Digital Voice service began yesterday and everything seems to be fine. It was a fairly straightforward experience and an easy task to link my phone to the router. I don’t know how easy it would be if I changed routers and had to re-link the phone but that’s for another day,

The phone itself seems to be of good quality and my only criticism is that it didn’t come with a manual (this is rapidly becoming the norm and I should probably post about it in the pet hates thread). I did find and download the manual online so at least I have some info if things go wrong.

My phone socket no longer needs the adsl filter so that’s been chucked and one less connection means one less thing that can go wrong. All in all, a good transition. All I need to do now is hope there are no power cuts or internet problems in the middle of any important phone calls. In truth, the vast majority of the few calls are make are not that important. :)
 
I've just spotted this thread and it explains a minor issue today.

I had some guy cold calling at my door, he had a BT pass on a lanyard, he started off with some spiel about ADSL filters. I assumed he was trying to get me to sign up for a different broadband deal, so in my usual pleasant manner I told him to f*** off and slammed the door in his face while he was still chattering away.

Later today on local Facebook somebody complained because "a strange woman" was also going around trying to gain access and take a quick look at their phone connection.

Looking back now they've probably been trying to make us all aware of the changeover
 
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The changeover isn’t until 2025 so I’d be wary of anybody wanting to gain access to your home. There’s no need, as far as I am aware, for any change to your phone socket. All I did was remove the ADSL filter and that was that. It was there to separate broadband and phone but, as my phone is now via broadband, filter no longer required.
My changeover occurred without any need to allow anybody (BT or otherwise) into my home.
 
Change is difficult...I remember deciding to get rid of landline--Was hard choice.
Way things are changing I have to change my shopping list and habits.
After all the changes:
Get more amo
Get Tazer
Get extra medical supplies.
Get lots of H2O
Get cheap defibrillator(wonder if tazer will work?)
...
 
I thought it only fair that, after all my complaining, I should give a progress report. The new Digital Voice service began yesterday and everything seems to be fine. It was a fairly straightforward experience and an easy task to link my phone to the router. I don’t know how easy it would be if I changed routers and had to re-link the phone but that’s for another day,

The phone itself seems to be of good quality and my only criticism is that it didn’t come with a manual (this is rapidly becoming the norm and I should probably post about it in the pet hates thread). I did find and download the manual online so at least I have some info if things go wrong.

My phone socket no longer needs the adsl filter so that’s been chucked and one less connection means one less thing that can go wrong. All in all, a good transition. All I need to do now is hope there are no power cuts or internet problems in the middle of any important phone calls. In truth, the vast majority of the few calls are make are not that important. :)
So, were you provided with a new router, @Foxbat and, if so, how many LAN ports has it?
 
i’m
So, were you provided with a new router, @Foxbat and, if so, how many LAN ports has it?
No. I’m still using the same router. I followed the instructions and checked the rear and lo and behold, there was the sticker that was mentioned. Peeling back that sticker revealed a socket to plug a standard landline phone straight into the router. The standard, up to date BT router has four LAN ports plus the phone socket (hidden by the sticker). I’m not actually using the old phone but it’s there if I want to. I’m quite happy with the Alexa phone I was sent and you don’t have to activate Alexa if you don’t want to (and I really don’t want to).
 
I was switched (well, the exchange end of the process was switched) over to digital telephony overnight... which was a bit of a nuisance as I had to call the dentist first thing.

Anyway, my end of the switchover went well (once I discovered that the telephony port on my router was hidden under a label with tiny, tiny writing on it), but then things got weird: I received three SMS voice messages from BT. The first said, "Thanks." The following messages went on about how I could complete the switchover (i.e. do what I had already done). If I had not already done this, I would have been unable to access the SMS messages. o_O

After I'd listened to them all (and saved the last two... but they're only stored for 1 day), the SMS service then told me how I could use and control SMS voice messaging, all said quite quickly and, because it wasn't itself an SMS message, I couldn't save it. There was, for those who'd not given up and cleared the call, a mention of where to find the information on the BT website right at the end.

For part of a communication company, BT's Digital Voice people seem to have little grasp of how and when to communicate.


By the way, as I use DECT (or whatever might have replaced it) phones, I'm already dependent on the power being on to make and receive calls, so Digital Voice makes no difference to me in terms of availability.
 
So did you print out that manual or just save it to your browser?

I'm wondering how you'd access any info if your power went
About 15 years ago I was based in a building on a nuclear reprocessing site.
They'd made a big thing about going paperless with all their plant instructions online, for some reason they decided to do the same with all the localised emergency instructions.
At the urging of myself and others they printed out one copy of each instruction, but instead of keeping them in the general office they put them in a storeroom adjacent, one instruction per folder.
Time passed and then I found myself tasked with carrying out a series of building exercises, one per month and then writing a report.
I looked at the previous reports by others and found they were simply paperwork audits, a quick chat with a safety advisor and I had the green light to be a bit more intrusive. Then the fun began!!

I walked in one morning with my clipboard and a colleague, I flipped the main switches to shut off the power and told him to stay there and not let anyone turn them on.
I walked to the offices by emergency lighting and slapped a large printout onto the building controller's desk.
"EMERGENCY EXERCISE UNDERWAY (INSTRUCTION 06) SUDDEN LOSS OF PLANT POWER."
He muttered a curse and stormed off to the storeroom, pitch black! He flipped the switch and nothing "Danny you *******!"
He saw a torch in my hand "lend me that"
"Sorry no, you should have brought your own, you're the controller"
Anguished snarl and back to his office, lots of rummaging in his desk drawers while more and more people gathered round "the powers gone off, what do we do?"
Eventually he found the instructions, step one was to evacuate the building, that's when he learned his PA system wouldn't work without power so he had to dispatch runners and then organise a head count outside.
45 minutes of blundering, he submitted a complaint about receiving no warning of this emergency exercise, an area manager appeared that afternoon, got both our stories, commended me and proper tore him and the paperless system to shreds.
Within a week all the active side building controllers had bright orange folders on little shelves beside their desk with the logo LOCAL EMERGENCY INSTRUCTIONS.
And the tannoy systems were upgraded.
 
This would pretty much be where I would be with Digital Voice.

It’s the power cut issue that concerns me the most because, dependent on what caused that cut, it might be the time when you most need access to a phone.
Doesn't need to be power cut. My mum is 85 and was getting very upset and bewildered when her phone stopped working. It turned out she had switched off the socket it was plugged into not realising her phone was now depedant on being connected to the mains. Took us some time to work out what had happened. Luckily she lives next door and the travel time was minimum but I hate to think how elderly people who don't have family close would deal with such a situation. My mum just had to walk down her garden path and call into our kitchen.
 
So did you print out that manual or just save it to your browser?

I'm wondering how you'd access any info if your power went
If the power went out I wouldn't be able to use my phone no matter how many manuals I looked at....

I usually download any manual I consider important to my kindle. I can't remember if I considered this important enough.
 
I was about to renew my broadband contract and save a couple of quid a month but, when I was about to checkout, a window opened informing me that I would be receiving Digital Voice. I didn’t bother renewing for now and did a little digging on this and here’s what I found.

Apparently, everybody needs to move to Digital Voice by 2025 (even people without an internet connection). This is because, just like our TVs a few years ago, the telephone network is going digital. It all sounds very reasonable but….read on MacDuff…

You have to plug the phone in to the router BT provide or use an adaptor. It seems that ADSL filters will no longer be required. For structural reasons, my phone is nowhere near my router. I had to run about ten metres of cable to get the router to a power source. Those of us old enough to remember will know that the phone socket location never used to need to be situated anywhere near mains electricity. And, still wallowing in nostalgia, here’s something else I learned.…Because the phone (whether directly connected to the router or via an adaptor) is essentially being piggybacked on to broadband, guess what happens in a power cut? You lose your phone connection.

It used to be the case (and still is) that the phone network ran on banks of batteries so was not affected by any loss of mains electricity. And here’s something else. This loss of phone connection due to power loss includes 999 calls to the emergency services. The advice from BT? You’ll have to use a mobile. That’s all well and good if you have a mobile but there are still some of us who don’t use them. And what happens if a power cut includes the supply to phone masts? Some masts have backup sources but not all.

I’ve never liked the idea of a mobile phone containing all my data (banking, billing, credit cards etc) and I’ve never liked the idea of doing everything over the internet. Now, our last line of communication will be subjected to the same risk as we finally put every single egg we have all in one basket.

Imagine the chaos that could ensue when our paperless world is subjected to an energy crisis (crisis? what crisis?) and blackouts start occurring with a frightening regularity. No phone. No bank. No money. No TV. No fire brigade for your burning house (unless you have a mobile and are part of a network that has somehow survived the power cut)

The latest on Digital Voice.



We’re almost there folks;)

P.S. I’ve decided not to renew my contract and take the financial hit of a slightly higher bill because I just don’t like where this is going.
Hi Foxbat,
Ironically, Our broadband, had a service interruption for 18hrs last weekend, our modem/wifi router was not in connexion with the network. About 3 years previously, if memory serves, the landline was integrated by our provider with our brtoadband TV package and routed through the wifi router and disengaged from the BT infrastructure.... so we experienced our first loss of landline connectivity as we now use a link cable from the "landline" base unit directly to the modem, (hard-wired), where our provider already piggy-backs all "landlines" onto their broadband network.

Our backup was, of course, our mobile phones. Our mobile phones, however, in the event of a provider-side powercut/ accident/ hacking terrorism etc, or a future "integration" of "landlines" with other services eg: 5g; 6g; 7g; "something as yet unknown g" etc; (as well as people with a backup mobilephone not being able to replenish their device's batteries), .....those without some truly independant form of backup are in deep doodoo....
 
Our mobile signal here is on the flakey side anyway.
Back in the 90s there was a big roll out of optic fibre cable to half the town in which we lived. You could get TV on it (better signal) and phone. The phone was intermittent, because it had limited capacity and at busy times you couldn't get a dial tone.
 
those without some truly independant form of backup are in deep doodoo
Luckily, my car** can power my mobile phone...

...but none of the phone companies' masts and other infrastructure....​
** - Being a PHEV, it has a rather large battery, which I can charge using the petrol engine if needs must.
 

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