I've got a RPi4 with USB keyboard and mouse. It
all works fine but there's a very odd thing, which took me
awhile to figure out: I have to press @ to get " and
I have to press " to get @.
Is that a Pi thing? Linux? Faulty keyboard? International
settings? I've never seen such behavior. Aside from that
it seems to be fine.
I've got a RPi4 with USB keyboard and mouse. It all works fine but
there's a very odd thing, which took me awhile to figure out: I have to
press @ to get " and I have to press " to get @.
Is that a Pi thing? Linux? Faulty keyboard? International
settings? I've never seen such behavior. Aside from that it seems to be
fine.
I've got a RPi4 with USB keyboard and mouse. It
all works fine but there's a very odd thing, which took me
awhile to figure out: I have to press @ to get " and
I have to press " to get @.
Is that a Pi thing? Linux? Faulty keyboard? International
settings? I've never seen such behavior. Aside from that
it seems to be fine.
I've got a RPi4 with USB keyboard and mouse. It
all works fine but there's a very odd thing, which took me
awhile to figure out: I have to press @ to get " and
I have to press " to get @.
Is that a Pi thing? Linux? Faulty keyboard? International
settings? I've never seen such behavior. Aside from that
it seems to be fine.
On 21/12/2020 22:30, Mayayana wrote:
I've got a RPi4 with USB keyboard and mouse. ItThat's an international keyboard thing IIRC.
all works fine but there's a very odd thing, which took me
awhile to figure out: I have to press @ to get " and
I have to press " to get @.
Is that a Pi thing? Linux? Faulty keyboard? International
settings? I've never seen such behavior. Aside from that
it seems to be fine.
In message <rrs8uf$kmf$2@dont-email.me>
The Natural Philosopher <tnp@invalid.invalid> wrote:
On 21/12/2020 22:30, Mayayana wrote:
I've got a RPi4 with USB keyboard and mouse. It all works fine but there's a very odd thing, which took me awhile to figure out: I have to press @ to get " and I have to press " to get @.
Is that a Pi thing? Linux? Faulty keyboard? International settings? I've never seen such behavior. Aside from that it seems to be fine.
That's an international keyboard thing IIRC.
I've lived with this for some time, but on a BeagleBoard running RISCOS. A friendly oddity that comes and goes, sometimes correctly, sometimes
wrongly :-)
In message <17fdcce258.News@poppy-land.fslife.co.uk>
Mark J <mark@poppyland.plu$.com.invalid> wrote:
In message <rrs8uf$kmf$2@dont-email.me>
The Natural Philosopher <tnp@invalid.invalid> wrote:
On 21/12/2020 22:30, Mayayana wrote:
I've got a RPi4 with USB keyboard and mouse. It all works fine but >>>> there's a very odd thing, which took me awhile to figure out: I have to >>>> press @ to get " and I have to press " to get @.That's an international keyboard thing IIRC.
Is that a Pi thing? Linux? Faulty keyboard? International settings? >>>> I've never seen such behavior. Aside from that it seems to be fine.
I've lived with this for some time, but on a BeagleBoard running RISCOS. A >> friendly oddity that comes and goes, sometimes correctly, sometimes
wrongly :-)
What makes it come, and what makes it go? I can't understand why it would change except as a result of a deliberate action on your part.
David
Life is full of events that sporadically come and go without deliberate actions - as atm my 'phone line which has been dead for two weeks, but is able to have WAN connectivity, and for which Techies cannot see any
reason. I am a user, and don't deliberately take actions to violate things that are working peacefully.
Mark J wrote:
Life is full of events that sporadically come and go without deliberate actions - as atm my 'phone line which has been dead for two weeks, but is able to have WAN connectivity, and for which Techies cannot see any
reason. I am a user, and don't deliberately take actions to violate things that are working peacefully.
the phone line has nothing to do with the WAN, except it shares the same physical line.
Hopefully someone will find and solve the issue for you.
I spent >10y in phone provisioning - I've seen a lot - nothing can surprise me anymore :) especially since Indian companies do the development and support :P
If it's what we call an ADSL connection here in the UK then symptoms
of 'no phone' but 'internet working' are not that rare. If there's a physical break in the wires then your POTS phone will stop working but because the internet connection uses (moderately) high frequencies the
break in the wire just attenuates the signal somewhat but doesn't stop
it working completely.
Chris Green wrote:
If it's what we call an ADSL connection here in the UK then symptoms
of 'no phone' but 'internet working' are not that rare. If there's a physical break in the wires then your POTS phone will stop working but because the internet connection uses (moderately) high frequencies the break in the wire just attenuates the signal somewhat but doesn't stop
it working completely.
I think nowdays the providers use SIP over dedicated SIP network. If there
is a POTS somewhere it would be rarity. Even the middle age NCS are being decommissioned.
There's lots of POTS phones still here in the UK, at least the last
few miles is still a copper (or if you're unlucky) an aluminium pair.
Chris Green wrote:
There's lots of POTS phones still here in the UK, at least the last
few miles is still a copper (or if you're unlucky) an aluminium pair.
This is true, but the voice switches changed. I worked for a provider in Ireland and the DMS100 was decommissioned 5y ago. What stayed is the CS2K which would do the switching for your two copper or aluminum pair wire.
A friend I met in another project worked for Virgin Media in the UK, but I stepped back and I don't know what kind of switches they use there.
So basically there are no POTS (analog) lines on the switches (at least in half of Europe where I worked). I bet you have a phone with buttons and not with the old rotary dial.
The reason to decommission the POTS was the maintenance and electricity cost not to mention the size.
There's lots of POTS phones still here in the UK, at least the last
few miles is still a copper (or if you're unlucky) an aluminium pair.
Yes, but since the last mile or two is still copper the explanation I
gave for how you can have no telephone service but have an internet connection still stands. A break in the 'last mile or so' of copper
will produce those symptoms.
When I had FTTH installed here the first thing they did (after
erecting a couple of poles) was run copper to the house with a POTS
service on it, then a week or so later another crew turned up and
installed the fibre. The POTS service is active but never used. It would
make a lot more sense if the fibre termination was powered by the 50V on
the POTS line but it's powered by being plugged into the mains.
Chris Green wrote:
Yes, but since the last mile or two is still copper the explanation I
gave for how you can have no telephone service but have an internet connection still stands. A break in the 'last mile or so' of copper
will produce those symptoms.
why - this is only one cable that carries both signals - the fact internet works, means the cable is OK. Why the other does not work, is to be identified by the operator.
Ahem A Rivet's Shot wrote:
When I had FTTH installed here the first thing they did (after
erecting a couple of poles) was run copper to the house with a POTS
service on it, then a week or so later another crew turned up and
installed the fibre. The POTS service is active but never used. It would make a lot more sense if the fibre termination was powered by the 50V on the POTS line but it's powered by being plugged into the mains.
May be I am understanding something different under POTS than you guys.
Plain old telephone service, or plain ordinary telephone system, is a retronym for voice-grade telephone service employing analog signal transmission over copper loops (Wikipedia)
Notice "analog signal".
Even if you have copper the last 50m or 3km - it does not mean it is POTS on it.
Ahem A Rivet's Shot wrote:
When I had FTTH installed here the first thing they did (after
erecting a couple of poles) was run copper to the house with a POTS
service on it, then a week or so later another crew turned up and
installed the fibre. The POTS service is active but never used. It would make a lot more sense if the fibre termination was powered by the 50V on the POTS line but it's powered by being plugged into the mains.
May be I am understanding something different under POTS than you guys.
Plain old telephone service, or plain ordinary telephone system, is a retronym for voice-grade telephone service employing analog signal transmission over copper loops (Wikipedia)
Notice "analog signal".
Even if you have copper the last 50m or 3km - it does not mean it is POTS
on it.
It could be somewhere still a POTS - I never bothered to find out which operators are using what switching technology. I worked with operators in
12 EU countries with 18mil+ subscribers and last 2 (analog) DMS100 were decommissioned 5y ago. Most probably it is ISDN that you get.
Deloptes <deloptes@gmail.com> wrote:In the UK POTS phones, regardless of whether they have a dial or keys, is powered over the phone line: the clue is that there is only one cable
Ahem A Rivet's Shot wrote:
When I had FTTH installed here the first thing they did (after
erecting a couple of poles) was run copper to the house with a POTS
service on it, then a week or so later another crew turned up and
installed the fibre. The POTS service is active but never used. It
would make a lot more sense if the fibre termination was powered by
the 50V on the POTS line but it's powered by being plugged into the
mains.
May be I am understanding something different under POTS than you guys.
Plain old telephone service, or plain ordinary telephone system, is a
retronym for voice-grade telephone service employing analog signal
transmission over copper loops (Wikipedia)
Notice "analog signal".
Even if you have copper the last 50m or 3km - it does not mean it is
POTS on it.
Since the phone hanging on the end it still an analogue device requiring
50v DC to ring then the last section *is* still POTS.
`
Chris Green wrote:
the explanation I gave for how you can have no telephone servicewhy - this is only one cable that carries both signals
but have an internet connection still stands.
Deloptes <deloptes@gmail.com> wrote:
Ahem A Rivet's Shot wrote:
When I had FTTH installed here the first thing they did (after
erecting a couple of poles) was run copper to the house with a POTS
service on it, then a week or so later another crew turned up and
installed the fibre. The POTS service is active but never used. It would >>> make a lot more sense if the fibre termination was powered by the 50V on >>> the POTS line but it's powered by being plugged into the mains.
May be I am understanding something different under POTS than you guys.
Plain old telephone service, or plain ordinary telephone system, is a
retronym for voice-grade telephone service employing analog signal
transmission over copper loops (Wikipedia)
Notice "analog signal".
Even if you have copper the last 50m or 3km - it does not mean it is POTS on
it.
Since the phone hanging on the end it still an analogue device
requiring 50v DC to ring then the last section *is* still POTS.
Deloptes <deloptes@gmail.com> wrote:
Chris Green wrote:
Yes, but since the last mile or two is still copper the explanation I
gave for how you can have no telephone service but have an internet
connection still stands. A break in the 'last mile or so' of copper
will produce those symptoms.
why - this is only one cable that carries both signals - the fact internet >> works, means the cable is OK. Why the other does not work, is to be
identified by the operator.
No! That's the whole point. The POTS phone doesn't work if the cable
has a break but the signal used by the internet connection is a fairly
high frequency and the wires act as aerials and the connection will
still work. I have actually experienced this myself, the POTS phone
didn't work but we still had a (rather slow) internet connection.
Deloptes <deloptes@gmail.com> wrote:
Ahem A Rivet's Shot wrote:
When I had FTTH installed here the first thing they did (after
erecting a couple of poles) was run copper to the house with a POTS
service on it, then a week or so later another crew turned up and
installed the fibre. The POTS service is active but never used. It would >>> make a lot more sense if the fibre termination was powered by the 50V on >>> the POTS line but it's powered by being plugged into the mains.
May be I am understanding something different under POTS than you guys.
Plain old telephone service, or plain ordinary telephone system, is a
retronym for voice-grade telephone service employing analog signal
transmission over copper loops (Wikipedia)
Notice "analog signal".
Even if you have copper the last 50m or 3km - it does not mean it is POTS on
it.
Since the phone hanging on the end it still an analogue device
requiring 50v DC to ring then the last section *is* still POTS.
`
Ahem A Rivet's Shot wrote:
When I had FTTH installed here the first thing they did (after
erecting a couple of poles) was run copper to the house with a POTS
service on it, then a week or so later another crew turned up and
installed the fibre. The POTS service is active but never used. It would
make a lot more sense if the fibre termination was powered by the 50V on
the POTS line but it's powered by being plugged into the mains.
May be I am understanding something different under POTS than you guys.
Plain old telephone service, or plain ordinary telephone system, is a retronym for voice-grade telephone service employing analog signal transmission over copper loops (Wikipedia)
Notice "analog signal".
Even if you have copper the last 50m or 3km - it does not mean it is POTS on it.
It could be somewhere still a POTS - I never bothered to find out which operators are using what switching technology. I worked with operators in
12 EU countries with 18mil+ subscribers and last 2 (analog) DMS100 were decommissioned 5y ago. Most probably it is ISDN that you get.
Nope mine is POTS, I plugged an old analogue phone into it when it
was put in just to test it. How far that POTS goes is another matter about which I know nothing - after all I've a box where POTS signals go a few centimetres on a PCB before becoming SIP.
The reason I could not just keep the old router was that there no longer
is a phone connection in Germany. It's all voice over IP, i.e. a trumped
up skype with all the drawbacks that entails. So I needed a router new
enough to support that.
On 2020-12-23, Chris Green <cl@isbd.net> wrote:That depends on which country you are.
Deloptes <deloptes@gmail.com> wrote:
Ahem A Rivet's Shot wrote:
When I had FTTH installed here the first thing they did (after
erecting a couple of poles) was run copper to the house with a POTS
service on it, then a week or so later another crew turned up and
installed the fibre. The POTS service is active but never used. It would >>>> make a lot more sense if the fibre termination was powered by the 50V on >>>> the POTS line but it's powered by being plugged into the mains.
May be I am understanding something different under POTS than you guys.
Plain old telephone service, or plain ordinary telephone system, is a
retronym for voice-grade telephone service employing analog signal
transmission over copper loops (Wikipedia)
Notice "analog signal".
Even if you have copper the last 50m or 3km - it does not mean it is POTS on
it.
Since the phone hanging on the end it still an analogue device
requiring 50v DC to ring then the last section *is* still POTS.
Yes, but that power is now coming from a wall wart, backed up by a battery.
On 2020-12-23, Chris Green <cl@isbd.net> wrote:
Since the phone hanging on the end it still an analogue device
requiring 50v DC to ring then the last section *is* still POTS.
Yes, but that power is now coming from a wall wart, backed up by a
The Natural Philosopher <tnp@invalid.invalid> wrote:
On 24/12/2020 00:38, Axel Berger wrote:I believe quite a lot of 'base' phone provision in Germany until a few
The reason I could not just keep the old router was that there no longer >>> is a phone connection in Germany. It's all voice over IP, i.e. a trumped >>> up skype with all the drawbacks that entails. So I needed a router new
enough to support that.
Crikey. Germany was always way behind the UK.
So are they simply not delivering an analogue service? Nor suppyling a
POTS breakout box ?
years ago was actually ISDN rather than analogue POTS.
On 24/12/2020 00:38, Axel Berger wrote:
The reason I could not just keep the old router was that there no longer
is a phone connection in Germany. It's all voice over IP, i.e. a trumped
up skype with all the drawbacks that entails. So I needed a router new enough to support that.
Crikey. Germany was always way behind the UK.
So are they simply not delivering an analogue service? Nor suppyling a
POTS breakout box ?
So are they simply not delivering an analogue service? Nor suppyling a
POTS breakout box ?
Well not necessarily. VOIP can turn a digital channel into exactly what
a POTS phone expects.
I have fibre to the premises AND it sill has a POTS analogue phone
service in the copper pair that runs with the fibre....
No premises in the UK that runs on *ADSL* does NOT have a POTS service
on the same wires.
They are due to all be phased out, it is true, but not just yet.
How can you tell? Line crackle. VOIP does not *crackle*
The Natural Philosopher wrote:
I have fibre to the premises AND it sill has a POTS analogue phone
service in the copper pair that runs with the fibre....
No premises in the UK that runs on *ADSL* does NOT have a POTS service
on the same wires.
They are due to all be phased out, it is true, but not just yet.
How can you tell? Line crackle. VOIP does not *crackle*
I must agree with the frequency and broken wire as it makes sense if some connector or wireing is loose or damaged.
Regarding the VOIP and TDM - it is also true. TDM replaced the analog switches by keeping the analog signal to the customer. Then came NCS.
What I meant was TDM was decommissioned and even NCS being decommissioned in favor of SIP.
Regarding power outages - don't know about Germany and UK, but Austria and Switzerland have huge fines if the operators fail to provide emergency call services.Well that is true for UK POTS services. I once saw the exchange in
So there are backup batteries for the switches and the lines. It is
trivial - the batteries take over until the diesel power generator turns
on.
The DMS100 had the batteries the size of a wall 50*4m. Compared to 4 Racks for a SIP switches with double capacity of subscribers.
They say there is battery buffered emergency supply for cellphones but I
do wonder how much that promise is worth when the chips come down.
On 23/12/2020 22:57, Deloptes wrote:
Ahem A Rivet's Shot wrote:I have fibre to the premises AND it sill has a POTS analogue phone
When I had FTTH installed here the first thing they did (after
erecting a couple of poles) was run copper to the house with a POTS
service on it, then a week or so later another crew turned up and
installed the fibre. The POTS service is active but never used. It would >>> make a lot more sense if the fibre termination was powered by the 50V on >>> the POTS line but it's powered by being plugged into the mains.
May be I am understanding something different under POTS than you guys.
Plain old telephone service, or plain ordinary telephone system, is a
retronym for voice-grade telephone service employing analog signal
transmission over copper loops (Wikipedia)
Notice "analog signal".
Even if you have copper the last 50m or 3km - it does not mean it is POTS on
it.
It could be somewhere still a POTS - I never bothered to find out which
operators are using what switching technology. I worked with operators in
12 EU countries with 18mil+ subscribers and last 2 (analog) DMS100 were
decommissioned 5y ago. Most probably it is ISDN that you get.
service in the copper pair that runs with the fibre....
No premises in the UK that runs on *ADSL* does NOT have a POTS service
on the same wires.
They are due to all be phased out, it is true, but not just yet.
How can you tell? Line crackle. VOIP does not *crackle*
No! That's the whole point. The POTS phone doesn't work if the cable
has a break but the signal used by the internet connection is a fairly
high frequency and the wires act as aerials and the connection will
still work. I have actually experienced this myself, the POTS phone
didn't work but we still had a (rather slow) internet connection.
In article <eovcbh-kht61.ln1@esprimo.zbmc.eu>,
Chris Green <cl@isbd.net> wrote:
No! That's the whole point. The POTS phone doesn't work if the cable
has a break but the signal used by the internet connection is a fairly
high frequency and the wires act as aerials and the connection will
still work. I have actually experienced this myself, the POTS phone
didn't work but we still had a (rather slow) internet connection.
Never mind a *break*, while in the process of repairing a fault on my
line, I was left ovenright with my actual exchange line coming to the
top of the pole and connected to "pair A" in my overhead cable to the building, but my phone/router/house wiring going up the wall and
connected to "pair B" in the overhead cable instead.
This was because the job of swapping pairs had been done at the house
end (ladder access) but needed a lift platform to complete at the pole
(elf and safety).
Overhead
Me: <-----o============ (nothing)
(nothing) ============o---> BT:
Phone line -- dead. 0v. Obviously.
ADSL, disconnected on BOTH wires, working at very low speed.
The engineer didn't believe it possible that the modem was syncing *at
all* "because you are not connected" ...
It battled on, despite this, from the leakage/capacitive coupling
between pairs in 30 feet of overhead cable.
Ahem A Rivet's Shot wrote to Chris Green <=-
When I had FTTH installed here the first thing they did (after
erecting a couple of poles) was run copper to the house with a POTS service on it, then a week or so later another crew turned up and installed the fibre.
Deloptes wrote to Ahem A Rivet's Shot <=-
When I had FTTH installed here the first thing they did (after
erecting a couple of poles) was run copper to the house with a POTS
service on it, then a week or so later another crew turned up and
installed the fibre. The POTS service is active but never used. It would make a lot more sense if the fibre termination was powered by the 50V on
the POTS line but it's powered by being plugged into the mains.
May be I am understanding something different under POTS than you guys.
Plain old telephone service, or plain ordinary telephone system, is a retronym for voice-grade telephone service employing analog signal transmission over copper loops (Wikipedia)
Axel Berger wrote to Deloptes <=-
Phones used to work in emergencies. There was a direct wire to the exchange and that was battery buffered. Today an electrity blackout
means no phone, no emrgency calls for an ambulance and no fire service
in case one of the many candles used topples over. You're cutr off like rural places in the 19th century but unlike them totally inable to cope
on your own.
--
/-\ No | Dipl.-Ing. F. Axel Berger Tel: +49/ 221/ 7771 8067
\ / HTML | Roald-Amundsen-Strae 2a Fax: +49/ 221/ 7771 8069
X in | D-50829 Kln-Ossendorf http://berger-odenthal.de
/ \ Mail | -- No unannounced, large, binary attachments, please! --
--- SoupGate-Win32 v1.05
* Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
The Natural Philosopher wrote to Deloptes <=-
They are due to all be phased out, it is true, but not just yet.
How can you tell? Line crackle. VOIP does not *crackle*
Chris Green wrote to The Natural Philosopher <=-
I believe quite a lot of 'base' phone provision in Germany until a few years ago was actually ISDN rather than analogue POTS.
Martin Gregorie wrote to Axel Berger <=-
They say there is battery buffered emergency supply for cellphones but I
do wonder how much that promise is worth when the chips come down.
Judging by American experience over the last year or two, i.e. east
coast hurricanes, if current German practise is copying US Telcos that promise is utterly worthless.
offers an internet/telco modem that
provides dial tone. There's a spot in the modem to install a small
battery backup,
Deloptes wrote to Ahem A Rivet's Shot <=-
When I had FTTH installed here the first thing they did (after
erecting a couple of poles) was run copper to the house with a POTS service on it, then a week or so later another crew turned up and installed the fibre. The POTS service is active but never used. It
would make a lot more sense if the fibre termination was powered by
the 50V on the POTS line but it's powered by being plugged into the
mains.
May be I am understanding something different under POTS than you
guys.
Plain old telephone service, or plain ordinary telephone system, is a retronym for voice-grade telephone service employing analog signal transmission over copper loops (Wikipedia)
There's a 48vDC current running across the copper pair in a POTS
line. It's called talk battery or loop current. I think the original
poster was talking about powering the fiber terminator over it.
Ahem A Rivet's Shot wrote to Chris Green <=-
When I had FTTH installed here the first thing they did
(after erecting a couple of poles) was run copper to the house with
a POTS service on it, then a week or so later another crew turned
up and installed the fibre.
I assume the dial tone showed up as a charge? Back when DSL started
ADSL is effectively radio so if the pairs are close enough then it may
indeed work (as you experienced)
On Thu, 24 Dec 2020 08:10:00 +1300 nospam.Kurt.Weiske@f1.n770.z16210.fidonet.org (Kurt Weiske) wrote:
Deloptes wrote to Ahem A Rivet's Shot <=-
> When I had FTTH installed here the first thing they did (after
> erecting a couple of poles) was run copper to the house with a POTS
> service on it, then a week or so later another crew turned up and
> installed the fibre. The POTS service is active but never used. It
> would make a lot more sense if the fibre termination was powered by
> the 50V on the POTS line but it's powered by being plugged into the
> mains.
De> May be I am understanding something different under POTS than you
De> guys.
De> Plain old telephone service, or plain ordinary telephone system, is a >> De> retronym for voice-grade telephone service employing analog signal
De> transmission over copper loops (Wikipedia)
There's a 48vDC current running across the copper pair in a POTS
line. It's called talk battery or loop current. I think the original
poster was talking about powering the fiber terminator over it.
I was suggesting that since they insisted on running both (I only wanted the fibre) it would make sense to power the fibre terminator from
the loop current and give the fibre the same kind of reliability that the copper has.
alister wrote:
ADSL is effectively radio so if the pairs are close enough then it may
indeed work (as you experienced)
Makes you marvel at how it survives crosstalk from neighbouring lines ...
Kurt Weiske wrote:
offers an internet/telco modem that
provides dial tone. There's a spot in the modem to install a small
battery backup,
I'm afraid that's probably useless. Anyway UPS' exist and it would be
easy to proviode the same externally in your home. Your backup may
provide a nice flawless dial tone, but in a power outage it's the
external line I expect to be down. You no longer have the direct uninterrupted wire to the phone exchange with its emergency power but
rather many active amplifier boxes in between.
I know very little about these things but the above is the gist of what
I believe to have picked up. I may well be wrong.
On 24/12/2020 19:34, Ahem A Rivet's Shot wrote:
I was suggesting that since they insisted on running both (I
only wanted the fibre) it would make sense to power the fibre
terminator from the loop current and give the fibre the same kind of reliability that the copper has.
Far too sensible to ever be adopted...
That is why it never caught on in the UKChris Green wrote to The Natural Philosopher <=-
CG> I believe quite a lot of 'base' phone provision in Germany until a few
CG> years ago was actually ISDN rather than analogue POTS.
I loved ISDN back in the day. I ran a BBS off of one B channel,
hunted to the other B channel on a busy, used the second channel to
connect to the internet to download packets, or nailed both channels
up to a Shiva LAN Rover at work to browse the web and work from home.
If only the US pricing weren't prohibitive. Analog residential phone
service is/was flat rate, but ISDN was measured rate all day. It
might have dropped at night, I don't recall.
On Thu, 24 Dec 2020 08:10:00 +1300 >nospam.Kurt.Weiske@f1.n770.z16210.fidonet.org (Kurt Weiske) wrote:
There's a 48vDC current running across the copper pair in a POTS
line. It's called talk battery or loop current. I think the original
poster was talking about powering the fiber terminator over it.
I was suggesting that since they insisted on running both (I only
wanted the fibre) it would make sense to power the fibre terminator from
the loop current and give the fibre the same kind of reliability that the >copper has.
In message <20201224193433.6359e8e78fe246b7f1a6a69a@eircom.net>
Ahem A Rivet's Shot <steveo@eircom.net> wrote:
On Thu, 24 Dec 2020 08:10:00 +1300
nospam.Kurt.Weiske@f1.n770.z16210.fidonet.org (Kurt Weiske) wrote:
There's a 48vDC current running across the copper pair in a POTS
line. It's called talk battery or loop current. I think the original
poster was talking about powering the fiber terminator over it.
I was suggesting that since they insisted on running both (I only
wanted the fibre) it would make sense to power the fibre terminator from
the loop current and give the fibre the same kind of reliability that the
copper has.
No chance. A POTS phone on hook (which most are, most of the time)
consumes no power. A fibre terminator uses more power than even an
off-hook POTS phone. The entire exchange's power supply and backup
battery would need to be drastically redimensioned. And the company
would charge you for the power you consumed, plus the huge capital
cost.
David
Axel Berger wrote to Kurt Weiske <=-
Kurt Weiske wrote:
offers an internet/telco modem that
provides dial tone. There's a spot in the modem to install a small
battery backup,
I know very little about these things but the above is the gist of what
I believe to have picked up. I may well be wrong.
Phones used to work in emergencies. There was a direct wire to the
exchange and that was battery buffered. Today an electrity blackout
means no phone, no emrgency calls for an ambulance and no fire service
in case one of the many candles used topples over. You're cutr off like
rural places in the 19th century but unlike them totally inable to cope
on your own.
I have had SIP, cable only, for over a decade. It needs to be powered.
It really isn't a problem. We have mobile phones, the argument about
needing a powered phone for emergency services doesn't carry much weight
any more.
Also, a break in the IP connection to the internet backbone, routing, is
far more common than an electrical blackout. For me at least 10 times as common in the last decade.
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