The dropping of internet is done on purpose to preserve the battery for
the pots when ac power is lost. This is an actual setting in just about
all manufacturers of ftth equipment. You'll probably have a hard time
to get them to change the profile on the equipment tho but it is
possible.
Carlos Alcantar
Race Telecommunications, Inc.
101 Haskins Way
South San Francisco, CA 94080
P: 650.649.3550
F: 650.649.3551
Hi Carlos,
I realize why it's done. I merely point out that there are common
configurations in which the having the FTTH NID power the POTS
circuitry and drop the Internet circuitry is exactly the opposite of
correct. Where instead of preserving access to emergency responders,
it is intentionally designed to cut that access.
Regards,
Bill Herrin
I agree, while the majority of government and service providers have
the opinion that POTS is a lifeline service, and ethernet is not, I
disagree. I know the service provider I work for is starting to change
their views on this, but it will take time for the general populous of
managers, etc throughout the nation to realize this.
William Herrin wrote:
One thing that I think service providers take into account is that while
many people still have phones that do not have their own power source,
battery backups for home computers aren't that common as a general rule.
There is no need to have battery backup for internet services if the
computer doesn't have power.
:Luke
One thing that I think service providers take into account is that while
many people still have phones that do not have their own power source,
battery backups for home computers aren't that common as a general rule.
There is no need to have battery backup for internet services if the
computer doesn't have power.
Most people I know use laptops as their primary computers. These most definitely have battery backup.
Regards
Marshall
You would suggest treating the Ethernet and POTS ports the same for
power backup purposes until the ethernet port drops its carrier for 60
seconds or so? Maybe do the same for the POTs ports wrt detecting
whether any phones are attached? Nah, that would make far too much
sense; there must be something fatally wrong with the idea.
Regards,
Bill Herrin
William Herrin wrote:
You would suggest treating the Ethernet and POTS ports the same for
power backup purposes until the ethernet port drops its carrier for 60
seconds or so? Maybe do the same for the POTs ports wrt detecting
whether any phones are attached? Nah, that would make far too much
sense; there must be something fatally wrong with the idea.
Detecting whether an idle phone is attached to a POTS port isn't exactly trivial. This is more true now with modern phones that don't have mechanical ringers.
Keeping the ethernet port up on battery if there is link makes sense. For that matter a "Wake-on-LAN" style polling to power it for a second every 30 to detect carrier would be even better.
Walter Keen wrote:
I agree, while the majority of government and service providers have
the opinion that POTS is a lifeline service, and ethernet is not, I
disagree. I know the service provider I work for is starting to change
their views on this, but it will take time for the general populous of
managers, etc throughout the nation to realize this.
Since no one is mentioning it, the batteries often can only power POTS for 8 hours. If ethernet is left on, it drastically drops the runtime. This is not acceptable, yet I haven't seen a good setup that can provide 8+ hours for both.
Of course, it's been a non-issue for me. We run weeks without power just fine with FTTC.
Jack
If all of the POTS attached phones on the "emergency" circuit are on-hook
and there are no incoming calls, then not much power should be required. If
a phone goes off-hook it should be much easier to detect. If the network
facing side is up it can power up the POTS circuit when an incoming call is
detected. Carrier detection for ethernet port power sounds reasonable.
For the best of both world, maybe someone needs to build a "black wall
phone" that is also the NID and integrates rechargeable D-cells (so
flashlight batteries can always be swapped in if the rechargeables are
dead). The box would then, of course, know whether it was on or off-hook
and could even have a nice display for fiber-carrier status etc...