Basic questions on home networking

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sbiddle

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#636326 5-Jun-2012 20:37

PeterBC: Of course passive POE isn't possible with Gigabit either.

It is actually.

cyril7

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#636330 5-Jun-2012 20:39

Passive, no, active, yes, but its all a non event, it works just buy the right bits.

Actually Steve you are right, you can make passive gigE POE work, just takes the right bits, same bits we have been using for years to phantom power capacitive mics.

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PeterBC

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#636676 6-Jun-2012 14:00

Using a BT/RJ45 combo on your wall outlets is just flat out retarded to be frank.

So the people who design gas delivery systems for operating theatres must also be retarded when they design the sockets for oxygen and anasthetic gases so that they are absolutely incompatible? A few people got killed before the authorities decided that "standard" fittings weren't the best idea.

Consider this. An elderly person plugs in a new present into the "suitable" receptacle. It doesn't work, so they decide to leave everything until the nice grandchild can come and show them how to make it work. Now they are no longer protected by their medical alert system and consequently may not see the grandchild again. This may be an uncommon occurrence but it is possible right now and is at least as risky as going to VOIP without an adequate UPS, a matter that is causing grave concern to the authorities right now.

It means joe bloggs can come to a site and know that behind that square plug on the wall is one cable with 4-pairs and it goes to the corresponding outlet on the patch panel. It means you can plug a plethora of devices in and know that they will work.

But of course they can't. If that particular 8P8C is wired for phone it will not only not work if a data device is plugged in, the entire phone system is borked until it is pulled out.

Like Cyril says RJ45 is an international standard for structured cabling.

It may be. But the world is using RJ11.

[url] https://en.wikipedia.org/w/index.php?title=Telephone_plug&oldid=494560508#cite_note-20 [url/]

Considering that Germany and Italy use 8P8C only for ISDN, that leaves only France, NZ, South Africa and Norway misusing this jack like we are. France is known for weird and the remainder are micro-countries. Maybe the rest of the world is right? I am sure that they are.

I know that small societies like ours can make mistakes that are not picked up because of the lack of a large enough community of experts in the field. I think that this is one of them. It's on a par with our late unlamented give-way-to-the-right traffic laws. Let's hope that we don't take 30 years to admit that we have been killing people, as was the case of the traffic laws.

richms

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#636684 6-Jun-2012 14:12

Medical other alarms should be connected to the alarm jack on the phone patchpanel to allow for bypassing any offhook telephones. Otherwise they are just as useless when a phone is offhook.

Otherwise they can get with the times and move to IP connection or a 3g connection.

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webwat

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#636713 6-Jun-2012 15:00

richms: Medical other alarms should be connected to the alarm jack on the phone patchpanel to allow for bypassing any offhook telephones. Otherwise they are just as useless when a phone is offhook.

Otherwise they can get with the times and move to IP connection or a 3g connection.

Yes, although that has to be done by someone who St Johns seem to have no interest in learning about. Theres plenty of disconnected BT outlets around too so why would you give granny an alarm without checking what its plugged into?

RJ11 was never a "world" standard, just a pretty common plug, but AS/NZS ISO/IEC 15018 is pretty much the standard that TCF recommendations were based on. BT phone outlets with daisychain wiring are obsolete and inflexible; future grannies will more likely need to plug in VoIP handsets and alarms as internet becomes more ubiquitous so maybe best to prepare for that future with any wiring expected to be in place for more than 10 years.

Time to find a new industry!

sbiddle

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#636768 6-Jun-2012 16:20

PeterBC: This may be an uncommon occurrence but it is possible right now and is at least as risky as going to VOIP without an adequate UPS, a matter that is causing grave concern to the authorities right now.

UPS's aren't a grave concern right now. If they were somebody would be making them mandatory with every UFB install.

As for your view of wiring standards, I too think you're the one stuck in the backwards non standard world.

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cyril7

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#636769 6-Jun-2012 16:25

As for your view of wiring standards, I too think you're the one stuck in the backwards non standard world.

As someone who sits on a couple of national and oceanic committees on cabling standards and over sees the design and installation of several $m of ICT cable installations for a significant government contract I would agree.

Cyril

richms

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#636779 6-Jun-2012 16:36

Also multihandset dect has removed all need for jacks everywhere.

Richard rich.ms

PeterBC

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#636883 6-Jun-2012 19:09

Ah well. Thank you all for your help anyway.

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