[dba-Tech] modem/router

Jon Tydda jon.tydda at alcontrol.com
Tue Apr 15 09:43:31 CDT 2008


We only have single phase cabling in homes in the UK. Some businesses
have up to three phases with different amp ratings on the fuses. Homes
tend to be limited to 13 amps (I think, I'm NOT an electrician!),
whereas I know at work we have three phases of 415 amps. I was told by
the electrician installing a second phase in my server room not to mix
the phases across equipment though, as, much like in Ghostbusters, you
shouldn't cross the streams. It would be bad. He said something about
the "potential" and the risk of BIG shocks from bridging two phases, so
this worries me slightly. Not being an expert and all :-)


Jon

-----Original Message-----
From: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Helmut
Kotsch
Sent: 15 April 2008 15:40
To: Discussion of Hardware and Software issues
Subject: Re: [dba-Tech] modem/router


We have normally three-phase AC current in our houses. The "wiring"
networks will work best if they are all connected to the same phase.
They also work across phases since somewhere in your house the three
phases end up in a single cable where some coupling takes place. However
the performance goes down. To overcome this problem there are devices
available called "phase-couplers" which couple the high frequency data
to the other phases. One additional thing to consider is that the
network plug should be plugged directly into the wall plug without using
any extension cord because the extension cords using twisted flexible
wires are not good in transporting high frequencies. You loose signal
strength.

Helmut

-----Ursprungliche Nachricht-----
Von: dba-tech-bounces at databaseadvisors.com
[mailto:dba-tech-bounces at databaseadvisors.com]Im Auftrag von jwcolby
Gesendet: Dienstag, 15. April 2008 15:54
An: Discussion of Hardware and Software issues
Betreff: Re: [dba-Tech] modem/router


There is an additional issue here which is that electrical power systems
can come off of opposite sides of the 240 volt lines.  These "wiring"
networks work just fine for all sockets on the "same side" of the
circuit but completely fail for all sockets on the "opposite side" of
the circuit.

IOW the voltage brought into your house has TWO 120 volt "sides".  In my
case one half (roughly) of my house runs on one side, the other 1/2 runs
on the other side.  I assume that is to "balance" the load on the lines
coming in though it may simply be chance.  Not sure but I know that this
house will not support a "wiring" network, or more literally, you will
get signal to 1/2 of the house.  I have heard that there is a widget
that can be placed across the two "sides" to cause the signal to route
over to the other side.

Perry L Harold wrote:
> Rocky
>
> The success of this wireless may depend on the wiring.  I tried it 
> with Homeplug from Gigafast and never was able to make any successful 
> connections.  That was one of the first efforts at the technology and 
> my house is 40+ years old with equivalent wiring.  Maybe the devices 
> are more advanced now and the chances of success are increased.
>
> When I switched to regular wireless it installed with no problems.
>
>
> Perry Harold
> Professional Testing Inc
>
>
> -----Original Message-----
> From: dba-tech-bounces at databaseadvisors.com
> [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Rocky 
> Smolin at Beach Access Software
> Sent: Monday, April 14, 2008 8:00 PM
> To: 'Discussion of Hardware and Software issues'
> Subject: Re: [dba-Tech] modem/router
>
> Susan:
>
> I had all kinds of problems with wireless in the house.  Replaced it 
> with
> these:
>
> http://www.amazon.com/NETGEAR-XE102-Wall-Plugged-Ethernet-Bridge/dp/B0
> 00
> 2IHP
> 58
>
> Foolproof.  Just plug and play.  No software.  No configuring.  
> Perfect
> - like a hardwired connection.
>
> Rocky
>
>
>
>
> -----Original Message-----
> From: dba-tech-bounces at databaseadvisors.com
> [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Susan 
> Harkins
> Sent: Monday, April 14, 2008 3:49 PM
> To: Discussion of Hardware and Software issues
> Subject: Re: [dba-Tech] modem/router
>
> :)
>
> I admit, I was confused! :) Did I use the wrong term?
>
> Susan H.
>
>
>> OK - TOTALLY disregard the response I just sent. I totally 
>> misunderstood what you were asking for!
>>
>> John B.
>>
>> -----Original Message-----
>> From: dba-tech-bounces at databaseadvisors.com
>> [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Susan 
>> Harkins
>> Sent: Monday, April 14, 2008 5:36 PM
>> To: Discussion of Hardware and Software issues
>> Subject: Re: [dba-Tech] modem/router
>>
>> It's cable internet and I think we need the modem, but maybe we 
>> don't?
>
>> We're
>> just trying to hook up other computers.
>>
>> We had a wireless setup several years ago that worked really well, 
>> but
>
>> i don't remember if the modem was "special" or what -- I don't 
>> remember anything about the hardware.
>>
>> Also, how does wireless handle stories? This house has two floors.
>>
>> Susan H.
>>
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--
John W. Colby
www.ColbyConsulting.com _______________________________________________
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