Digest for sci.electronics.repair@googlegroups.com - 10 updates in 4 topics

OGI <OGI@NOWHERE.COM>: Oct 03 09:52AM -0700

Looking at getting Spectrum cable but having spec difficulty.
 
They will provide a router only, router with wifi or router with wifi
and phone but cannot give me specs.
 
What's my problem ?
I currently have AT&T WiFi Router that does not have much power out and
seems to drop WiFI or internet or ??? often. My security cams turn off
and the app shuts down. Bad app too !
 
If I use WiFi Analytics WiFi app on my laptop it shows the AT&T WiFI at
"Max Rate" 150 where another LAN WIFi router at the other end of the
house shows as "Max Rate" 300. I cannot watch movies from the back
room PC where the AT&T WiFi is to the living room PC using their wifi
since it stops and stutters. Using a cable down the hall works perfectly.
 
Several questions.
What feature should I be looking for in a WiFi router:
Speed 300 vs 150 "Max Rate"
Power output
Dual freq 2.9 vs 5 GHz
AC protocol or whatever it is called
 
Spectrum says it installs an Arris TG1672G but it does not specify
output power in the specs I found. Anyone have a better spec source ?
I am not even sure that is the WiFi modem router that I will get as it
seems they grab whatever is handy to bring out to install.
 
So I hate to think I would have to set up my own WiFi Router.
 
Last question -
If I get internet only and want phone service, what are my choices ?
And would that service be able to take my current land line phone
number and use it ? I would totally drop AT&T if so.
Does that service have caller ID - mandatory feature for me to have.
 
Also is there a preferred Channel ? 1 or 6 or 11 or ???
 
--- news://freenews.netfront.net/ - complaints: news@netfront.net ---
Wolf K <wolfmac@sympatico.ca>: Oct 03 03:01PM -0400

On 2016-10-03 12:52, OGI wrote:
> Looking at getting Spectrum cable but having spec difficulty.
 
[snip]
 
IMO the best configuration is a separate wifi router connected to the
modem. The modem will govern the internet connection, the wi-fi router
will govern everything else, so streaming content from a computer to a
TV (for example) will be as fast as the router can handle it. But
streaming from the internet (eg, Netflix) is governed by the modem's speed.
 
Keep in mind that if two or more devices are on the router at the same
time, neither will see the maximum rate. If you want the fastest
streaming between devices, use Ethernet cable. Some mfrs offer
super-routers with very high throughputs, but I have no idea how well
they handle multiple sources/destinations.
 
HTH
 
--
Best,
Wolf K
kirkwood40.blogspot.ca
Paul <nospam@needed.invalid>: Oct 03 03:29PM -0400

OGI wrote:
> number and use it ? I would totally drop AT&T if so.
> Does that service have caller ID - mandatory feature for me to have.
 
> Also is there a preferred Channel ? 1 or 6 or 11 or ???
 
The channel number that is least-used, is preferred :-)
You would do a survey, if attempting to play that game,
and see what channels are occupied.
 
The Arris works on 2.4GHz and 5GHz. Each has channels in it.
 
http://www.arris.com/globalassets/resources/data-sheets/tg1672g_pf_30sep13.pdf
 
3x3 Integrated Dual Band Concurrent
2.4GHz and 5GHz 802.11n radios with
Beam Forming
 
The Arris doesn't have band steering. There is a
red X next to the feature in the table here.
 
http://www.dslreports.com/hardware/ARRIS-TG1682-h4006
 
A demo without a lot of benchmarks...
A Wifi with band steering, puts the 5GHz capable
clients on the 5GHz band. These are silly little
firmware features, not necessarily requiring any
custom hardware to make them work.
 
http://www.smallnetbuilder.com/wireless/wireless-howto/32754-reduce-wi-fi-congestion-with-band-steering
 
*******
 
The rates are listed here. The Arris is likely to be
rows 21,22,23. Min of 156, max of 450 (ideal signal
conditions, with some mixture of clients). Would
the security cameras have three antennas ? What happens
when a non-MIMO device talks to a MIMO router ?
150 maybe ?
 
https://en.wikipedia.org/wiki/IEEE_802.11n-2009
 
21 3 64-QAM 2/3 156 173.3 324 360
22 3 64-QAM 3/4 175.5 195 364.5 405
23 3 64-QAM 5/6 195 216.7 405 450
 
And to my way of thinking, you cannot reasonably
expect to escape the clutches of the "150", unless
the client devices switch to something better. If
you had band steering, *maybe* some of the more
capable clients would end up on the 5GHz band.
And *maybe* it would use 40MHz then. It's a
Wifi Lotto after all.
 
Even if you had a modem/router with 802.11AC
in it, it might still switch down to 150 for
some of the client devices.
 
And remember that penetration power, varies with
frequency. 900MHz bores through a lot of stuff.
2.4GHz is getting a bit flaky. 5GHz is going
to be worse. And 60GHz (WiGig) is guaranteed
to work in the same room as you - with whizzy
transfer rates, but no ability to reach
the basement room.
 
https://en.wikipedia.org/wiki/Wireless_Gigabit_Alliance
 
*******
 
I'm not a big fan of "integrated" boxes like the Arris.
Can you figure out why ?
 
I need control of each aspect of my network. So
I can "design it". And for me, that means separate
boxes and a lot of wasted electricity. But, I'm getting
the features I want.
 
My VOIP ATA is a separate box. My router setup has
varied from time to time, and for a lot of years,
I used a separate router box. The modem portion
tends to stay in "bridged" mode. Which is not
available on "rental" modem/router/rocketship
boxes from the ISP. The ISP really doesn't
want you modifying the settings, because
then you'll call up and "complain" when it
no longer works. And they can't have that.
 
*******
 
Wifi:
 
1) Feature-rich.
2) Not tunable by humans.
Tends to deliver lowest-common-denominator.
3) Is an "Up-To" technology. Never ever
delivers the "max rate". Unbounded lower
rate (until the connection is so slow, it
times out).
 
*******
 
They make separate VOIP ATA boxes. There are two
ways to connect them. The easy way. The hard way.
The hard way, is for ATAs connected to subtending
wired connections, where you have to port forward
a bunch of stuff. If you install them in-line (the
easy way), they may limit download speeds. So you
have to be careful when selecting one. The boxes
also auto-update the firmware, and auto-pull-down
the config from the ISP. Using the box the ISP uses,
makes it a lot easier (the ISP puts the correct URLs
in the setup, so the box does the right thing when
plugged in).
 
Example: "GRANDSTREAM VoIP ATA" - has two RJ11 jacks
(Would need two phone accounts to use both jacks)
(VOIP accounts are available for $10/mo with
portable DN. I use my old POTS phone number
on my VOIP setup. I *hate* VOIP and think
it sucks donkey balls... The fucker has dropped
calls on me, while the modem was operating
perfectly fine. The server at the ISP is suspected.)
 
http://www.newegg.com/Product/Product.aspx?Item=9SIA3HG37Y8553
 
VOIP offers the worst of all possible worlds:
 
1) Nobody is interested in your call quality.
Try and get Tech Support to care :-(
AT&T won't "wring the line out" when you call.
POTS has a certain regulatory framework.
What does VOIP have ?
2) Services are unverified. Does the VOIP service
have "e911" ? Mine doesn't. In an emergency,
I could be talking to a dial tone, screaming
for help. There's no guarantee of anything when
an emergency arises. No guarantee they know where
you are. If I dial 911, someone will pick up,
but they might not be in my city, and they have
no idea of my physical location. If I've just
had a heart attack, and cannot speak, I'm
going to just croak waiting for help.
3) For $10 a month, you get a DN... (preserve your
Directory Number), and the rest is purely left
to your imagination. You are responsible every
once in a while, for using your cell phone or a
pay phone, to make sure the VOIP still works.
Call home, see if your voice mail box picks up
or not. What fun. I'm enjoying myself already.
4) If you drop the conventional FAX machine to 9600 baud,
it may work over your second RJ11 VOIP jack.
The 14400 baud setting is unlikely to work.
 
But I am saving money. I keep telling myself
I'm saving money dammit.
 
HTH,
Paul
John Larkin <jjlarkin@highlandtechnology.com>: Oct 03 12:43PM -0700

>Does that service have caller ID - mandatory feature for me to have.
 
>Also is there a preferred Channel ? 1 or 6 or 11 or ???
 
>--- news://freenews.netfront.net/ - complaints: news@netfront.net ---
 
We had AT&T DSL and phone service. The DSL was terrible and the phone
was expensive. We got Comcast cable and DSL, and phone service is
"free" but we had to rent the cable modem/phone box for something like
$5 a month, a fraction of the cost of AT&T landline service. We use
our own WiFi router. We kept our phone number and it works great.
 
The Comcast data speed keeps going up. It's about 130 mbits now.
 
 
--
 
John Larkin Highland Technology, Inc
picosecond timing precision measurement
 
jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
krw <krw@nowhere.com>: Oct 03 08:15PM -0400

On Mon, 03 Oct 2016 12:43:36 -0700, John Larkin
>"free" but we had to rent the cable modem/phone box for something like
>$5 a month, a fraction of the cost of AT&T landline service. We use
>our own WiFi router. We kept our phone number and it works great.
 
We had naked DSL for a few years. It was horrible. Earlier this year
AT&T allowed us access to the fiber running through our yard so went
with Uverse. It hasn't been without it's issues, either. First, they
own the router/AP, so con troll the password. The hardware has been
really flaky and they've had to replace everything at least once and
some of it several times. The Internet still drops out occasionally
for a few seconds to minutes.
 
>The Comcast data speed keeps going up. It's about 130 mbits now.
 
When it doesn't screw up, our Uverse is just OK (~60Mb). AT&T sucks.
"Andy" <N@n.com>: Oct 04 02:09AM -0400

Why would you want to pay spectrum up wards of $ 10.00 a month to rent a
cable modem from them?
In less then a years rental time and cost you could by a good modem and or
modem wireless router combination for the same or less money.
I have stopped paying them a model rental fee the day it came out.
I my self use a Motorola cable modem and love it and spectrum fully supports
it .
Because it is one of the models on its approved modems list so they cant
refuse to support it:)
 
 
--
AL'S COMPUTERS
"OGI" <OGI@NOWHERE.COM> wrote in message
news:nsu2bo$l43$1@adenine.netfront.net...
Joseph Gwinn <joegwinn@comcast.net>: Oct 04 10:28AM -0400

On Oct 4, 2016, Andy wrote
> it .
> Because it is one of the models on its approved modems list so they cant
> refuse to support it:)
 
I do the same, for the same reason. I'm on COMCAST, but it's the same
story.
 
When the transition from DOCSIS 2 to DOCSIS 3 became mandatory, I decided to
buy my cable modem, for money reasons, but at least as importantly, because
what COMCAST wanted to provide got terrible reviews on technical grounds.
They also wanted to be your WiFi base station, but with a very weak WiFi
radio, and no obvious way to turn the WiFi function off. (Perhaps there is a
way, but it proved impossible to get a real user manual for that modem, and
so one must presume guilt.) I already have a wired network with a WiFi arm
that all work just fine.
 
So I worked through COMCAST's list of approved DOCSIS 3.0 cable modems, and
chose one that did only that, no VOIP phone or WiFi pretensions, specifically
ARRIS SurfBoard SB6183 for about $90, if I recall. The payback period is
about 9 months.
 
After getting everything working (and batting away various attempts to get me
to ditch the SB6183 and use the COMCAST offering), things went well for at
least a year. Then, the performance began to degrade. I didn't notice at
first, but the issue came to a head when I was unable to download a 3 GByte
file - it would struggle for six hours, and always fail. Now, I have 25
Mbit/sec service, so this should take about 15 minutes. When I measured the
speed using COMCAST's own Xfinity Speed Test, I got 411 Kbits/sec. Huh?
 
So I contacted COMCAST Support, first by internet Chat to someone who seemed
to be in India. He walked me through the usual diag steps, none of which
worked, all the while insisting that the problem was the ARRIS modem. Nope -
It's an approved modem. One observation was key: If I used the nearby
Boston, MA server, I got far higher speed than to the remote Detroit and
Chicago servers (which are near to the source of the 3 GB file). Well, that
cannot be a modem issue, and can only be a COMCAST network problem.
 
Anyway, the guy in India gave up, and escalated to Advanced Tech Support, a
woman on the telephone calling from the US somewhere. She reiterated the bit
about the ARRIS modem, and I made the points about the meaning of
"approved". Again, no test changed the speed. Modem make came back up.
Well, "approved" means that I can expect to get the 25 Mbit/s data rate
I'm paying for. Or, is COMCAST putting proprietary stuff in their
interpretation of DOCSIS 3, so that no other modem will work? At this point,
the conversation dwindled, and I said that I'd go and do all the tests that
had been suggested but couldn't be performed without dropping the chat to
India, and the conversation ended.
 
First test was to hook computer directly to cable modem, which could not be
done without rebooting (because the DHCP server was not the cable modem). All
of a sudden, speeds had jumped from less than 1 Mbit/second to around 88
Mbits/sec. Wow. Put the internal network back into the path. Still 88 Mbits.
Ran a test from my wife's laptop, via WiFi - still 88 Mbits.
 
This whole drama basically cost me the weekend. All that testing confused a
number of unrelated devices and their drivers, requiring debugging and
network scanning.
 
The 88 Mbits was during the weekend. As the week progressed, the speed did
drop. As I write, it's 15 Mbits/sec for downloads, and 6.5 Mbits for
uploads.
 
Joe Gwinn
rg80211@gmail.com: Oct 04 04:31AM -0700

I plan on using i led to replace
jurb6006@gmail.com: Oct 03 05:17PM -0700

>"Just taken a pair of dead Duracell AA cells out of a TV >remote that had been laying around a long time - no evidence >of leakage at all. "
 
That does not respond to what you responding to. He is talking about counterfeit batteries. What's more, heavy duty cells should not be used in remote controls because their power drain is so low. Operational battery life approaches shelf life.
 
>"One had a bit of corrosion on the negative contact, the >other was clean. "
 
Also proves nothing. A Kodak is a different brand and even if they were made at the same factory it could have been to different specs. And corrosion does not prove a leak at all.
 
If people are really getting leaks in those Duracells it is actually more likely that they "streamlined" their manufacturing process.
 
To know for sure you need to cut the thing apart and measure everything and then do a chemical analysis. If that fails to prove anything then you have to cut some more and look at the seams for defects. For a AA battery ?
Fred McKenzie <fmmck@aol.com>: Oct 03 01:51PM -0400

In article <b646b1a6-c1c6-49e5-ac58-2b328ccce095@googlegroups.com>,
> > Probably the input circuit. Has anyone out there
> > had this problem? If so, what was the fix?
 
> > Steve
 
Steve-
 
How much over range? Many old VTVMs had a resistor in its probe. If
you used a probe with no resistor, readings would be a bit high.
 
You might research the Simpson 360-2 to see if it happened to require a
similar probe.
 
Fred
K4DII
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