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  #1 (permalink)  
Old 11-09-2007, 03:26 PM
Mike -- Email Ignored
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Posts: n/a
Default Better at a Distance

I have a Compaq laptop acquired a few months
ago. While originally it worked well, presently
it fails to make a useful connection if it is
near the router, but works better at a distance
of perhaps 40 feet, in another room. Since I
have two wireless routers, I think that we can
rule them out. (For tests, I always have the
wireless turned on in only one router.)

What are possible causes of this problem?

Thanks for your help.
Mike.


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  #2 (permalink)  
Old 11-09-2007, 03:35 PM
John Navas
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Posts: n/a
Default Re: Better at a Distance

On Fri, 09 Nov 2007 16:26:30 GMT, Mike -- Email Ignored
<m_d_berger_1900@yahoo.com> wrote in <WS%Yi.5$ET.4@trndny03>:

>I have a Compaq laptop acquired a few months
>ago. While originally it worked well, presently
>it fails to make a useful connection if it is
>near the router, but works better at a distance
>of perhaps 40 feet, in another room. Since I
>have two wireless routers, I think that we can
>rule them out. (For tests, I always have the
>wireless turned on in only one router.)
>
>What are possible causes of this problem?


Interference. See list of possible sources in the wiki below.

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

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  #3 (permalink)  
Old 11-09-2007, 04:01 PM
Mike -- Email Ignored
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Posts: n/a
Default Re: Better at a Distance

On Fri, 09 Nov 2007 16:35:00 +0000, John Navas wrote:

> On Fri, 09 Nov 2007 16:26:30 GMT, Mike -- Email Ignored
> <m_d_berger_1900@yahoo.com> wrote in <WS%Yi.5$ET.4@trndny03>:
>

[...]
>>What are possible causes of this problem?

>
> Interference. See list of possible sources in the wiki below.


The problem appeared without any change in relevant environment.

Mike.


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  #4 (permalink)  
Old 11-09-2007, 04:04 PM
John Navas
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Posts: n/a
Default Re: Better at a Distance

On Fri, 09 Nov 2007 17:01:17 GMT, Mike -- Email Ignored
<m_d_berger_1900@yahoo.com> wrote in <xn0Zi.9$NC.3@trndny07>:

>On Fri, 09 Nov 2007 16:35:00 +0000, John Navas wrote:
>
>> On Fri, 09 Nov 2007 16:26:30 GMT, Mike -- Email Ignored
>> <m_d_berger_1900@yahoo.com> wrote in <WS%Yi.5$ET.4@trndny03>:
>>

>[...]
>>>What are possible causes of this problem?

>>
>> Interference. See list of possible sources in the wiki below.

>
>The problem appeared without any change in relevant environment.


How do you know that aren't any new sources of interference?

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

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  #5 (permalink)  
Old 11-09-2007, 04:28 PM
Mike -- Email Ignored
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Default Re: Better at a Distance

On Fri, 09 Nov 2007 17:04:26 +0000, John Navas wrote:

> On Fri, 09 Nov 2007 17:01:17 GMT, Mike -- Email Ignored
> <m_d_berger_1900@yahoo.com> wrote in <xn0Zi.9$NC.3@trndny07>:
>
>>On Fri, 09 Nov 2007 16:35:00 +0000, John Navas wrote:
>>
>>> On Fri, 09 Nov 2007 16:26:30 GMT, Mike -- Email Ignored
>>> <m_d_berger_1900@yahoo.com> wrote in <WS%Yi.5$ET.4@trndny03>:
>>>

>>[...]
>>>>What are possible causes of this problem?
>>>
>>> Interference. See list of possible sources in the wiki below.

>>
>>The problem appeared without any change in relevant environment.

>
> How do you know that aren't any new sources of interference?


I haven't brought any new electronic things into my house.

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  #6 (permalink)  
Old 11-09-2007, 05:10 PM
John Navas
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Posts: n/a
Default Re: Better at a Distance

On Fri, 09 Nov 2007 17:28:09 GMT, Mike -- Email Ignored
<m_d_berger_1900@yahoo.com> wrote in <JM0Zi.5$Z01.4@trndny01>:

>On Fri, 09 Nov 2007 17:04:26 +0000, John Navas wrote:
>
>> On Fri, 09 Nov 2007 17:01:17 GMT, Mike -- Email Ignored
>> <m_d_berger_1900@yahoo.com> wrote in <xn0Zi.9$NC.3@trndny07>:
>>
>>>On Fri, 09 Nov 2007 16:35:00 +0000, John Navas wrote:
>>>
>>>> On Fri, 09 Nov 2007 16:26:30 GMT, Mike -- Email Ignored
>>>> <m_d_berger_1900@yahoo.com> wrote in <WS%Yi.5$ET.4@trndny03>:
>>>>
>>>[...]
>>>>>What are possible causes of this problem?
>>>>
>>>> Interference. See list of possible sources in the wiki below.
>>>
>>>The problem appeared without any change in relevant environment.

>>
>> How do you know that aren't any new sources of interference?

>
>I haven't brought any new electronic things into my house.


Are you sure? Really sure? Otherwise...
It could be caused by malfunction.
It could be caused by a neighbor.
It could be caused by the city.

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

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  #7 (permalink)  
Old 11-09-2007, 10:13 PM
Cal Vanize
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Posts: n/a
Default Re: Better at a Distance

John Navas wrote:
> On Fri, 09 Nov 2007 17:28:09 GMT, Mike -- Email Ignored
> <m_d_berger_1900@yahoo.com> wrote in <JM0Zi.5$Z01.4@trndny01>:
>
>> On Fri, 09 Nov 2007 17:04:26 +0000, John Navas wrote:
>>
>>> On Fri, 09 Nov 2007 17:01:17 GMT, Mike -- Email Ignored
>>> <m_d_berger_1900@yahoo.com> wrote in <xn0Zi.9$NC.3@trndny07>:
>>>
>>>> On Fri, 09 Nov 2007 16:35:00 +0000, John Navas wrote:
>>>>
>>>>> On Fri, 09 Nov 2007 16:26:30 GMT, Mike -- Email Ignored
>>>>> <m_d_berger_1900@yahoo.com> wrote in <WS%Yi.5$ET.4@trndny03>:
>>>>>
>>>> [...]
>>>>>> What are possible causes of this problem?
>>>>> Interference. See list of possible sources in the wiki below.
>>>> The problem appeared without any change in relevant environment.
>>> How do you know that aren't any new sources of interference?

>> I haven't brought any new electronic things into my house.

>
> Are you sure? Really sure? Otherwise...
> It could be caused by malfunction.
> It could be caused by a neighbor.
> It could be caused by the city.
>


Why not try checking to see if you can reduce signal strength in your
router.


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  #8 (permalink)  
Old 11-09-2007, 11:32 PM
Jeff Liebermann
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Posts: n/a
Default Re: Better at a Distance

On Fri, 09 Nov 2007 16:26:30 GMT, Mike -- Email Ignored
<m_d_berger_1900@yahoo.com> wrote:

>I have a Compaq laptop acquired a few months
>ago. While originally it worked well, presently
>it fails to make a useful connection if it is
>near the router, but works better at a distance
>of perhaps 40 feet, in another room. Since I
>have two wireless routers, I think that we can
>rule them out. (For tests, I always have the
>wireless turned on in only one router.)
>
>What are possible causes of this problem?


Interference. However, the interference is not entering at the router
end. It's getting to the Compaq laptop. (Interference can happen at
both ends of a link). If the interference is maximum if you're
standing near a window, it's almost certainly coming through the
window.

Possible sources are many but can possibly be identified if you offer
some sort of pattern. Is there all the time, or only erratically? If
erratic, at some specific time of day? How long does it last? Etc.
Your laptop may also have some way to display the signal strength and
signal quality. What you'll probably see is that the signal strength
is better when you're close, but the signal quality may get worse due
to interference.

You can also install Netstumbler on your laptop, and use the indicated
signal strength and quality to do a site survery around what I assume
is your house.
<http://www.netstumbler.com>
If Vista, use Visumbler:
<http://www.techidiots.net/project-pages/vistumbler>


--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558 jeffl@comix.santa-cruz.ca.us
# http://802.11junk.com jeffl@cruzio.com
# http://www.LearnByDestroying.com AE6KS

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  #9 (permalink)  
Old 11-10-2007, 02:45 AM
Cal Vanize
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Posts: n/a
Default Re: Better at a Distance

Jeff Liebermann wrote:
> On Fri, 09 Nov 2007 16:26:30 GMT, Mike -- Email Ignored
> <m_d_berger_1900@yahoo.com> wrote:
>
>> I have a Compaq laptop acquired a few months
>> ago. While originally it worked well, presently
>> it fails to make a useful connection if it is
>> near the router, but works better at a distance
>> of perhaps 40 feet, in another room. Since I
>> have two wireless routers, I think that we can
>> rule them out. (For tests, I always have the
>> wireless turned on in only one router.)
>>
>> What are possible causes of this problem?

>
> Interference. However, the interference is not entering at the router
> end. It's getting to the Compaq laptop. (Interference can happen at
> both ends of a link). If the interference is maximum if you're
> standing near a window, it's almost certainly coming through the
> window.
>
> Possible sources are many but can possibly be identified if you offer
> some sort of pattern. Is there all the time, or only erratically? If
> erratic, at some specific time of day? How long does it last? Etc.
> Your laptop may also have some way to display the signal strength and
> signal quality. What you'll probably see is that the signal strength
> is better when you're close, but the signal quality may get worse due
> to interference.
>
> You can also install Netstumbler on your laptop, and use the indicated
> signal strength and quality to do a site survery around what I assume
> is your house.
> <http://www.netstumbler.com>
> If Vista, use Visumbler:
> <http://www.techidiots.net/project-pages/vistumbler>
>
>


It might also be beneficial to have a look at what channels are being
used within close range of your system. It might be better to select a
channel that isn't being used and set it in your router. See how that
works. (No need to change the SSID.)


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  #10 (permalink)  
Old 11-10-2007, 03:08 AM
Jeff Liebermann
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Posts: n/a
Default Re: Better at a Distance

On Fri, 09 Nov 2007 21:45:44 -0600, Cal Vanize
<dont.even.spam.me@myspam.org> wrote:

>It might also be beneficial to have a look at what channels are being
>used within close range of your system. It might be better to select a
>channel that isn't being used and set it in your router. See how that
>works. (No need to change the SSID.)


Yep. Channels are important. However, the latest generation of
wireless access points arrive by default with a channel selection of
"auto". The idea is for the access point to automagically select an
empty channel. In theory, you don't have to set your channel or find
an empty channel.

It sorta works, but I have my doubts. For example, I'm not convinced
that it can detect networks that don't broadcast their SSID. What
I've also found at one customer with DI-624 wireless router and one
DI-624 acting as an access point, is that they both radios ended up
near one channel after about a week. I would have expected them to
end up at opposite ends of the band, but that wasn't what happened. I
have no idea what went wrong, so I just disarmed this feature and
manually set the channels.

I've also received calls from customers complaining that "it was
working just fine, but now I seem to be getting interference". At
first, I was blaming new wireless network arriving in their area. Upon
further tinkering, I found that they had automagic channel selection
enabled and it had landed on a rather bad choice of channel. When I
disarmed the feature, sniffed a bit, set the channel manually,
everything was back to normal.

While I'm ranting on the subject, I also found that it was very
difficult to get a wireless router in auto mode to change channels. I
tried every trick and source of interference I could find and never
got it to reliably switch channels. However, it would sometimes
switch without the slightest provocation. I have no idea what
algorithm is being used, or exactly how it's suppose to work. My
current guess is that it only switches when there's no traffic, making
it useless for selecting the channel with an active connection.


--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558 jeffl@comix.santa-cruz.ca.us
# http://802.11junk.com jeffl@cruzio.com
# http://www.LearnByDestroying.com AE6KS

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  #11 (permalink)  
Old 11-10-2007, 08:15 PM
Cal Vanize
Guest
 
Posts: n/a
Default Re: Better at a Distance

Jeff Liebermann wrote:
> On Fri, 09 Nov 2007 21:45:44 -0600, Cal Vanize
> <dont.even.spam.me@myspam.org> wrote:
>
>> It might also be beneficial to have a look at what channels are being
>> used within close range of your system. It might be better to select a
>> channel that isn't being used and set it in your router. See how that
>> works. (No need to change the SSID.)

>
> Yep. Channels are important. However, the latest generation of
> wireless access points arrive by default with a channel selection of
> "auto". The idea is for the access point to automagically select an
> empty channel. In theory, you don't have to set your channel or find
> an empty channel.


At boot / reset. But maybe not dynamically.


>
> It sorta works, but I have my doubts. For example, I'm not convinced
> that it can detect networks that don't broadcast their SSID. What
> I've also found at one customer with DI-624 wireless router and one
> DI-624 acting as an access point, is that they both radios ended up
> near one channel after about a week. I would have expected them to
> end up at opposite ends of the band, but that wasn't what happened. I
> have no idea what went wrong, so I just disarmed this feature and
> manually set the channels.




On both our Gateway 7001a/b/g and Cisco 1121g, the clearest channels are
selected at reboot or power cycle as default. Both settle in on what is
good, but only at boot time. Boot time might not reflect average
conditions throughout the day.

My suggestion is to try fixed channels to see which one(s) work the best
most of the time. Select that channel in the A/P. that will help overcome


>
> I've also received calls from customers complaining that "it was
> working just fine, but now I seem to be getting interference". At
> first, I was blaming new wireless network arriving in their area. Upon
> further tinkering, I found that they had automagic channel selection
> enabled and it had landed on a rather bad choice of channel. When I
> disarmed the feature, sniffed a bit, set the channel manually,
> everything was back to normal.



Yep. But beyond that, performance needs to be checked throughout the
day as well as periodically. It could very well be that at times during
the day several wireless devices (A/Ps, routers, PC, whatever) are in
use on a channel that would otherwise be OK the rest of the time.


>
> While I'm ranting on the subject, I also found that it was very
> difficult to get a wireless router in auto mode to change channels. I
> tried every trick and source of interference I could find and never
> got it to reliably switch channels. However, it would sometimes
> switch without the slightest provocation. I have no idea what
> algorithm is being used, or exactly how it's suppose to work. My
> current guess is that it only switches when there's no traffic, making
> it useless for selecting the channel with an active connection.
>
>






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  #12 (permalink)  
Old 11-11-2007, 02:32 AM
Jeff Liebermann
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Posts: n/a
Default Re: Better at a Distance

Cal Vanize <dont.even.spam.me@myspam.org> hath wroth:

>At boot / reset. But maybe not dynamically.


Nope. I tried that and found that the DI-624 always came up on the
same channel that was last used. That makes sense because you don't
want an AP reboot to reset all the existing wireless connections.
Rather, the connections should continue from where they left off.
Other AP's that I've tried are totally random on initial channel
selection, with zero consideration for existing traffic. That's how
some of my customers AP's landed on heavily used channels.

I think (not sure) that this is the applicable patent:
<http://www.google.com/patents?vid=USPAT6941143>
Note that the initial selection is random, followed by reselection at
random intervals:

"Within a radio access network (111, 112) an access point
(181, 182, 183 and 184) selects a channel by first randomly
choosing a channel from those available for use. The Access
Point then monitors the channel for a random interval to
determine if the channel is presently carrying traffic. The
Access Point will select the channel unless the channel is in use
by another AP. If so, then the AP will select another channel
and commence monitoring for a random interval in order to
determine whether the channel is available. The AP will
continue to choose channels until a suitable channel is found,
or all available channels have been exhausted."

>On both our Gateway 7001a/b/g and Cisco 1121g, the clearest channels are
>selected at reboot or power cycle as default. Both settle in on what is
>good, but only at boot time. Boot time might not reflect average
>conditions throughout the day.


How do you know it's the cleanest channel that it initially selects?
It could be random and you would not know the difference unless you
had a spectrum analyzer or channel scanner program running.

>My suggestion is to try fixed channels to see which one(s) work the best
>most of the time. Select that channel in the A/P. that will help overcome


Agreed. Fixed channels are probably better than auto. Some trial and
error will be necessary.

>Yep. But beyond that, performance needs to be checked throughout the
>day as well as periodically. It could very well be that at times during
>the day several wireless devices (A/Ps, routers, PC, whatever) are in
>use on a channel that would otherwise be OK the rest of the time.


Yeah, I've seen that. I have several customers in high rise
buildings, with glass walls, that are facing other high rise
buildings. The Wi-Fi interference is fairly bad, but the microwave
oven interference is really awful. During coffee break, lunch, and
afternoon loafing times, when the microwave ovens are doing their
thing, Wi-Fi comes to a grinding stop.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

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  #13 (permalink)  
Old 11-11-2007, 03:48 AM
Cal Vanize
Guest
 
Posts: n/a
Default Re: Better at a Distance

Jeff Liebermann wrote:
> Cal Vanize <dont.even.spam.me@myspam.org> hath wroth:
>
>> At boot / reset. But maybe not dynamically.

>
> Nope. I tried that and found that the DI-624 always came up on the
> same channel that was last used. That makes sense because you don't
> want an AP reboot to reset all the existing wireless connections.
> Rather, the connections should continue from where they left off.
> Other AP's that I've tried are totally random on initial channel
> selection, with zero consideration for existing traffic. That's how
> some of my customers AP's landed on heavily used channels.
>
> I think (not sure) that this is the applicable patent:
> <http://www.google.com/patents?vid=USPAT6941143>
> Note that the initial selection is random, followed by reselection at
> random intervals:
>
> "Within a radio access network (111, 112) an access point
> (181, 182, 183 and 184) selects a channel by first randomly
> choosing a channel from those available for use. The Access
> Point then monitors the channel for a random interval to
> determine if the channel is presently carrying traffic. The
> Access Point will select the channel unless the channel is in use
> by another AP. If so, then the AP will select another channel
> and commence monitoring for a random interval in order to
> determine whether the channel is available. The AP will
> continue to choose channels until a suitable channel is found,
> or all available channels have been exhausted."
>



HAHAHAHAHAHAHAHA!!!

A DI-624 is a home networking toy! Hardly anything on which to base any
reliable network or a kind of discussion of connection quality! I'm not
surprised you get strange and variable results.

Besides, it hardly even complies with THAT patent.

But still its better to "survey the airways" with a PC to determine
channels that aren't in use. Combine that with a good scan at boot time
and there may be channels identified to start fixed channel testing.


>> On both our Gateway 7001a/b/g and Cisco 1121g, the clearest channels are
>> selected at reboot or power cycle as default. Both settle in on what is
>> good, but only at boot time. Boot time might not reflect average
>> conditions throughout the day.

>
> How do you know it's the cleanest channel that it initially selects?
> It could be random and you would not know the difference unless you
> had a spectrum analyzer or channel scanner program running.
>


No, its not random. Both our A/Ps scan all channels (confirmed in the
boot logs) and determine / select the best. I've noted that it detects
and selects channels that have nothing else on them. Since the Gateway
is the faster boot, it finds its channels (a and b/g) and the Cisco
selects a different one. Both find and select channels with the weakest
(or none) other signals. Consistently.


>> My suggestion is to try fixed channels to see which one(s) work the best
>> most of the time. Select that channel in the A/P. that will help overcome

>
> Agreed. Fixed channels are probably better than auto. Some trial and
> error will be necessary.
>
>> Yep. But beyond that, performance needs to be checked throughout the
>> day as well as periodically. It could very well be that at times during
>> the day several wireless devices (A/Ps, routers, PC, whatever) are in
>> use on a channel that would otherwise be OK the rest of the time.

>
> Yeah, I've seen that. I have several customers in high rise
> buildings, with glass walls, that are facing other high rise
> buildings. The Wi-Fi interference is fairly bad, but the microwave
> oven interference is really awful. During coffee break, lunch, and
> afternoon loafing times, when the microwave ovens are doing their
> thing, Wi-Fi comes to a grinding stop.
>


Don't think that the little wireless telephones don't play complete
havoc with 802.11b/g wireless. That's why I've got an A/P with 802.11a
and all our PC adapters are a/b/g. In case the interference levels
knock them off of their primary b/g connection, they are on automatic
fallback to the 802.11a A/P.

But that's just what we use at home.

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  #14 (permalink)  
Old 11-11-2007, 05:20 AM
Jeff Liebermann
Guest
 
Posts: n/a
Default Re: Better at a Distance

Cal Vanize <dont.even.spam.me@myspam.org> hath wroth:

>HAHAHAHAHAHAHAHA!!!
>
>A DI-624 is a home networking toy! Hardly anything on which to base any
>reliable network or a kind of discussion of connection quality! I'm not
>surprised you get strange and variable results.


Yep. It's a toy. I'm too lazy to dig out the sales figured, but my
guess is that DLink has sold at least as many wireless routers as
Cisco AP's (if you eliminate Linksys sales). The DI-624 and similar
routers may be toys, but they're very common toys. Besides, I like my
toys.

If you read the questions that are asked in alt.internet.wireless, the
number of questions about Cisco routers are few when compared to the
large number of questions involving toy routers. It's a fair
assumption that most users in this newsgroup buy and use toy routers,
not Cisco access points.

>Besides, it hardly even complies with THAT patent.


I'll have to take your word for it as I have no way to test it right
now. If I get the chance, I'll do some more testing. Doing
experiments on the customers time is generally discouraged.

>But still its better to "survey the airways" with a PC to determine
>channels that aren't in use. Combine that with a good scan at boot time
>and there may be channels identified to start fixed channel testing.


Agreed.

What I want for Hannukah:
<http://www.saelig.com/miva/merchant.mvc?Screen=PROD&Product_Code=EMC002&Categ ory_Code=EMC>
<http://www.tti-test.com/psa/rf-spectrum-analyzer.htm>

>> How do you know it's the cleanest channel that it initially selects?
>> It could be random and you would not know the difference unless you
>> had a spectrum analyzer or channel scanner program running.


>No, its not random. Both our A/Ps scan all channels (confirmed in the
>boot logs) and determine / select the best. I've noted that it detects
>and selects channels that have nothing else on them. Since the Gateway
>is the faster boot, it finds its channels (a and b/g) and the Cisco
>selects a different one. Both find and select channels with the weakest
>(or none) other signals. Consistently.


Good enough if the log file shows how it decides. There's nothing
useful showing on the toy routers in the logs. Does the Gateway or
Cisco scan randomly for empty channels as the patent describes? I'm
fairly sure the DI-624 does NOT, which means you're probably correct
that it does not follow the patent description.

>Don't think that the little wireless telephones don't play complete
>havoc with 802.11b/g wireless. That's why I've got an A/P with 802.11a
>and all our PC adapters are a/b/g. In case the interference levels
>knock them off of their primary b/g connection, they are on automatic
>fallback to the 802.11a A/P.
>
>But that's just what we use at home.


I have a 2.4GHz Panasonic KX-FPG379 fax/phone/answering-machine
conglomeration. It's a bit smarter about dealing with wi-fi than my
previous Panasonic cordless phone. I've watched it on the spectrum
analyzer. It apparently looks for existing signals and plants itself
on the opposite end of the band. If I set my WRT54G toy router on
channel 1, the cordless phone ends up near ch11. If I set the WRT54G
for ch11, the cordless phone ends up near ch1. If the WRT54G is on
ch6, the phone seems to favor the lower channels. The previous phone
didn't do that and would appear on random channels and sit there
forever.

I should try my home WRT54G on auto, but I don't want to disrupt our
neighborhood WLAN that's running on it. I'll play with it at the
office, where I can do some real damage.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

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  #15 (permalink)  
Old 11-11-2007, 04:35 PM
Cal Vanize
Guest
 
Posts: n/a
Default Re: Better at a Distance

Jeff Liebermann wrote:
> Cal Vanize <dont.even.spam.me@myspam.org> hath wroth:
>
>> HAHAHAHAHAHAHAHA!!!
>>
>> A DI-624 is a home networking toy! Hardly anything on which to base any
>> reliable network or a kind of discussion of connection quality! I'm not
>> surprised you get strange and variable results.

>
> Yep. It's a toy. I'm too lazy to dig out the sales figured, but my
> guess is that DLink has sold at least as many wireless routers as
> Cisco AP's (if you eliminate Linksys sales). The DI-624 and similar
> routers may be toys, but they're very common toys. Besides, I like my
> toys.


But these are "toys" don't necessarily provide reliable service (and my
point in using the term "toy"). Just cheap mass-produced [insert
derogatory term here] that is compromised to a price point. And the
compromises are against reliability and stability. They might look
pretty but don't seem to hold up.

>
> If you read the questions that are asked in alt.internet.wireless, the
> number of questions about Cisco routers are few when compared to the
> large number of questions involving toy routers. It's a fair
> assumption that most users in this newsgroup buy and use toy routers,
> not Cisco access points.
>



Agreed. Consumers trying to save a few bucks are vulnerable targets for
this crap. Cheap stuff outsells quality most of the time. Cisco
routers and A/Ps don't have the problems of the cheap junk so I would
expect very few questions. I'm sure there are a lot fewer Cisco
appliances in use except in serious applications where reliability and
stability are valued.

There weren't many of the Gateway 7001s sold so I wouldn't expect to see
many, if any, questions at all. At about $400 per copy, they priced
themselves out of the market trying to compete against Cisco (with the
Cisco reputation).


I see all kinds of complaints about cheap networking appliances failing
all the time. D-Link, Linksys, other cheap consumer crap sells good and
then fails relatively quickly. In the meantime, users having problems
don't understand that the quality of this crap is really negatively
contributing to their limited service levels.

Good quality components (Cisco, most 3Com, high-end D-Link / Netgear)
typically provides reliable service and rarely fails. No resets
required, no power cycling, no "getting lost" on the LAN.


FYI, a used Cisco 831 on eBay is about the same price, maybe a little
more, than the network toys that fall apart in a few months. A Cisco
1121g recently went for under $100 inc. shipping, a 1231g for under $120
inc. shipping. These tools are robust and provide reliable
connectivity. Put these on a UPS and they just never go down.



>> Besides, it hardly even complies with THAT patent.

>
> I'll have to take your word for it as I have no way to test it right
> now. If I get the chance, I'll do some more testing. Doing
> experiments on the customers time is generally discouraged.



If you're charging for customer support, wouldn't you want to recommend
better components? In the long run, wouldn't it be cheaper?


>> But still its better to "survey the airways" with a PC to determine
>> channels that aren't in use. Combine that with a good scan at boot time
>> and there may be channels identified to start fixed channel testing.

>
> Agreed.
>
> What I want for Hannukah:
> <http://www.saelig.com/miva/merchant.mvc?Screen=PROD&Product_Code=EMC002&Categ ory_Code=EMC>
> <http://www.tti-test.com/psa/rf-spectrum-analyzer.htm>
>
>>> How do you know it's the cleanest channel that it initially selects?
>>> It could be random and you would not know the difference unless you
>>> had a spectrum analyzer or channel scanner program running.

>
>> No, its not random. Both our A/Ps scan all channels (confirmed in the
>> boot logs) and determine / select the best. I've noted that it detects
>> and selects channels that have nothing else on them. Since the Gateway
>> is the faster boot, it finds its channels (a and b/g) and the Cisco
>> selects a different one. Both find and select channels with the weakest
>> (or none) other signals. Consistently.

>
> Good enough if the log file shows how it decides. There's nothing
> useful showing on the toy routers in the logs. Does the Gateway or
> Cisco scan randomly for empty channels as the patent describes? I'm
> fairly sure the DI-624 does NOT, which means you're probably correct
> that it does not follow the patent description.



Both Cisco and Gateway appear to start at channel 1 and go through 11
for the 2.4ghz band. For the 5ghz band, the Gateway appears to start at
channel 36 and works its way to 165 sequentially.

Both the Cisco and Gateway have set-up options for single channel
selection within the bands they operate. Because of a particular
vulnerability, the Gateway needs to be set to fixed channels.



>
>> Don't think that the little wireless telephones don't play complete
>> havoc with 802.11b/g wireless. That's why I've got an A/P with 802.11a
>> and all our PC adapters are a/b/g. In case the interference levels
>> knock them off of their primary b/g connection, they are on automatic
>> fallback to the 802.11a A/P.
>>
>> But that's just what we use at home.

>
> I have a 2.4GHz Panasonic KX-FPG379 fax/phone/answering-machine
> conglomeration. It's a bit smarter about dealing with wi-fi than my
> previous Panasonic cordless phone. I've watched it on the spectrum
> analyzer. It apparently looks for existing signals and plants itself
> on the opposite end of the band. If I set my WRT54G toy router on
> channel 1, the cordless phone ends up near ch11. If I set the WRT54G
> for ch11, the cordless phone ends up near ch1. If the WRT54G is on
> ch6, the phone seems to favor the lower channels. The previous phone
> didn't do that and would appear on random channels and sit there
> forever.
>


Nice feature on the Panny. NOBODY in our neighborhood uses ch1 or ch11
because of the wireless phone issues.


> I should try my home WRT54G on auto, but I don't want to disrupt our
> neighborhood WLAN that's running on it. I'll play with it at the
> office, where I can do some real damage.


Just out of curiosity, are you running separate VLANs for your WLAN?
(Is that feature supported on a WRT54G?) And what kind of security /
access has been implemented on the "neighborhood WLAN" to limit
unauthorized access?




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  #16 (permalink)  
Old 11-13-2007, 05:33 PM
Jeff Liebermann
Guest
 
Posts: n/a
Default Re: Better at a Distance

Cal Vanize <dont.even.spam.me@myspam.org> hath wroth:

>But these are "toys" don't necessarily provide reliable service (and my
>point in using the term "toy").


How reliable would you like it? For the average home user, rebooting
the wireless router every few weeks is no big deal. After some
initial problems, router stressing protocols, such as Bitorrent, work
quite well. Granted, I've seem some really bad junk being sold as
wireless consumer grade products, but presumably one does not buy from
the very bottom of the market.

>Just cheap mass-produced [insert
>derogatory term here] that is compromised to a price point. And the
>compromises are against reliability and stability. They might look
>pretty but don't seem to hold up.


Ummm... Considering the number of power failures and glitches we get
every winter, I don't think uptime is a major issue. If I applied
commercial ISP standards to the average home computer installation,
literally every component, from the power conditioning, to the
antennas, would fail to comply. That's why there's a difference
between consumer and commercial. I have no problem with using
commercial hardware for consumer applications. However, I doubt if
Joe Sixpack is willing to pay the price.

Checking... well, my office WRT54G toy router, running DD-WRT v24, has
been up for 5 days (when I did the firmware upgrade). It's been
running for perhaps a year, with uptimes running around 4-5 weeks.
Downtime is usually inspired by me wanting to try some experiments
that require a power cycle. I think that's reliable enough.

>Agreed. Consumers trying to save a few bucks are vulnerable targets for
>this crap.


"Trying" is a bit of an understatement. Even Cisco bought a cheap
router company (Linksys) because they thought there was something good
about the product. The consumers are not only trying, they've
succeeded. There are plenty of user installed wireless systems that
work fine out of the box and do not require a CCNE to configure.

>Cheap stuff outsells quality most of the time. Cisco
>routers and A/Ps don't have the problems of the cheap junk so I would
>expect very few questions.


No, they have other problems. Joe Sixpack can't program a VCR or DVR,
can't set his digital clock, can't put the batteries into a toy, and
probably can't configure a Cisco router. That's why the wireless
industry has invented SES, AOSS and other setup aids.
<http://www.buffalotech.com/technology/our-technology/aoss/>
When the cheap wireless router biz was configuring their routers with
built in web based interfaces, I was doing battle with Cisco 25xx
series routers in IOS from the command line. It may take a while for
Cisco to discover and adopt simplicity from the cheap junk.

>I'm sure there are a lot fewer Cisco
>appliances in use except in serious applications where reliability and
>stability are valued.


Sure. I have a few Cisco wireless access points and bridges in
service. They work great. However, in the presence of interference
and path impairment issues, they don't work any better than commodity
wireless devices. Cisco's main advantage is in the weird and
wonderful protocols that most home users don't need. To Cisco's
credit, I've had no equipment field failures, while the consumer grade
stuff has experienced all manner of disgusting failures.

>There weren't many of the Gateway 7001s sold so I wouldn't expect to see
>many, if any, questions at all. At about $400 per copy, they priced
>themselves out of the market trying to compete against Cisco (with the
>Cisco reputation).


Dell also tried that with network hardware, and gave up. I didn't
mind them giving up on a bad idea. What bugged me is that they left
their "loyal" customers hanging. Gateway did much of the same thing,
but I think Acer might pickup the support. Dunno.

>I see all kinds of complaints about cheap networking appliances failing
>all the time. D-Link, Linksys, other cheap consumer crap sells good and
>then fails relatively quickly.


I don't. My guess is about less than 1% genuine hardware failure
rate. Most of these are due to power glitches, idiot errors, or
physical damage. My biggest headaches are the constant firmware
updates required to keep ahead of bugs and exploits, plus companies
that abandon their existing customers by NOT releasing firmware
updates for known bugs. However, I'm fairly careful to avoid vendors
and product that have these issues.

>In the meantime, users having problems
>don't understand that the quality of this crap is really negatively
>contributing to their limited service levels.


I think they're learning to tolerate it. Most consumer electronics is
essentially throw away. Cell phones have an 18 month average life
time. I suspect wireless routers run about 3 years before they are
replaced. DSL modems about 4 years. I don't even wanna touch the
lifetime of TV's and hi-fi. Not only does Joe Sixpack understand that
he's buying commodity junk hardware, he likes it because of the low
price.

Have you ever tried to sell Cisco hardware to a home user? I'm not
talking about buying used stuff off eBay. I mean new, out of the box,
with warranty, and possibly a service contract? I have and actually
succeeded, once. I wish I hadn't because I was expected to provide
what amounted to an SLA (service level agreement). The Cisco 826
DSL/router combo was fine, but the PBI/SBC/AT&T DSL service and phone
lines were awful and accounted for most of the service calls. I lost
money on this one.

>Good quality components (Cisco, most 3Com, high-end D-Link / Netgear)
>typically provides reliable service and rarely fails. No resets
>required, no power cycling, no "getting lost" on the LAN.


I have specific issues with some of the allegedly high end D-Link and
Netgear equipment. I've tried it and was not impressed. Most of it
is re-labeled equipment from tiny specialty manufacturers. The large
vendors stick their name on the box, offer zero support, and sell the
initial production run. Then, they drop the product because the
customers are complaining. The small company can't handle the support
load, so that creates an essentially abandoned product, even while
it's still being sold. Specifics if you really want them.

>FYI, a used Cisco 831 on eBay is about the same price, maybe a little
>more, than the network toys that fall apart in a few months. A Cisco
>1121g recently went for under $100 inc. shipping, a 1231g for under $120
>inc. shipping. These tools are robust and provide reliable
>connectivity. Put these on a UPS and they just never go down.


Yep. There's enough there that I could probably support my business
re-selling used hardware. That makes Cisco hardware price
competitive. However, the few pieces of Cisco hardware I've bought
this way have all burned far too much time. All needed firmware
updates. Some didn't work. I don't mind doing this, but it does take
the edge off the price benefit. However, Joe Sixpack would never be
able to do any of this. Are you suggesting that some of the users in
this newsgroup purchase Cisco access points on eBay and deal with
these problems? I hope not.

>If you're charging for customer support, wouldn't you want to recommend
>better components? In the long run, wouldn't it be cheaper?


I'm almost retired, so keeping the phone from ringing is slowly
becoming a priority. I want a happy customer but there's a problem. I
rarely make the initial sale. My purpose in life seems to be fix the
mess after it's totally screwed up by someone else. I do mostly
troubleshooting, damage control, rework, and repairs. With wireless,
it's almost always an installation or interference issue, not an
equipment issue. Where I do find absolute junk or defective hardware,
I'll sell a replacement.

I do better with the coffee shop installs, where I'm able to specify
my choice of cheap commodity wireless routers. In this case, you're
correct. I've been seeing problems that would best be solved with a
better grade of hardware. I proposed a solution upgrading from
Buffalo hardware to Sonicwall TZ-170w. The customer refused due to
the price tag and now declares that he's willing to live with the
problems. I don't think I would have done any better specifying
Cisco.

>Nice feature on the Panny. NOBODY in our neighborhood uses ch1 or ch11
>because of the wireless phone issues.


I'm in an office complex with about 6 businesses. 5 of them have
wireless. 4 of those are on channel 6. (I didn't set these up). All
of them are happy because the wireless is lightly used (mostly visitor
laptops and PDA's). I initially put myself on Ch1 and found that my
2.4GHz cordless phones start their scans at the bottom of the band.
So, I moved to Ch11 and lived happily ever after.

>> I should try my home WRT54G on auto, but I don't want to disrupt our
>> neighborhood WLAN that's running on it. I'll play with it at the
>> office, where I can do some real damage.


>Just out of curiosity, are you running separate VLANs for your WLAN?


No. I have "AP isolation" enabled in the WRT54GS router. That keeps
the wireless users from seeing each other. The wireless part of the
WRT54GS will not forward packets from wireless to wireless. I also
use this in coffee shop installs. I have used VLAN's to isolate
public and private wireless networks.

>(Is that feature supported on a WRT54G?)


Not with the stock firmware. DD-WRT supports VLAN's but the firmware
seems very beta. I had problems with wireless VLAN's and dual SSID's.
However, setting up a separate VLAN on an ethernet port works fine.
<http://www.informatione.gmxhome.de/DDWRT/Standard/V24BetaVPN/Vlan.html>
<http://www.geek-pages.com/articles/latest/dd-wrt_-_setting_up_a_separate/isolated_vlan_on_port_4_with_dhcp.html>

EoIP (ethernet over IP) tunneling is also supported:
<http://www.informatione.gmxhome.de/DDWRT/Standard/V24BetaVPN/eop-tunnel.html>
but I haven't had a chance to play with it. I've been told there are
bugs and that it currently only works in bridge mode.

>And what kind of security /
>access has been implemented on the "neighborhood WLAN" to limit
>unauthorized access?


Lots of trees to block the RF. It's really crude and should not be
used as an example of how to setup a neighborhood LAN. I use no
encryption and MAC filtering. I monitor access with arpwatch. Someone
could break in, but I would know about it rapidly. I've had more
problems with "wiretaps" into the CAT5, coax, and fiber running
through the forest, than with wireless. Not only does the security
suck, the traffic can be sniffed. There's considerable old 802.11b
WEP only hardware in the system that needs to be replaced. The only
reason there haven't been problems is that I know all the neighbors
within range (as limited by the forest). This would never work in my
palatial office, where WPA-PSK is mandatory because even the local
street bums have laptops and wireless PDA's.

I have a stand alone RADIUS server sitting on my bench (PC104 based)
that I'm going to eventually deploy for WPA-RADIUS with 802.1x
authentication on the neighborhood WLAN. The main consideration is
that it makes no noise and draws little power. That means no fan and
no hard disk. I'm trying to run the whole mess on a 1GB compact flash
card, but I'm out of space. I should have a 4GB card shortly, which
should be sufficient. I'm also looking at some stand alone
authentication products.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

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  #17 (permalink)  
Old 11-13-2007, 09:30 PM
Cal Vanize
Guest
 
Posts: n/a
Default Re: Better at a Distance

Jeff Liebermann wrote:
> Cal Vanize <dont.even.spam.me@myspam.org> hath wroth:
>
>> But these are "toys" don't necessarily provide reliable service (and my
>> point in using the term "toy").

>
> How reliable would you like it? For the average home user, rebooting
> the wireless router every few weeks is no big deal. After some
> initial problems, router stressing protocols, such as Bitorrent, work
> quite well. Granted, I've seem some really bad junk being sold as
> wireless consumer grade products, but presumably one does not buy from
> the very bottom of the market.


For the average home user, its a pain in the ass to reboot it. And
typically rebooting occurs more frequently with the age of the device


>
>> Just cheap mass-produced [insert
>> derogatory term here] that is compromised to a price point. And the
>> compromises are against reliability and stability. They might look
>> pretty but don't seem to hold up.

>
> Ummm... Considering the number of power failures and glitches we get
> every winter, I don't think uptime is a major issue. If I applied
> commercial ISP standards to the average home computer installation,
> literally every component, from the power conditioning, to the
> antennas, would fail to comply. That's why there's a difference
> between consumer and commercial. I have no problem with using
> commercial hardware for consumer applications. However, I doubt if
> Joe Sixpack is willing to pay the price.



How do you spell UPS?

Joe sixpack doesn't stop to think that he pays [insert $$ amount here
for broadband] and gets pissed off wen he has problems in teh middle of
an eBay auction. If he were to spend another $2 per month for a
connection that didn't fail, he might go for it. Take one year's worth
of that extra $2 and spend it on a good router and he gets what he wants.

It the responsibility of support technicians to educate those they
support to help them understand the investments they make in support
hardware.

But OTOH, it may just impact their job security and billable hours.



> Checking... well, my office WRT54G toy router, running DD-WRT v24, has
> been up for 5 days (when I did the firmware upgrade). It's been
> running for perhaps a year, with uptimes running around 4-5 weeks.
> Downtime is usually inspired by me wanting to try some experiments
> that require a power cycle. I think that's reliable enough.
>


5 days!!! WOW, that's really impressing for a Linksys!! I just looked
to see that its only bee five weeks for the power cycle of our Cisco.
That happened because we put it on a different UPS.




>> Agreed. Consumers trying to save a few bucks are vulnerable targets for
>> this crap.

>
> "Trying" is a bit of an understatement. Even Cisco bought a cheap
> router company (Linksys) because they thought there was something good
> about the product. The consumers are not only trying, they've
> succeeded. There are plenty of user installed wireless systems that
> work fine out of the box and do not require a CCNE to configure.


And work great for weeks, maybe even a few months. Even Cisco knows
that Linksys is just consumer-grade crap that won't last.

And if you check, it doesn't take much to configure a Cisco router
anymore. They have web-based tools that work just fine.

>
>> Cheap stuff outsells quality most of the time. Cisco
>> routers and A/Ps don't have the problems of the cheap junk so I would
>> expect very few questions.

>
> No, they have other problems. Joe Sixpack can't program a VCR or DVR,
> can't set his digital clock, can't put the batteries into a toy, and
> probably can't configure a Cisco router. That's why the wireless
> industry has invented SES, AOSS and other setup aids.
> <http://www.buffalotech.com/technology/our-technology/aoss/>
> When the cheap wireless router biz was configuring their routers with
> built in web based interfaces, I was doing battle with Cisco 25xx
> series routers in IOS from the command line. It may take a while for
> Cisco to discover and adopt simplicity from the cheap junk.



Cisco 2500 series? Those are a little old, doncha think? Didn't they
use those to stream live video of the sporting events at the Coliseum?
The old one in Rome. You know "and the latest score is Lions 4,
Christians nothing... And now back to the action!"

Modern Cisco routers have easier set-up. And even the 2500 series are
workable. Plenty of set-up scripts laying around.


>
>> I'm sure there are a lot fewer Cisco
>> appliances in use except in serious applications where reliability and
>> stability are valued.

>
> Sure. I have a few Cisco wireless access points and bridges in
> service. They work great. However, in the presence of interference
> and path impairment issues, they don't work any better than commodity
> wireless devices. Cisco's main advantage is in the weird and
> wonderful protocols that most home users don't need. To Cisco's
> credit, I've had no equipment field failures, while the consumer grade
> stuff has experienced all manner of disgusting failures.



The difference is that Cisco A/Ps don't need to be reset. As you note,
they are robust and last. The investment in hardware alone pays for
itself for the life of the unit (not even considering the $$ spent in
set-up time charged by support staff). They just keep going unlike the
vast majority of the toys.

The interference issues are typically not with the A/Ps, they are with
the radios in the PCs trying to communicate with the A/Ps.


>
>> There weren't many of the Gateway 7001s sold so I wouldn't expect to see
>> many, if any, questions at all. At about $400 per copy, they priced
>> themselves out of the market trying to compete against Cisco (with the
>> Cisco reputation).

>
> Dell also tried that with network hardware, and gave up. I didn't
> mind them giving up on a bad idea. What bugged me is that they left
> their "loyal" customers hanging. Gateway did much of the same thing,
> but I think Acer might pickup the support. Dunno.
>


The good news is that they don't require much support. Even the known
bug in the Gateway A/P has an easy workaround.


>> I see all kinds of complaints about cheap networking appliances failing
>> all the time. D-Link, Linksys, other cheap consumer crap sells good and
>> then fails relatively quickly.

>
> I don't. My guess is about less than 1% genuine hardware failure
> rate. Most of these are due to power glitches, idiot errors, or
> physical damage. My biggest headaches are the constant firmware
> updates required to keep ahead of bugs and exploits, plus companies
> that abandon their existing customers by NOT releasing firmware
> updates for known bugs. However, I'm fairly careful to avoid vendors
> and product that have these issues.


Its been my experience and the experience of those I know that very few
cheap routers or access points last more than a few months. I've never
had one last for more than 18 months without constant nursing. They're
OK out of the box, but develop problems as internal components start to
fail. Buggy software doesn't help.


>
>> In the meantime, users having problems
>> don't understand that the quality of this crap is really negatively
>> contributing to their limited service levels.

>
> I think they're learning to tolerate it. Most consumer electronics is
> essentially throw away. Cell phones have an 18 month average life
> time. I suspect wireless routers run about 3 years before they are
> replaced. DSL modems about 4 years. I don't even wanna touch the
> lifetime of TV's and hi-fi. Not only does Joe Sixpack understand that
> he's buying commodity junk hardware, he likes it because of the low
> price.


I've successfully done cost of ownership comparisons that seemed to help
users understand the long-term expense. Because there's an
understanding and acceptance of the limited life of consumer grade
electronics, the get the picture quickly. And a couple of them have
taken pride in owning a Cisco router or access point. They want it in
plain sight rather than tucked away out of sight.


>
> Have you ever tried to sell Cisco hardware to a home user? I'm not
> talking about buying used stuff off eBay. I mean new, out of the box,
> with warranty, and possibly a service contract? I have and actually
> succeeded, once. I wish I hadn't because I was expected to provide
> what amounted to an SLA (service level agreement). The Cisco 826
> DSL/router combo was fine, but the PBI/SBC/AT&T DSL service and phone
> lines were awful and accounted for most of the service calls. I lost
> money on this one.
>


Haven't tried to sell new Cisco gear. Can't justify the payback. But
then I've never been burned by defectve used Cisco equipment. I use the
same set-up script for routers (got it off the net and refined it) so I
don't have much variability in the base configuration. The rest of the
set-up is from the web-based set-up tool.

I will admit that setting up a Cisco router takes longer than some of
the plug 'n play stuff, but that is typically done once and then tweaked
shortly after installation. For A/Ps, I've always just used the
web-based tools. They work great and are easy to use.

Sounds like you cut a bad deal for yourself. I've been close to doing
one of those support arrangements myself so I understand the risks. Too
bad you didn't write in a clause for billing (even at a low rate) if the
problem was not in the equipment you were contracted to support.

You could have been suckered into that one with a Trendnet wireless router.

I'm also close to retirement (2 1/2 weeks) so I'm interested in
deinstalling the phone. ;) Except for a few friends. Maybe I can
support them by phone from the Cook Islands. :)


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  #18 (permalink)  
Old 11-15-2007, 01:41 PM
Mike -- Email Ignored
Guest
 
Posts: n/a
Default Re: Better at a Distance

On Fri, 09 Nov 2007 18:10:26 +0000, John Navas wrote:

> On Fri, 09 Nov 2007 17:28:09 GMT, Mike -- Email Ignored
> <m_d_berger_1900@yahoo.com> wrote in <JM0Zi.5$Z01.4@trndny01>:
>
>>On Fri, 09 Nov 2007 17:04:26 +0000, John Navas wrote:
>>
>>> On Fri, 09 Nov 2007 17:01:17 GMT, Mike -- Email Ignored
>>> <m_d_berger_1900@yahoo.com> wrote in <xn0Zi.9$NC.3@trndny07>:
>>>
>>>>On Fri, 09 Nov 2007 16:35:00 +0000, John Navas wrote:
>>>>
>>>>> On Fri, 09 Nov 2007 16:26:30 GMT, Mike -- Email Ignored
>>>>> <m_d_berger_1900@yahoo.com> wrote in <WS%Yi.5$ET.4@trndny03>:


[...]

> Are you sure? Really sure? Otherwise... It could be caused by
> malfunction.
> It could be caused by a neighbor.
> It could be caused by the city.


It looks like it was interference after all. I changed to channel
1, and the problem disappeared.

Thanks for your advice.
Mike.


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  #19 (permalink)  
Old 11-22-2007, 06:25 AM
John Navas
Guest
 
Posts: n/a
Default Re: Better at a Distance

On Tue, 13 Nov 2007 16:30:59 -0600, Cal Vanize
<dont.even.spam.me@myspam.org> wrote in
<AAp_i.707$206.353@newsfe02.lga>:

>Jeff Liebermann wrote:


>> How reliable would you like it? For the average home user, rebooting
>> the wireless router every few weeks is no big deal. After some
>> initial problems, router stressing protocols, such as Bitorrent, work
>> quite well. Granted, I've seem some really bad junk being sold as
>> wireless consumer grade products, but presumably one does not buy from
>> the very bottom of the market.

>
>For the average home user, its a pain in the ass to reboot it.


Actually very simple and easy to use a digital timer on the power.

>And
>typically rebooting occurs more frequently with the age of the device


Doesn't age like that.

>> "Trying" is a bit of an understatement. Even Cisco bought a cheap
>> router company (Linksys) because they thought there was something good
>> about the product. The consumers are not only trying, they've
>> succeeded. There are plenty of user installed wireless systems that
>> work fine out of the box and do not require a CCNE to configure.

>
>And work great for weeks, maybe even a few months. Even Cisco knows
>that Linksys is just consumer-grade crap that won't last.


It actually lasts quite well, years in normal use, well beyond normal
obsolescence.

>> I don't. My guess is about less than 1% genuine hardware failure
>> rate. Most of these are due to power glitches, idiot errors, or
>> physical damage. My biggest headaches are the constant firmware
>> updates required to keep ahead of bugs and exploits, plus companies
>> that abandon their existing customers by NOT releasing firmware
>> updates for known bugs. However, I'm fairly careful to avoid vendors
>> and product that have these issues.

>
>Its been my experience and the experience of those I know that very few
>cheap routers or access points last more than a few months. I've never
>had one last for more than 18 months without constant nursing. ...


I've got a great many running for years without incident.

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

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