Re: [WISPA] Excede (viasat-1) Satalitte Internet

[Greg Ihnen]

I'm not familiar with them but that service has got to have bandwidth caps like 
DirecWay. Also it's hard to believe that Skype and Vonage would work well 
because they must be over-sold (high contention ratio) at that price.

Greg
On Feb 29, 2012, at 8:58 PM, ~NGL~ wrote:

> Anyone run into Excede (viasat-1)  Satalitte Internet? They claim download 
> speeds of 12 Megs and can use Skype and Vonage for $60.00 per month and a 
> $149.95 setup fee.
> Any Comments?
> NGL
>  
> If you can read this Thank A Teacher.
> And if it's in English Thank A Soldier!
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Re: [WISPA] Excede (viasat-1) Satalitte Internet

[Daniel White]

It still has exceedingly bad latency just like any other satellite service,
but the capacity figures are true (at least until those spot beams become
more saturated)


Also watch out for the bandwidth caps, and contract terms.  I'm not sure I
would use Skype or Vonage on a service like that.

 

Daniel White

(303) 746-3590

 

From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On
Behalf Of ~NGL~
Sent: Wednesday, February 29, 2012 6:28 PM
To: WISPA General List
Subject: [WISPA] Excede (viasat-1) Satalitte Internet

 

Anyone run into Excede (viasat-1)  Satalitte Internet? They claim download
speeds of 12 Megs and can use Skype and Vonage for $60.00 per month and a
$149.95 setup fee.

Any Comments?

NGL

 




If you can read this Thank A Teacher.
And if it's in English Thank A Soldier!

 

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Re: [WISPA] transparent caching solution w/TPROXY

[Matt]

> I'll check out those other caching solutions. I was going through the
> ryohnosuke.com website, it's in Spanish (Via google translate). The main
> company referred me to him to coordinate since he speaks English.
>
> To get it setup in the Mikrotik it took a couple of mangle prerouting
> rules and a route with a routing mark. It actually just routes the
> traffic to the cache instead of redirect, this keeps the transparency
> working nicely. If I disable the mangle rules then nothing goes through
> the cache.

In Mikrotik I imagine you just use mangle to add routing marks to port
80 traffic then add routes based on those marks.  Do websites accessed
see the IP of the cache or IP of the user behind the cache?

Can you munge your mangle and routing rules and post them?
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Re: [WISPA] ethernet and towers with FM transmitters

[Marlon K. Schafer (509-982-2181)]

Dexter Magnetics  847-956-1140

0431164181

Those are big enough to wrap the cat5 through 3 times.

marlon

  - Original Message - 
  From: Ben West 
  To: WISPA General List 
  Sent: Wednesday, February 29, 2012 11:58 AM
  Subject: Re: [WISPA] ethernet and towers with FM transmitters


  Might anyone have a recommendation for a cheap supplier of ferrite beads 
large enough to fit thick STP, e.g. like Ubiquiti tough cable?

  -- 
  Ben West
  http://gowasabi.net
  b...@gowasabi.net




--


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Re: [WISPA] ethernet and towers with FM transmitters

[Matt Hoppes]

Yes.. I'd never mount to an AM tower but we were next to one on an FM tower.


Matt Hoppes
Director of Information Technology
Indigo Wireless
+1 (570) 723-7312

On 2/29/12 2:58 PM, Fred Goldstein wrote:
> At 2/29/2012 02:44 PM, Matt Hoppes wrote:
>> We are on a toewer near an AM tower I named Sparky because of the RF
>> burns I got terminating the cat5. --
>
> An AM tower is supposed to be hot, since the tower is the antenna. An
> FM or TV tower is supposed to be a grounded support structure for the
> actual antenna.  I'd never put stuff on an AM tower.  Nor would most
> such towers want stuff on them, since it could throw their performance off.
>
>
>--
>Fred Goldsteink1io   fgoldstein "at" ionary.com
>ionary Consulting  http://www.ionary.com/
>+1 617 795 2701
>
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Re: [WISPA] ethernet and towers with FM transmitters

[Eric Tykwinski]

Monoprice has them, don't know exactly how cheap compared to others they are
though:

http://www.monoprice.com/products/subdepartment.asp?c_id=102
 &cp_id=10240&cs_id=1024011

 

Sincerely,

 

Eric Tykwinski

TrueNet, Inc.

P: 610-429-8300

F: 610-429-3222

 

 

 

From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On
Behalf Of Ben West
Sent: Wednesday, February 29, 2012 2:58 PM
To: WISPA General List
Subject: Re: [WISPA] ethernet and towers with FM transmitters

 

Might anyone have a recommendation for a cheap supplier of ferrite beads
large enough to fit thick STP, e.g. like Ubiquiti tough cable?

-- 
Ben West

http://gowasabi.net
b...@gowasabi.net

 

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Re: [WISPA] ethernet and towers with FM transmitters

[Larry Weidig]

www.mouser.com and search for EMI clamp.  They have a 
lot of options available.


Larry A. Weidig (lwei...@excel.net)
Excel.Net, Inc. - http://www.excel.net/
(920) 452-0455 - Sheboygan/Plymouth area
(888) 489-9995 - Other areas, toll-free

From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf 
Of Ben West
Sent: Wednesday, February 29, 2012 1:58 PM
To: WISPA General List
Subject: Re: [WISPA] ethernet and towers with FM transmitters

Might anyone have a recommendation for a cheap supplier of ferrite beads large 
enough to fit thick STP, e.g. like Ubiquiti tough cable?

--
Ben West
http://gowasabi.net
b...@gowasabi.net

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Re: [WISPA] ethernet and towers with FM transmitters

[Fred Goldstein]

At 2/29/2012 02:44 PM, Matt Hoppes wrote:
>We are on a toewer near an AM tower I named Sparky because of the RF 
>burns I got terminating the cat5. --

An AM tower is supposed to be hot, since the tower is the antenna. An 
FM or TV tower is supposed to be a grounded support structure for the 
actual antenna.  I'd never put stuff on an AM tower.  Nor would most 
such towers want stuff on them, since it could throw their performance off.


  --
  Fred Goldsteink1io   fgoldstein "at" ionary.com
  ionary Consulting  http://www.ionary.com/
  +1 617 795 2701 

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Re: [WISPA] ethernet and towers with FM transmitters

[Josh Luthman]

I know this fits Mohawk direct burial cable but it didn't solve my
ethernet problems on an FM tower.

http://www.mouser.com/ProductDetail/Fair-Rite/0431164181/?qs=sGAEpiMZZMukHu%252bjC5l7Yer6NHO3r2EH2hq2kvibEAY%3D

Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373



On Wed, Feb 29, 2012 at 2:58 PM, Ben West  wrote:
> Might anyone have a recommendation for a cheap supplier of ferrite beads
> large enough to fit thick STP, e.g. like Ubiquiti tough cable?
>
> --
> Ben West
> http://gowasabi.net
> b...@gowasabi.net
>
>
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>
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Re: [WISPA] ethernet and towers with FM transmitters

[Greg Ihnen]

Something I've heard talked about in ham/engineering circles is don't have 
cable runs that are near a half wavelength or multiple half wavelengths of the 
frequency that's giving you trouble. It's a last ditch effort but it might be 
worth thinking about. Ferrites are great. When you put them along the cable 
again avoid half wave length intervals. You want to do everything to discourage 
the cable from resonating at the interfering frequency.

Greg
On Feb 29, 2012, at 12:31 PM, Marlon K. Schafer (509-982-2181) wrote:

> This problem is a bitch.  We're on a station that's "only" 20k watts and 
> Ethernet issues are severe.
> 
> We finally had pretty good luck by moving the radios down and running high 
> grade coax to the antennas.  We also run metal shielded cat5 with the proper 
> ends.
> 
> Finally I installed ferrite beads on both ends of all cat 5 runs.
> 
> Things are running pretty well now.  Turns out that cat5 and fm radio are 
> basically in the same frequency area.
> 
> My best advice?  Go find a different tower to use :-).
> 
> But it can be done.  All electronics in a metal enclosure also.  Jumper cat5 
> also needs to be shielded cable with grounded connectors.  Sometimes I put 
> ferrite beads on them as well.
> 
> marlon
> 
> - Original Message - 
> From: "Tim Warnock" 
> To: "'WISPA General List'" 
> Sent: Tuesday, February 28, 2012 6:15 PM
> Subject: [WISPA] ethernet and towers with FM transmitters
> 
> 
>> Hi All,
>> 
>> I have a question as to how other operators are handling POE radio links 
>> and
>> high power FM transmitters.
>> 
>> We often see things like a radio will run errors or drop to 10mbps instead
>> of 100mbps until we find a good position on the tower that its happy with.
>> Once its happy we never have an issue again.
>> 
>> We've tried earthing, not earthing, STP, UTP. Nothing seems to 
>> definitively
>> solve the issue.
>> 
>> Does anyone have any advice they'd like to share? It would be muchly
>> appreciated.
>> 
>> Thanks
>> Tim
>> 
>> ___
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> 
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Re: [WISPA] ethernet and towers with FM transmitters

[Ben West]

Might anyone have a recommendation for a cheap supplier of ferrite beads
large enough to fit thick STP, e.g. like Ubiquiti tough cable?

-- 
Ben West
http://gowasabi.net
b...@gowasabi.net
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Re: [WISPA] ethernet and towers with FM transmitters

[Matt Hoppes]

We are on a toewer near an AM tower I named Sparky because of the RF burns I 
got terminating the cat5. 
--
Matt Hoppes
Director of Information Technology
Indigo Wireless
1 (570) 723-7312

Justin Wilson  wrote:

>   The biggest thing I stress with any FM tower is to get an experienced FM
>tower climber crew to give your their opinion on the tower before
>installing any equipment on it.  Too many times I have seen an FM tower
>with poor grounds, missing grounds, improperly installed hardline, etc.
>Many times I have found it to be the "tower" more than your equipment.
>Some of my guys were on a small FM station with a 2k transmitter.  The
>tower had 1 small ground, and was missing the bonding to the tower. The
>tower is named sparky due to the RF charging the whole tower.  No amount
>of work on the cat-5 could have ever fixed this.
>
>   Justin
>
>--
>Justin Wilson 
>Aol & Yahoo IM: j2sw
>http://www.mtin.net/blog ­ xISP News
>http://www.twitter.com/j2sw ­ Follow me on Twitter
>
>
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Re: [WISPA] ethernet and towers with FM transmitters

[Justin Wilson]

The biggest thing I stress with any FM tower is to get an experienced FM
tower climber crew to give your their opinion on the tower before
installing any equipment on it.  Too many times I have seen an FM tower
with poor grounds, missing grounds, improperly installed hardline, etc.
Many times I have found it to be the "tower" more than your equipment.
Some of my guys were on a small FM station with a 2k transmitter.  The
tower had 1 small ground, and was missing the bonding to the tower. The
tower is named sparky due to the RF charging the whole tower.  No amount
of work on the cat-5 could have ever fixed this.

Justin

--
Justin Wilson 
Aol & Yahoo IM: j2sw
http://www.mtin.net/blog ­ xISP News
http://www.twitter.com/j2sw ­ Follow me on Twitter


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Re: [WISPA] PPPoE and home router question

[Marco Coelho]

Netgear routers seem to provide the most stable connection in our
experience.  Always make sure the firmware is up to date.

On Tue, Feb 28, 2012 at 9:41 AM, Andy Trimmell wrote:

> We use Cisco E1000 E1200 WRT54g. We also found out that WRT110 120 and 300
> 320 do not pass traffic through PPPoE no matter what you do. We’re also
> using a Microsoft network if that question was to come up.
>
> ** **
>
> I’ve also found out that Belkin’s are horrible for staying connected and
> Netgears by default are dial on demand instead of Keep Alive.
>
> ** **
>
> *From:* wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] *On
> Behalf Of *Phil Curnutt
> *Sent:* Tuesday, February 28, 2012 9:45 AM
> *To:* WISPA General List
> *Subject:* [WISPA] PPPoE and home router question
>
> ** **
>
> We have recently started switching over to PPPoE on our network and are
> having a devil of a time with home routers disconnecting and reconnecting.
>  Have any of you using PPPoE found any particular router that works best on
> your wireless network?
>
> ** **
>
> Phil
>
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>


-- 
Marco C. Coelho
Argon Technologies Inc.
POB 875
Greenville, TX 75403-0875
903-455-5036
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Re: [WISPA] ethernet and towers with FM transmitters

[Marlon K. Schafer (509-982-2181)]

This problem is a bitch.  We're on a station that's "only" 20k watts and 
Ethernet issues are severe.

We finally had pretty good luck by moving the radios down and running high 
grade coax to the antennas.  We also run metal shielded cat5 with the proper 
ends.

Finally I installed ferrite beads on both ends of all cat 5 runs.

Things are running pretty well now.  Turns out that cat5 and fm radio are 
basically in the same frequency area.

My best advice?  Go find a different tower to use :-).

But it can be done.  All electronics in a metal enclosure also.  Jumper cat5 
also needs to be shielded cable with grounded connectors.  Sometimes I put 
ferrite beads on them as well.

marlon

- Original Message - 
From: "Tim Warnock" 
To: "'WISPA General List'" 
Sent: Tuesday, February 28, 2012 6:15 PM
Subject: [WISPA] ethernet and towers with FM transmitters


> Hi All,
>
> I have a question as to how other operators are handling POE radio links 
> and
> high power FM transmitters.
>
> We often see things like a radio will run errors or drop to 10mbps instead
> of 100mbps until we find a good position on the tower that its happy with.
> Once its happy we never have an issue again.
>
> We've tried earthing, not earthing, STP, UTP. Nothing seems to 
> definitively
> solve the issue.
>
> Does anyone have any advice they'd like to share? It would be muchly
> appreciated.
>
> Thanks
> Tim
>
> ___
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> Wireless@wispa.org
> http://lists.wispa.org/mailman/listinfo/wireless 

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Re: [WISPA] New employee quiz

[Josh Luthman]

With the power of Google and those skills I totally agree as well.

Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Feb 29, 2012 9:34 AM, "Simon Westlake"  wrote:

>  Yeah, and that's the thing I don't like about very specific questions
> because, honestly, who cares if you do as long as you understand the
> concept. If I'd say to someone 'what's the subnet mask for a /25' or
> something like that and they answered 'I don't remember off the top of my
> head but I can figure it out in 2 minutes if you give me some paper or a
> subnet calculator' I'd check it off as 'passed' - same deal with things
> like the Cisco questions if they answered 'Umm, I'd do show ip ospf then
> tab a couple of times until I found the right command, I don't remember
> exactly'
>
> Troubleshooting questions are the gold ones, I don't remember off the top
> of my head all the syntax of how to build an access list to control prefix
> advertisement through BGP on a Cisco but I could tell you what you need to
> do to do it and I think that is way more important in a hire - do they know
> concepts and can they figure stuff out.
>
> On 2/29/2012 5:54 AM, Matt Hoppes wrote:
>
> I always liked situational troubleshooting ones because I use a subnet
> calculator :P
>
>
>
> On Feb 28, 2012, at 23:37, "Simon Westlake"  wrote:
>
>  Well, I think some of the ones I mentioned are alright. It depends if
> you're hiring tech support or a network engineer but for mid-level tech
> support/pseudo engineer type role I'd ask things like:
>
> What is a subnet mask?
> If they got that one.. what is a /29 subnet mask?
> If I told you a subnet was 192.168.10.0/25, what is the network and
> broadcast IP? Name one usable IP in this range.
>
> Usually lets you know if they understand subnetting. I've had people break
> out pencil and paper and do it binary style - at least they know how but
> lets you know they learned it in a book, they don't do it regularly. Not
> good or bad just useful info.
>
> The NAT/port forwarding one I mentioned earlier I always found useful,
> lets you know how their brain works when troubleshooting. You could
> probably expand this to wireless (you put up an access point, connected
> user has 4 bars, next day they have 2 bars, how would you start
> troubleshooting?)
>
> I always liked the situational ones because anyone can memorize how to
> subnet but what you really want is someone with a good logical brain for
> solving problems.
>
> I used to ask some about ports (e.g. what port does SMTP run on, what
> protocol typically runs on port 110), I'd ask things like 'how do you see
> the status of all OSPF neighbors in a Cisco router', maybe not so important
> if you don't use Cisco gear but you can ask general questions in that case
> (what does cost do in an OSPF, for example.)
>
> How would you identify/troubleshoot a speed/duplex problem on an Ethernet
> interface.. describe how you'd make an Ethernet cable (bonus points if they
> know T-568A and B but who cares, really, it's more about if they know how
> and they can tell you.. double bonus if they end with 'and then I get out
> my tester and make sure the cable is good before I plug it in').. what is
> the difference between single and multimode fiber..
>
> Really, I just used to think about the things I used to have to deal with
> on a daily basis and tried to construct scenarios out of them. If I
> couldn't, I'd just ask a specific question. I will say, the scenario type
> questions are by far the best. Someone who has done their A+ might memorize
> a bunch of data but they can't always put it into practice. So, I'd just
> lay out 10 problems you've had to solve or try to brainstorm a few and
> write them down from simplest to hardest. If they can't answer the first
> 2-3, you're probably done. The NAT one was a good opener (web server on
> private IP, why can't external access it, etc), I'd do some stuff like
> computer X is plugged into a switch with an IP of 192.168.10.5, subnet mask
> 255.255.255.128, why can't he ping 192.168.10.253 255.255.255.128?
>
> Throw a bunch of questions in the middle like 'what's your favorite
> Android 'phone' or 'what video game did you last play' to keep them loose
> and not too stressed out.
>
> I used to have to do this a lot and I ended up winging it at the end a lot
> of the time. Once you've done 20-30 interviews, you can figure out
> someone's technical ability pretty quickly. The hard part is figuring out
> if they are going to be a giant pain in the ass in 3 months.
>
>  --
> *From*: "Josh Luthman" 
> *Sent*: Tuesday, February 28, 2012 5:18 PM
> *To*: "WISPA General List" 
> *Subject*: Re: [WISPA] New employee quiz
>
> I agree on who to hire, but I don't have the brain to come up with
> those questions to weed out the first set!
>
> Josh Luthman
> Office: 937-552-2340
> Direct: 937-552-2343
> 1100 Wayne St
> Suite 1337
> Troy, OH 45373
>
>
>
> On Tue, Feb

Re: [WISPA] New employee quiz

[Simon Westlake]

Yeah, and that's the thing I don't like about very specific questions 
because, honestly, who cares if you do as long as you understand the 
concept. If I'd say to someone 'what's the subnet mask for a /25' or 
something like that and they answered 'I don't remember off the top of 
my head but I can figure it out in 2 minutes if you give me some paper 
or a subnet calculator' I'd check it off as 'passed' - same deal with 
things like the Cisco questions if they answered 'Umm, I'd do show ip 
ospf then tab a couple of times until I found the right command, I don't 
remember exactly'


Troubleshooting questions are the gold ones, I don't remember off the 
top of my head all the syntax of how to build an access list to control 
prefix advertisement through BGP on a Cisco but I could tell you what 
you need to do to do it and I think that is way more important in a hire 
- do they know concepts and can they figure stuff out.


On 2/29/2012 5:54 AM, Matt Hoppes wrote:
I always liked situational troubleshooting ones because I use a subnet 
calculator :P




On Feb 28, 2012, at 23:37, "Simon Westlake" > wrote:


Well, I think some of the ones I mentioned are alright. It depends if 
you're hiring tech support or a network engineer but for mid-level 
tech support/pseudo engineer type role I'd ask things like:


What is a subnet mask?
If they got that one.. what is a /29 subnet mask?
If I told you a subnet was 192.168.10.0/25, what is the network and 
broadcast IP? Name one usable IP in this range.


Usually lets you know if they understand subnetting. I've had people 
break out pencil and paper and do it binary style - at least they 
know how but lets you know they learned it in a book, they don't do 
it regularly. Not good or bad just useful info.


The NAT/port forwarding one I mentioned earlier I always found 
useful, lets you know how their brain works when troubleshooting. You 
could probably expand this to wireless (you put up an access point, 
connected user has 4 bars, next day they have 2 bars, how would you 
start troubleshooting?)


I always liked the situational ones because anyone can memorize how 
to subnet but what you really want is someone with a good logical 
brain for solving problems.


I used to ask some about ports (e.g. what port does SMTP run on, what 
protocol typically runs on port 110), I'd ask things like 'how do you 
see the status of all OSPF neighbors in a Cisco router', maybe not so 
important if you don't use Cisco gear but you can ask general 
questions in that case (what does cost do in an OSPF, for example.)


How would you identify/troubleshoot a speed/duplex problem on an 
Ethernet interface.. describe how you'd make an Ethernet cable (bonus 
points if they know T-568A and B but who cares, really, it's more 
about if they know how and they can tell you.. double bonus if they 
end with 'and then I get out my tester and make sure the cable is 
good before I plug it in').. what is the difference between single 
and multimode fiber..


Really, I just used to think about the things I used to have to deal 
with on a daily basis and tried to construct scenarios out of them. 
If I couldn't, I'd just ask a specific question. I will say, the 
scenario type questions are by far the best. Someone who has done 
their A+ might memorize a bunch of data but they can't always put it 
into practice. So, I'd just lay out 10 problems you've had to solve 
or try to brainstorm a few and write them down from simplest to 
hardest. If they can't answer the first 2-3, you're probably done. 
The NAT one was a good opener (web server on private IP, why can't 
external access it, etc), I'd do some stuff like computer X is 
plugged into a switch with an IP of 192.168.10.5, subnet mask 
255.255.255.128, why can't he ping 192.168.10.253 255.255.255.128?


Throw a bunch of questions in the middle like 'what's your favorite 
Android 'phone' or 'what video game did you last play' to keep them 
loose and not too stressed out.


I used to have to do this a lot and I ended up winging it at the end 
a lot of the time. Once you've done 20-30 interviews, you can figure 
out someone's technical ability pretty quickly. The hard part is 
figuring out if they are going to be a giant pain in the ass in 3 months.



*From*: "Josh Luthman" >

*Sent*: Tuesday, February 28, 2012 5:18 PM
*To*: "WISPA General List" >

*Subject*: Re: [WISPA] New employee quiz

I agree on who to hire, but I don't have the brain to come up with
those questions to weed out the first set!

Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373



On Tue, Feb 28, 2012 at 6:12 PM, Simon Westlake > wrote:

> I just dug for it, doesn't look like I kept it, sorry - it's probably
> languishing in a file cabinet in Milwaukee. I wr

Re: [WISPA] New employee quiz

[Matt Hoppes]

I always liked situational troubleshooting ones because I use a subnet 
calculator :P



On Feb 28, 2012, at 23:37, "Simon Westlake"  wrote:

> Well, I think some of the ones I mentioned are alright. It depends if you're 
> hiring tech support or a network engineer but for mid-level tech 
> support/pseudo engineer type role I'd ask things like:
> 
> What is a subnet mask?
> If they got that one.. what is a /29 subnet mask?
> If I told you a subnet was 192.168.10.0/25, what is the network and broadcast 
> IP? Name one usable IP in this range.
> 
> Usually lets you know if they understand subnetting. I've had people break 
> out pencil and paper and do it binary style - at least they know how but lets 
> you know they learned it in a book, they don't do it regularly. Not good or 
> bad just useful info.
> 
> The NAT/port forwarding one I mentioned earlier I always found useful, lets 
> you know how their brain works when troubleshooting. You could probably 
> expand this to wireless (you put up an access point, connected user has 4 
> bars, next day they have 2 bars, how would you start troubleshooting?)
> 
> I always liked the situational ones because anyone can memorize how to subnet 
> but what you really want is someone with a good logical brain for solving 
> problems.
> 
> I used to ask some about ports (e.g. what port does SMTP run on, what 
> protocol typically runs on port 110), I'd ask things like 'how do you see the 
> status of all OSPF neighbors in a Cisco router', maybe not so important if 
> you don't use Cisco gear but you can ask general questions in that case (what 
> does cost do in an OSPF, for example.)
> 
> How would you identify/troubleshoot a speed/duplex problem on an Ethernet 
> interface.. describe how you'd make an Ethernet cable (bonus points if they 
> know T-568A and B but who cares, really, it's more about if they know how and 
> they can tell you.. double bonus if they end with 'and then I get out my 
> tester and make sure the cable is good before I plug it in').. what is the 
> difference between single and multimode fiber..
> 
> Really, I just used to think about the things I used to have to deal with on 
> a daily basis and tried to construct scenarios out of them. If I couldn't, 
> I'd just ask a specific question. I will say, the scenario type questions are 
> by far the best. Someone who has done their A+ might memorize a bunch of data 
> but they can't always put it into practice. So, I'd just lay out 10 problems 
> you've had to solve or try to brainstorm a few and write them down from 
> simplest to hardest. If they can't answer the first 2-3, you're probably 
> done. The NAT one was a good opener (web server on private IP, why can't 
> external access it, etc), I'd do some stuff like computer X is plugged into a 
> switch with an IP of 192.168.10.5, subnet mask 255.255.255.128, why can't he 
> ping 192.168.10.253 255.255.255.128?
> 
> Throw a bunch of questions in the middle like 'what's your favorite Android 
> 'phone' or 'what video game did you last play' to keep them loose and not too 
> stressed out.
> 
> I used to have to do this a lot and I ended up winging it at the end a lot of 
> the time. Once you've done 20-30 interviews, you can figure out someone's 
> technical ability pretty quickly. The hard part is figuring out if they are 
> going to be a giant pain in the ass in 3 months.
> 
> From: "Josh Luthman" 
> Sent: Tuesday, February 28, 2012 5:18 PM
> To: "WISPA General List" 
> Subject: Re: [WISPA] New employee quiz
> 
> I agree on who to hire, but I don't have the brain to come up with
> those questions to weed out the first set!
> 
> Josh Luthman
> Office: 937-552-2340
> Direct: 937-552-2343
> 1100 Wayne St
> Suite 1337
> Troy, OH 45373
> 
> 
> 
> On Tue, Feb 28, 2012 at 6:12 PM, Simon Westlake  wrote:
> > I just dug for it, doesn't look like I kept it, sorry - it's probably
> > languishing in a file cabinet in Milwaukee. I wrote it for TWC when I
> > worked there since the HR interviews were generally things like 'Why do
> > you like sunshine?' and 'What is your favorite color of hair?' so they
> > kept hiring people who had 'good' resumes but zero actual knowledge.
> >
> > The funny thing there was that the kind of resumes I throw in the
> > garbage here (skills: Microsoft Word, Microsoft Excel, Adobe Acrobat,
> > Notepad, Calculator, Pacman, Windows Start Menu, JPEG, CPU,
> > Keyboard/Mouse, etc) got through most of the screening there because
> > they could check off 'Knows Microsoft Word, knows Pacman' and pass it on
> > as a stellar resume. The guys who wrote things like 'Built a flux
> > capacitor out of spare motherboards, constructed a satellite dish out of
> > cardboard to watch Iranian TV, write assembly in the bathroom' never
> > made it through because they didn't know Microsoft Word.
> >
> > So, I had to come up with something to screen out the first crowd and
> > make sure the second were what they said they were. The stuff I said
> > be

Re: [WISPA] ethernet and towers with FM transmitters

[Matt Hoppes]

+1 on ferrits. 



On Feb 28, 2012, at 22:23, Joe Fiero  wrote:

> Tim,
> 
> I have had 100% success by using a good quality shielded cable and following
> a strict bonding regiment.  Bonding the antenna, radio, mast and cable to
> the tower at the top is imperative, as is the same process at the bottom.
> It's also important that the tower be bonded and that the bond is common
> with that in the equipment room. Make sure the inside end of the cable is
> bonded as well. In other words, there should be no difference in potential
> between the ground in the equipment room, the tower or your equipment on the
> tower.  You must carry that bonding through to the rack and equipment you
> place in the room as well.  Also, be sure to use grounded cable on jumpers.
> And the real trick is putting ferrite beads on both ends of the POE cable.
> 
> I had a site exhibiting between 50 and 70 percent packet loss between the
> topside radio and the router in the room when initially installed.  The
> installer never noticed there were two FM stations on the tower ( 55Kw and
> 30Kw ).  We even swapped radio equipment twice because he insisted there
> were no transmitters in close proximity.  Once we "discovered" the FM
> stations he did as I described above and we went immediately to 0% packet
> loss from the router.
> 
> Joe
> 
> 
> -Original Message-
> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On
> Behalf Of Tim Warnock
> Sent: Tuesday, February 28, 2012 9:15 PM
> To: 'WISPA General List'
> Subject: [WISPA] ethernet and towers with FM transmitters
> 
> Hi All,
> 
> I have a question as to how other operators are handling POE radio links and
> high power FM transmitters.
> 
> We often see things like a radio will run errors or drop to 10mbps instead
> of 100mbps until we find a good position on the tower that its happy with.
> Once its happy we never have an issue again.
> 
> We've tried earthing, not earthing, STP, UTP. Nothing seems to definitively
> solve the issue.
> 
> Does anyone have any advice they'd like to share? It would be muchly
> appreciated.
> 
> Thanks
> Tim
> 
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