Community discussions

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by karlos
Tue Oct 08, 2013 2:18 pm
Forum: Wireless Networking
Topic: nv2 multilink problem
Replies: 94
Views: 27299

Re: nv2 multilink problem

is this problem with multihop for nv2 and nstream solved in version 6.4??
*) wireless - improved 802.11n wireless retransmission (doesn't effect nstreme/nv2)
by karlos
Fri Jul 12, 2013 10:28 pm
Forum: RouterBOARD hardware
Topic: SXT signal level disproportion
Replies: 12
Views: 2330

Re: SXT signal level disproportion

Sorry you missed the issue.. Unfortunately system says it has -40, but the real value is by this one -60dBm.. You can see full quality, so that is it. Not you casse. Thats what i am talking about.. Ok, my calculated values are neraly the same what i see in real usage (not on table). I dont have an ...
by karlos
Fri Jul 12, 2013 10:21 pm
Forum: Wireless Networking
Topic: PtP 17GHz with Alcoma MP vs Saf Lumina
Replies: 32
Views: 7733

Re: PtP 17GHz with Alcoma MP vs Saf Lumina

You may be interested in this solution: Siae AlfoPlus 17Ghz. It's much better than Alcoma, because it has QAM1024. As I know it's also cheaper. Its not cheaper and Alcoma supports - Channel bandwidth 3.5 - 112 MHz - Modulation scheme QPSK - 1024QAM - Transmission capacity up to 920 Mbps full duplex...
by karlos
Thu Jul 11, 2013 10:39 pm
Forum: Wireless Networking
Topic: PtP 17GHz with Alcoma MP vs Saf Lumina
Replies: 32
Views: 7733

Re: PtP 17GHz with Alcoma MP vs Saf Lumina

we use many Alcomas and they work great, exactly as fas as Alcoma declares. So if you buy for example MP360 link and Alcoma sais it will bridge 386Mbit , than it will. So this is what i like.

Not like 1,4Gbit Airfiber runnig max 300Mbit duplex or 400Mbit siklu running 150Mbit duplex
by karlos
Thu Jul 11, 2013 10:32 pm
Forum: RouterBOARD hardware
Topic: SXT signal level disproportion
Replies: 12
Views: 2330

Re: SXT signal level disproportion

Here we go what it makes as well.. https://plus.google.com/u/0/photos/103173910590561848499/albums/5899377886965906929/5899377885310157762?pid=5899377885310157762&oid=103173910590561848499 Vážený pane Peterko, myslím, že právě vzhledem k vašich znalostem a zkušenostem jistě víte, že Mikrotik není j...
by karlos
Tue Mar 26, 2013 11:08 pm
Forum: RouterBOARD hardware
Topic: CCR-warranty extension
Replies: 21
Views: 5596

Re: CCR-warranty extension

It is standard practice to offer one year manufacturing warranty and additional one year store warranty. Even Apple has the same terms in Europe. About extended warranty for CCR, we will discuss it with our sales department. Yes, even HP started with 12m waranty on cheap Notebook models, but store ...
by karlos
Sun Mar 03, 2013 3:28 pm
Forum: Wireless Networking
Topic: Low throughput on sextant with 300mbps/300mbps ( NV2 !!! )
Replies: 42
Views: 8525

Re: Low throughput on sextant with 300mbps/300mbps ( NV2 !!!

Try to use just one chain. I found that dual chain using 40MHz channel modulating 300/300Mbit Btested over 200Mbit UPD is pretty slower than single chain on 40MHz channel. I can do always over 65 up to 100Mbit real TSP data on single chain 40Mhz channel Nv2. But was never able to do at least 60Mbit ...
by karlos
Tue Dec 04, 2012 2:46 pm
Forum: Wireless Networking
Topic: JUST very good card to card throughput (433GL)
Replies: 10
Views: 2313

Re: JUST very good card to card throughput (433GL)

I have reported this problem meny times...... no answer. We have some links going 300/300Mbit modulation speed, going over 200Mbit using Btest, but normal data from Internet to PC are comming much slower ... cca 50-60Mbit. I dont know why. We tested like that: 1100AH as Btest Master <-> 433GL + R52H...
by karlos
Tue Dec 04, 2012 12:02 pm
Forum: Wireless Networking
Topic: nv2 multilink problem
Replies: 94
Views: 27299

Re: nv2 multilink problem

8ms average is prety much and latency is the biggest problem of NV2.... Please read . I have written that " not just a latency of this link " Latency on the link alone is much smaller. 8ms is from our office trough, MyPC - Router - 700m 80GHz link - switch - 1km 24GHz link - switch - OSPF router - ...
by karlos
Wed Nov 28, 2012 2:44 pm
Forum: Wireless Networking
Topic: nv2 multilink problem
Replies: 94
Views: 27299

Re: nv2 multilink problem

2 denis: Case of disconnects...... i found that on longer distances (1km and more) or in noisy area works single chain 802.11n nv2 as the best. I have also reported that even if 40MHz MiMO link shows 300/300Mbit and Btest shows great numbers, in real the "slower" 40HMz SiSo (just chain 0) works fast...
by karlos
Mon Nov 26, 2012 6:00 pm
Forum: Wireless Networking
Topic: nv2 multilink problem
Replies: 94
Views: 27299

Re: nv2 multilink problem

MT support does not answer again? No idea? NO advice?
The only advice is : "If you dont answer, the problem vanishes" :lol:

I am really sorry. If we will help resolve problem, and there is no interest or will.
by karlos
Tue Nov 20, 2012 11:30 am
Forum: Wireless Networking
Topic: nv2 multilink problem
Replies: 94
Views: 27299

Re: nv2 multilink problem

Dear ULDIS: we too are trying to make some tests in "LAB" but it looks like it is more and more useless. MK links are working great on table but if we put it outsides, something changes...... and its not so great like on table before In opposite to this, if we try to test some "PRO" links 10-80GHz i...
by karlos
Tue Nov 20, 2012 11:19 am
Forum: Wireless Networking
Topic: nv2 multilink problem
Replies: 94
Views: 27299

Re: nv2 multilink problem

I am sorry to report nearly the same problem. If we use more than one hop on nv2 there is unexplained loss of transfer speed. We have tested it on link (Dual nv2/40MHz channel) -52/-52dB 300/300Mbit 98/99CCQ and next hop link (Single nv2/40MHz channel) -49/-48dB 150/150Mbit 85/100CCQ and at last the...
by karlos
Tue Sep 18, 2012 9:55 am
Forum: RouterBOARD hardware
Topic: metal 5shpn PTP channel width 20/40 above or belwo ?
Replies: 20
Views: 6919

Re: metal 5shpn PTP channel width 20/40 above or belwo ?

I think your setting is wrong. If you select Frequency 6040MHz you need to add this frequency on other side to Scan List. -79/-75dB is not a good signal level. We like to see -50 to -55dB as perfect link and to -61dB as acceptable link. Everything over 70dB is wrong for us.
by karlos
Thu Jun 28, 2012 3:20 pm
Forum: Wireless Networking
Topic: R52N with Ufl
Replies: 2
Views: 669

Re: R52N with Ufl

As emergency if ULF needed, we use Compex 200NX and it works.
by karlos
Fri Jun 22, 2012 2:00 pm
Forum: General
Topic: v5.18 released
Replies: 92
Views: 25741

Re: v5.18 released

*) wireless - do not use bridge and WDS mode on AP-AP links, causes loops; I'm a bit confused here...; is this a problem in previous version that now is solved? Or is the bridge and WDS funcion on AP-AP links causing loops and in 5.18 is therefore not recommend to use? I suppose it is a problem sol...
by karlos
Fri Jun 15, 2012 12:56 pm
Forum: RouterBOARD hardware
Topic: RB2011LS-IN - normal power conector ?
Replies: 5
Views: 1110

Re: RB2011LS-IN - normal power conector ?

Haha :lol: we also use Poe not the "included" power supply. But this is nothing what screwdriver cant solve.
by karlos
Fri Jun 15, 2012 12:52 pm
Forum: RouterBOARD hardware
Topic: Gigabit PoE wiring (e.g RBGPOE)
Replies: 12
Views: 8989

Re: Gigabit PoE wiring (e.g RBGPOE)

Whitepaper from Texas Instruments will help you to understand.

Basicly you just need magnetics for seaparatinf the DC (power supply) from AC current (data transfer). So other capacitors, and resistors for make it clean.
by karlos
Thu Jun 14, 2012 3:58 pm
Forum: RouterBOARD hardware
Topic: Positive grounding request
Replies: 5
Views: 1084

Re: Positive grounding request

Thank you guys. Please look at my second request http://forum.mikrotik.com/viewtopic.php?f=3&t=62777 :D Yes we use DC-DC convertors from battery pack (32-56V) to stable 24V, but every piece of some hardware is some kind of possible problem. So we like to see less hardware than complicated solutions....
by karlos
Wed Jun 13, 2012 4:43 pm
Forum: RouterBOARD hardware
Topic: Positive grounding request
Replies: 5
Views: 1084

Re: Positive grounding request

Thank you for your information Janisk. The RB800 is pretty big biest. It will not fit in most of our enclusures. We are now impressed about performance/prize value of 433GL, and already this board is very long when using 2 or 3 Hn cards.
by karlos
Tue Jun 12, 2012 2:59 pm
Forum: RouterBOARD hardware
Topic: Positive grounding request
Replies: 5
Views: 1084

Positive grounding request

Another request will be : positive grounding instead of negative. Why? The most profi wireless equipment uses -48V with positive grounding. Our technicians did damaged some RBs placing it on the same tower like profi links and grounding it together ;-( We need to use separate independant batery circ...
by karlos
Tue Jun 12, 2012 2:43 pm
Forum: RouterBOARD hardware
Topic: PoE Gigabit panel
Replies: 0
Views: 772

PoE Gigabit panel

Hi, we are using this PoE panels http://www.wifihw.cz/galerie/1_1870/b-poe-pan12-b-12-portovy-pasivni-poe-injektor-panel-original.jpg because it makes out instalations pretty clean and removes the cable mess. But this is just passive 100Mbit version. Did somebody 1Gbit poe panel ? I am sure somebody...
by karlos
Tue Jun 12, 2012 2:27 pm
Forum: General
Topic: ETA on Beta3?
Replies: 54
Views: 14362

Re: ETA on Beta3?

I would use Terminal and serial cable to go in bootloader, realsh it with newest possible, and than netinstall last "stable" Ros. You just need a backup of licence key. If you dont have it, contact support of Mikrotik with HW ID and they will help you for sure. Czech: Přihlaš se terminálem přes seri...
by karlos
Fri Jun 08, 2012 10:03 pm
Forum: General
Topic: ROS v6 Suggestions
Replies: 76
Views: 20473

Re: ROS v6 Suggestions

Upgrades: We would like to be able upgrade RB ros remotly in whole network Possible today, just use Dude, it's a matter of one right-click in Dude. How you imagine doing upgrade for multiple devices without central management server? I've never seen such a technology ;-) As for boot firmware, it's ...
by karlos
Thu Jun 07, 2012 4:18 pm
Forum: Wireless Networking
Topic: 180Mb TCP FDX with MIMO 3x3
Replies: 24
Views: 6057

Re: 180Mb TCP FDX with MIMO 3x3

And i made another test: 433AH running Btest <-ETH-> 433GL <-nv2 MIMO 2+2-> 433GL <-ETH-> 1100AH Btest Server Running UDP test in both directions nearly to 100Mbit in both ways, just limited by 433AH 100Mbit port and also CPU on 433AH was on 100%load. Load on 433GL was cca 70%. But this is still jus...
by karlos
Thu Jun 07, 2012 3:05 pm
Forum: Wireless Networking
Topic: 180Mb TCP FDX with MIMO 3x3
Replies: 24
Views: 6057

Re: 180Mb TCP FDX with MIMO 3x3

What is CPU usage when you are doing tests from laptops?
RB has 20-30% load, so CPU is boring ;-) coz the new RB433GL works on 800MHz at default.
by karlos
Thu Jun 07, 2012 10:24 am
Forum: General
Topic: RouterOS v5.17 released
Replies: 47
Views: 16744

Re: RouterOS v5.17 released

The Nv2 rate tx algorithm has been tuned to support better ping times. I agree, the ping time are better on interfaces with some moderate traffic. But still very big jitter, when with very low or no traffic. But this is the problem with waiting for some data to send just one big packet istead of fe...
by karlos
Thu Jun 07, 2012 10:15 am
Forum: General
Topic: ROS v6 Suggestions
Replies: 76
Views: 20473

Re: ROS v6 Suggestions

May be this is not all about ros 6.xx wishes , may be its also about new winbox but still please read it. Queue rates: I think its time to update the queue speeds for todays needs. I can put it manualy, but it will be faster if its in the list box may be. Prefered views: We have some preffered views...
by karlos
Wed Jun 06, 2012 5:55 pm
Forum: Wireless Networking
Topic: 180Mb TCP FDX with MIMO 3x3
Replies: 24
Views: 6057

Re: 180Mb TCP FDX with MIMO 3x3

Card rates Fixed do 15dBm Distance 1800m Signal Strenght -50/-50dBm CCQ 97/96% Rate 300/300Mbps Frequency 5500Mhz Band 5GHz only N 40MHz width protocol nv2 Datarates advanced 0+1chain HT AMPDU 0+4 HT guard ANY lowering card power will cause lowered transfer rate more card power will not help but doe...
by karlos
Wed Jun 06, 2012 2:20 pm
Forum: Wireless Networking
Topic: 180Mb TCP FDX with MIMO 3x3
Replies: 24
Views: 6057

Re: 180Mb TCP FDX with MIMO 3x3

Karlos, what do you mean by "normal traffic"? many programs don't actually utilize the maximum possible speed. you could test with multiple FTP connections Yes, to test normal traffic we use just normal PC using normal multiple http or ftp transfers. We found some places in our network that work ve...
by karlos
Wed Jun 06, 2012 12:46 pm
Forum: Wireless Networking
Topic: 180Mb TCP FDX with MIMO 3x3
Replies: 24
Views: 6057

Re: 180Mb TCP FDX with MIMO 3x3

Sory Normis, but Btest results are for me meaningless. We made some p2p 2+2Mimo links showing Btest results over 200Mbits but the normal trafic was around 50-70Mbit, using 1+1chain Btest shows 100+Mbits and real performance 90+Mbits .......... So right now we are preparing brand new p2p link, using ...
by karlos
Thu May 03, 2012 11:04 am
Forum: Beginner Basics
Topic: many rb433 hang
Replies: 7
Views: 1159

Re: many rb433 hang

Battery is a HUGE Capacitor, you dont need to install another. What AWG(diameter) has your cable between battery, regulator, MK and solar panel ? We normaly use 4-8mm2 for single or two MK but on main POPs where are 8-16MK we use 16mm2 cables It is very important to use very thick cables = less volt...
by karlos
Thu Mar 15, 2012 1:01 pm
Forum: RouterBOARD hardware
Topic: SFP module
Replies: 100
Views: 57001

Re: SFP module

For me SFP type, LC connector and BiDi (WDM) on single wire
by karlos
Sun Feb 19, 2012 7:38 pm
Forum: Wireless Networking
Topic: Non-Traditional 802.11 frequencies
Replies: 3
Views: 932

Re: Non-Traditional 802.11 frequencies

If you find some "24GHz card" you will never be able to transport signal from it to antena wthout too much loss, interference or other unwanted issues. This is why are High frequency units using converters or transponding units direct on antena. So ill go this way. Also DVB-S is using converter addi...
by karlos
Sat Feb 18, 2012 9:09 pm
Forum: RouterBOARD hardware
Topic: RB711 Problem Continued
Replies: 5
Views: 1191

Re: RB711 Problem Continued

Obviously there is some manufacturing defects on these which are termed in RMA as "DAMAGED DUE TO OVER VOLTAGE" Fine, why do you think your board is totaly death ? It isnt. It just consumes more current that your suply can give, and this is why suply think you have shorted output and it will shut i...
by karlos
Thu Feb 09, 2012 3:13 pm
Forum: Wireless Networking
Topic: Help with 11n link of 32KM
Replies: 12
Views: 2706

Re: Help with 11n link of 32KM

We had similar problem to you long time ago. The problem was very very strong signal in totaly another band (around 100MHz ant 150W as FM radio retranslation). After they instaled this monster 2m from our antenas, they all gone mad. We was not abel to connect on it from 10m distance. The cards had n...
by karlos
Thu Feb 09, 2012 3:04 pm
Forum: Wireless Networking
Topic: nv2 and kernel failure - rb433 >5.9
Replies: 4
Views: 659

Re: nv2 and kernel failure - rb433 >5.9

We use always on RB as an router and que manager, and all other on the POP are in bridge mode without any problems. The AP bridge mode looks to work fine for us already long time ago.
If your RB fails to boot, it is like your PC crushes on bios, so it cant be depending on mode in RoS it my eyes.
by karlos
Tue Feb 07, 2012 6:21 pm
Forum: Wireless Networking
Topic: nv2 and kernel failure - rb433 >5.9
Replies: 4
Views: 659

Re: nv2 and kernel failure - rb433 >5.9

Ok, its very simple. You need to upgrade your RBs firmware, not just ROS. install some new version like 5.4 this looks to work well on every old RB, and click on "System/Routerboard" and than click on button "upgrade" reboot and look what has been changed, or you can use console system routerboard p...
by karlos
Mon Feb 06, 2012 3:07 pm
Forum: General
Topic: Upgrade en bloc
Replies: 2
Views: 470

Re: Upgrade en bloc

Thank you normis for your guide. We wanted to avoid loging on each deployed single unit , and doing it per hand. We are using MK for long time, and had no need to upgrade each RB since V5. Now the scripting is changed, we need support for 802.11n cards etc.. so it is time to upgrade all the devices ...
by karlos
Sun Feb 05, 2012 10:20 am
Forum: General
Topic: Upgrade en bloc
Replies: 2
Views: 470

Upgrade en bloc

Is there some way ho to upgrade more RBs ? I can upgrade relativly easy rOS using DUde, but i didnt find how to upgrade Bootloader, set "Neighborow discover" or Datarates to "Advanced". There are some more parameters like Wireless Protocol that is almos alwyas after upgrade at status "unspecified". ...
by karlos
Thu Jan 26, 2012 11:45 am
Forum: Beginner Basics
Topic: Migrating from Old 2.7.14 Os to Routerboard 750GL
Replies: 4
Views: 1100

Re: Migrating from Old 2.7.14 Os to Routerboard 750GL

2 normis: OK, my idea was to upgrade the old ROS to newest and do easy transfer of configuration, may be using Export compact (new in v5.12)

2 juanbe: Wish you good luck
by karlos
Tue Jan 24, 2012 5:24 pm
Forum: Beginner Basics
Topic: Migrating from Old 2.7.14 Os to Routerboard 750GL
Replies: 4
Views: 1100

Re: Migrating from Old 2.7.14 Os to Routerboard 750GL

If i have some old ROS version (last i made was 2.9.23) that does not allow me to upgrade using winbox and just puting in 2.9.51 and is talking about "upgradeable until" an some past date, i go this way: Its impossible to do it remotly but. Connect to it using Serial and Telnet. Set booting from net...
by karlos
Wed Jan 11, 2012 5:06 pm
Forum: General
Topic: > 254 IPs
Replies: 3
Views: 3541

Re: > 254 IPs

/30 = 4IP /29 = 8IP /28 = 16IP /27 = 32IP /26 = 64IP /25 = 128IP /24 = 256IP /23 = 512IP /22 = 1024IP /21 = 2048IP /20 = 4096IP .... but you cant use the borders so 0 and 255 are not ussable. so always minus 2 so 192.168.0.1/23 will give you space for clients from 192.168.0.2 to 192.168.1.254 (192.1...
by karlos
Wed Jan 04, 2012 9:15 am
Forum: Beginner Basics
Topic: HOW-TO: FUP on Mikrotik
Replies: 3
Views: 3071

Re: HOW-TO: FUP on Mikrotik

Quote from MT Wiki: burst-time (TIME/TIME) : period of time, in seconds, over which the average upload/download data rate is calculated. (This is NOT the time of actual burst) You simply misunderstood the meaning of this parameter. HTH, Ohh, my shame. So the average datarate is an calculated parame...
by karlos
Tue Jan 03, 2012 4:49 pm
Forum: Beginner Basics
Topic: HOW-TO: FUP on Mikrotik
Replies: 3
Views: 3071

HOW-TO: FUP on Mikrotik

We found the probably best way how to schape clients after long searching and we think the right metod is using Burst. I think this metod was originaly not for the limitation, but in oposite to give "more" than normaly. We use it this way: An client should have connection speed 12/5Mbit, but in agre...
by karlos
Mon Dec 26, 2011 9:13 pm
Forum: General
Topic: Slow Btest on Gigabit Routers
Replies: 11
Views: 12685

Re: Slow Btest on Gigabit Routers

Nobody said that this Hardware is capable to run at this speed. It has just Gbit interface, but it is not able to handle data at this speed.
by karlos
Wed Dec 21, 2011 1:52 pm
Forum: General
Topic: NOT TO DO. Weird instalations?
Replies: 380
Views: 236254

Re: NOT TO DO. Weird instalations?

This is how somebody solves lan network. I was totaly laughed out after seeing this "stand" for plastic china switch hanging on short cables.

So we have been asked to do it right after this Jungle.
by karlos
Sun Dec 18, 2011 7:15 pm
Forum: General
Topic: ROUTER HAS NO SOFTWARE KEY
Replies: 2
Views: 2485

Re: ROUTER HAS NO SOFTWARE KEY

by karlos
Sun Dec 18, 2011 7:13 pm
Forum: Wireless Networking
Topic: what is the height required for 300km link?
Replies: 8
Views: 1329

Re: what is the height required for 300km link?

+add some cca 100m for the Fresnel zone
by karlos
Sun Dec 18, 2011 9:56 am
Forum: General
Topic: Lost my licence!
Replies: 5
Views: 1860

Re: Lost my licence!

Thanks
by karlos
Sat Dec 17, 2011 9:50 pm
Forum: General
Topic: Lost my licence!
Replies: 5
Views: 1860

Re: Lost my licence!

Thank click on the "karma" please
by karlos
Sat Dec 17, 2011 9:44 pm
Forum: General
Topic: NOT TO DO. Weird instalations?
Replies: 380
Views: 236254

Re: NOT TO DO. Weird instalations?

Our competition tells that wired network works better than wirelles :lol:

Never mind, we have now optics under earth
by karlos
Sat Dec 17, 2011 9:36 pm
Forum: General
Topic: v5.11 released
Replies: 173
Views: 44284

Re: v5.11 released

I have 2 Routerboard 1100AH upgrade to v.5.11 and every day crash
And i found new feature!

After kernel panic reboot has the RB decided to change CPUs frequency from 680MHz to 100MHz ........... very nice
It takes 6mins to reboot it to correct 680MHz frequency :?
by karlos
Sat Dec 17, 2011 9:31 pm
Forum: General
Topic: Lost my licence!
Replies: 5
Views: 1860

Re: Lost my licence!

And you dont have saved licence ? Failed RB133c upgrade ? OK the problem is with with ROS 5.8 and higher. If you want to upgrade to this version you need to watch on RB´s Firmware on old pieces like 112,133,511 and 532 shortly mipsle. If you have very very old Firmware your MK will not be able to bo...
by karlos
Sun Dec 11, 2011 3:14 pm
Forum: Wireless Networking
Topic: Surge protector for the RB4xx series...
Replies: 5
Views: 1339

Re: Surge protector for the RB4xx series...

I dont know if you have serious problems with lightening overvoltage or not. We found that most lightning protection devices will work as an protection against health damage on persons, but will not help to save the devices at all, but we still use them on reasonable places . Mikrotik has starter to...
by karlos
Sat Dec 10, 2011 7:00 pm
Forum: General
Topic: NOT TO DO. Weird instalations?
Replies: 380
Views: 236254

Re: NOT TO DO. Weird instalations?

these people never heard of rain ??
Seems not.
¨
Or this is a new sealing technique.

"What will get in, let go out" = hole on top is balanced with hole on bottom :lol:
by karlos
Tue Jun 21, 2011 11:07 am
Forum: Wireless Networking
Topic: 802.11N comparation
Replies: 15
Views: 2024

Re: 802.11N comparation

This topic is talking ebout difference between real troughput using chan0 or chain0+1. I was already talking with Microtiks representatives about big difference between BTest on Wireless cards, and the real troughput. So again: 40MHz - chain0 BTest Ncard - Ncard BTest i get 127Mbit UDP 40MHz - chain...
by karlos
Mon Jun 20, 2011 2:55 pm
Forum: Wireless Networking
Topic: 802.11N comparation
Replies: 15
Views: 2024

Re: 802.11N comparation

I am talking about actual. I don't go by over the air rates.
Actual what? Actual BTest on Mikrotik or real data download using this link ?
How you achieve 150Mbit on 100Mbit ETH interface ?
by karlos
Sun Jun 19, 2011 7:31 pm
Forum: Wireless Networking
Topic: 802.11N comparation
Replies: 15
Views: 2024

Re: 802.11N comparation

2 Dallas: You are still talking about theretical troughput readed from some testengine. Try to download some real files trough this link. You will see the difference.
by karlos
Fri Jun 10, 2011 9:46 am
Forum: Wireless Networking
Topic: 802.11N comparation
Replies: 15
Views: 2024

Re: 802.11N comparation

2 dallas: And how do you test it ? If you use the BTest on Mikrotik 2 Mikrotik makes 120MBit udp simplex on single chain on my setup - this is irelevant. If i use BTest on dual chain it makes over 240Mbit siplex or 117Mbit duplex but again UDP BTest is irelevant. The troughput is different from this.
by karlos
Thu Jun 09, 2011 9:55 am
Forum: Wireless Networking
Topic: 802.11N comparation
Replies: 15
Views: 2024

Re: 802.11N comparation

Used antenas http://en.jirous.com/anteny-5ghz/jrc-24-duplex Technical parameters Frequency range 5,45 - 5,9 GHz Gain 23,6 ±0,6dBi VSWR ≤ 1,5 Isolation between connectors 53dB (≥50dB) Front to back ratio ≥ 38 dB Beamwith-3 dB 9° Connector N - Female - JRC-24DuplEX R-SMA - JRC-24DuplEX-SMA Polarizatio...
by karlos
Mon Jun 06, 2011 3:57 pm
Forum: RouterBOARD hardware
Topic: RB600 and power options voltage level
Replies: 2
Views: 647

Re: RB600 and power options voltage level

If we need to run RB600 or RB800 on lower voltage that suports on poe, we use pasive poe splitter. Easy way. But if i can advise you, ill not use so low voltage, better you use 2x12V becuase you have lower curent and more room over the lowest possible voltage.
by karlos
Mon Jun 06, 2011 3:23 pm
Forum: Wireless Networking
Topic: 802.11N comparation
Replies: 15
Views: 2024

802.11N comparation

Hi, i am very long time trying to get best from new 802.11n technology using Mikrotik. There is very noticeable improvement in version 5.4 generaly. It looks like it has better CCQ and holds higher data rates. Looks like it better understands what other site sends. Using 2x433AH + R52Ncards + very p...
by karlos
Tue Mar 29, 2011 11:44 am
Forum: Wireless Networking
Topic: Calculate max wireless distance.
Replies: 51
Views: 10368

Re: Calculate max wireless distance.

on 6km link using R52 cards and 23dBi antenas ? i would expect -63dB signal level So if you have so low signal, ill ask why ? Are the antenas usable for this 5180MHz band ? Did you tryed another cards (another R52) or another type of antenas? If everything is OK the calculations are very accurate, n...
by karlos
Thu Feb 24, 2011 2:23 pm
Forum: Wireless Networking
Topic: Test / Real Troughput 802.11a / nv2
Replies: 10
Views: 2030

Re: Test / Real Troughput 802.11a / nv2

REPLY was fast: <support@mikrotik.com>: host mailgw.mikrotik.com[159.148.147.199] said: 550-sender IP address 213.180.51.194 is locally blacklisted here. If you think 550 this is wrong, get in touch with postmaster (in reply to RCPT TO command) Why do you blaclist our mailserver ? we received loads...
by karlos
Thu Feb 24, 2011 11:20 am
Forum: Wireless Networking
Topic: Test / Real Troughput 802.11a / nv2
Replies: 10
Views: 2030

Re: Test / Real Troughput 802.11a / nv2

REPLY was fast:

<support@mikrotik.com>: host mailgw.mikrotik.com[159.148.147.199] said:
550-sender IP address 213.180.51.194 is locally blacklisted here. If you
think 550 this is wrong, get in touch with postmaster (in reply to RCPT TO
command)


Why do you blaclist our mailserver ?
by karlos
Wed Feb 23, 2011 10:25 pm
Forum: Wireless Networking
Topic: Test / Real Troughput 802.11a / nv2
Replies: 10
Views: 2030

Re: Test / Real Troughput 802.11a / nv2

mail sent

Thank you, and looking forward about your analysis.

BTW: 2x 433AH + 52N cards in 20MHz with and working excelent , over 100 clients simple qued clients and up to 25Mbit going trough it without any trouble.
by karlos
Tue Feb 22, 2011 10:05 am
Forum: Wireless Networking
Topic: Test / Real Troughput 802.11a / nv2
Replies: 10
Views: 2030

Re: Test / Real Troughput 802.11a / nv2

Thank you, but your answer didnt help me in any way. I am testing it this way: Internet - BGP router - OSPF router - Vlan switch - Mikrotik AP - Client AP - switch - My Computer Lets throw away the RBTest and simplify my question: Why is nv2 slover than 802.11 protocol ? Same hardware, same time, sa...
by karlos
Mon Feb 21, 2011 6:06 pm
Forum: Wireless Networking
Topic: Test / Real Troughput 802.11a / nv2
Replies: 10
Views: 2030

Re: Test / Real Troughput 802.11a / nv2

"Link tests" are done on RB itselfs using BTest Server / Bandwith test and UDP "Real life test" are done like troughput traffic from our web servers to my personal computer using single or multitask downloads from FTP or WWW sever. Ok i made some actual tests from outside of the link, so i cant give...
by karlos
Mon Feb 21, 2011 10:41 am
Forum: Wireless Networking
Topic: SXT Polarization
Replies: 10
Views: 4933

Re: SXT Polarization

Thank you for answer. Why does it work on combination of R52card and R52N card using chain1, and does not on two R52N cards using standart 802.11a modulation? My idea was that the chain0 is like leading or controling and the chain1 is something like follow-up information for room multiplex and more ...
by karlos
Mon Feb 21, 2011 10:26 am
Forum: Wireless Networking
Topic: Test / Real Troughput 802.11a / nv2
Replies: 10
Views: 2030

Test / Real Troughput 802.11a / nv2

Next test in real world. I have private link on RB333 and R52 cards using AP/Client mode. Signal -54 to 50dB , 93-95% CCQ, 60-80% CPU load Testing two modes> 1) 802.11a wirelless protocol any 40MHz modulation Testing link on UDP it shows simplex 42Mbit stable performance Real life troughput 36-38Mbi...
by karlos
Mon Feb 21, 2011 10:14 am
Forum: Wireless Networking
Topic: SXT Polarization
Replies: 10
Views: 4933

Re: SXT Polarization

Normis Are you sure ? We had an migration issue on 52=>52N link Originaly: (AP side) RB133 + R52 <--> RB433AH + R52 (Cleint side) modulation 20MHz 802.11a upgraded to 5.0rc7 - result OK Than upgraded card on cleint side (AP side) RB133 + R52 <--> RB433AH + R52N (Cleint side) modulation 20MHz 802.11a...
by karlos
Fri Jan 28, 2011 10:21 pm
Forum: Wireless Networking
Topic: SXT testing results
Replies: 34
Views: 8759

Re: SXT testing results

Good result. How far it was ? Signal levels ? Configuration ? 2chain or 1chain , 20 or 40Mhz width ? Its would be first time for me to see 2chain stable link. May be we are doing something wrong, but using 1 chain we got always very nice stable links on 20MHz od 40Mbjt channel, but something is alwa...
by karlos
Fri Jan 28, 2011 10:16 pm
Forum: Wireless Networking
Topic: RB711 VS RB411
Replies: 16
Views: 2555

Re: RB711 VS RB411

711 has just one antena conector, 411+card can have 2outputs for bi-polar antena.
by karlos
Fri Jan 28, 2011 10:15 pm
Forum: General
Topic: v3.X uptime challenge
Replies: 55
Views: 12106

Re: v3.X uptime challenge

What about my uptime ? I am very near to end of counter now ;-)
keep an eye on it and see if the time reset after 497 days. :)

Yes, it starts from new now :D Time to upgrade from 3.0 beta to 5.0rc with Nv2
by karlos
Tue Jan 25, 2011 8:50 pm
Forum: General
Topic: v5rc7 released
Replies: 95
Views: 16311

Re: v5rc7 released

http://demo2.mt.lv/ has RC8

Can't wait! :D

HAHA

http://demo2.mt.lv/cfg?page=registration_table

wlan2-ap2 00:0C:42:05:03:48 no -60 9.0Mbps copy to access list

Like on our MTics, we also have low modulation even on strong signal levels when without traffic
by karlos
Tue Jan 25, 2011 9:19 am
Forum: General
Topic: v3.X uptime challenge
Replies: 55
Views: 12106

Re: v3.X uptime challenge

One more time, before end of counter ?

What was the price for the Winner ? 8)
by karlos
Sun Jan 23, 2011 11:39 am
Forum: Wireless Networking
Topic: 7km wireless link @5.8ghz R52H+27dbi ant vs R52+30dbi ant
Replies: 13
Views: 2419

Re: 7km wireless link @5.8ghz R52H+27dbi ant vs R52+30dbi an

I choosed the Rb411 + R52 + 30dbi grid antenna combo Today the link was up, and with hours of configuration I only can get max 5mbps throughput. What card should I try next, r52h/r52hn/xr5 ? any advices appreciated. thanks. You think BIGER is BETTER? You cant solve your ignorance with bigger antena...
by karlos
Sun Jan 23, 2011 11:24 am
Forum: Wireless Networking
Topic: NV2 Real life PTMP migration and stability
Replies: 162
Views: 38633

Re: NV2 Real life PTMP migration and stability

Can't help you much then, NV2 package does some strange stuff with signal levels and noise levels when you have a value entered into the noise floor threshold. The other thing I notice about the NV2 package is that at idle the CCQ will show a very low number even in the teens and once you start mov...
by karlos
Sun Jan 23, 2011 11:01 am
Forum: General
Topic: v3.X uptime challenge
Replies: 55
Views: 12106

Re: v3.X uptime challenge

What about my uptime ? I am very near to end of counter now ;-)