Building a full duplex link.

RouterOS General
1

I’m currently in the process of getting the equipment together to build a full duplex link. R52H cards should do the job. My question, should I use the RB-433 board or the RB-800 board or some other RB? What advantage is one over the other? Are the R52H cards ok?

Thanks,
Larry

2

Have you looked into the R52Hn? Full duplex in one radio. AND mmcx connectors! :smiley:

3

Yes, I have got some on the way.

Thanks.

4

wrong :laughing:
you should be shame; no single radio card is full duplex

5

Yes, I know one card does not do it all. I’m more interested in which routerboard to use. I would prefer to use the rb-433 cards, but would it be better to use the rb-800 and why?

6

I don’t know…what does this look like to you?
http://www.mikrotik.com/wireless.php#nstrm

Maybe I am wrong, but there are two MMCX connectors on a R52Hn, one for transmit, one for receive. You can use it single channel also from what I understand.

7

FCC and CE approval
MikroTik introduces the R52Hn wireless 802.11a+b+g+n miniPCI card for multiband high speed applications, with up to 350mW output power. It works on 2.192-2.539 and 4.920-6.100GHz frequency range and supports Turbo mode for faster transfers. The card performs best when coupled with the MikroTik RouterOS. R52Hn is optimized to work with MikroTik Nstreme protocol to reach extra long distances at a great speed. The Nstreme protocol is MikroTik proprietary wireless protocol created to overcome speed and distance limitations of IEEE 802.11 standards and to extend point-to-point and point-to-multi point wireless link performance. The new Nstreme-dual protocol designed to provide real full-duplex communications over wireless with a pair of wireless cards – one for transmitting data and one for receiving.

This is what they say. Last sentence says it all.

8

That is the same marketing hype that they have been laying out for the R52 and R52H and all other MT branded radio cards. I think the confusion comes from using Nstream and Nstream-dual in the same blurb.

Nstream is a protocol that is quite useful to improve performance by combining data packets in a single radio packet to improve total throughput. It also extends the ack for longer links.

Nstream2 aka Nstream-dual uses two radios at each end of a PtP link (4 total) to create a full duplex link. Personally I think they should have named this something else to avoid the confusion with Nstream.

And now they have added the new protocol Nv2 which I really hope does not stand for Nstream version 2.

Tom

9

Hi Tom! If it is not full duplex, how can it transmit with two powerful PAs concurrently? Normis says it can.
http://forum.mikrotik.com/t/hot-new-mikrotik-radio-card-r52hn/34698/1
Maybe normis was incorrect? The data sheet seems to back him up. 7 watts is a LOT for one radio.

10

Full duplex doesn’t transmit with 2 radios, it uses one radio to transmit and one to receive. Full duplex indicates bidirectional data transmission is possible AT ALL TIMES.

11

The R52Hn is not full duplex (verified by Mikrotik support). If you want full duplex, it takes two. At 7 watts each for half-duplex, I’ll stay with the R52H. :frowning:

12

for that configuration i recommend you to use rb433ah boards, they have better performance cpu… when i’ve used just rb433 with two r52nM card it was rebooting somtimes… so use 433ah…

13

:sunglasses: Great input. I will be using the R52H cards and 433ah boards and see what happens. Keep the input coming. Thanks.

14

only in german :slight_smile:

http://wiki.meconet.de/doku.php/mikrotik/ros/full-duplex_punkt-zu-punkt_auf_layer2
http://wiki.meconet.de/doku.php/mikrotik/ros/full-duplex_punkt-zu-punkt_auf_layer3

15

Can the last post be converted to english please…