MikroTik

Whenever I select one of the odd ones aside from eC or Ce, it says its not supported. What are they, wider channels? Exentions for use only with 802.11ac cards???? Anyone know?

Yes

C is 20MHz contol channel. In 11n you have Ce and eC with 40MHz. In .ac channels can be wider.

Could someone please post the descriptions of each one of these. I can't find a cheat sheet.

Also if someone could reveal a mini-pci car for 802.11ac that will work with routerboard it'd be appreciated.

As far as I know there is no 802.11ac product for RouterBoards. The "eeeC", etc. channels are simply support in RouterOS for future 802.11ac products.
In 802.11n mode:

eC = 20/40MHz-ht-below
Ce = 20/40MHz-ht-above

You can see why they needed to rename the values otherwise they'd look a bit like this:

20/40/80MHz-ht-some-above-and-some-below!!

That makes sense. The AP rolls back to 20MHz for compatibility, right?

That makes sense. The AP rolls back to 20MHz for compatibility, right?

Yes. To the "C"-Channel.

What about (Ce | Ceee | eC | eCee | eeCe | eeeC ) ???

eC mean Extend Channel below : 20Mhz?
eCee mean Extend Extend Channel below : 40Mhz?
eeCe mean Extend Channel below : 80Mhz?
eeeC mean Extend Channel below : 160Mhz?

or how?

and why Ce and Ceee but there is no Cee ?

C- is center of frequency
e - is extension channel


example : frequency is 5100 and in eCee will be see (5080-e,5100-C,5120-e,5140-e)

i have as of now good speeds on the new SXTac using NSTREME...

shifting to NV2 is really bothersome...

thank you mishaM , very good explication.

What about (Ce | Ceee | eC | eCee | eeCe | eeeC ) ???

eC mean Extend Channel below : 20Mhz?
eCee mean Extend Extend Channel below : 40Mhz?
eeCe mean Extend Channel below : 80Mhz?
eeeC mean Extend Channel below : 160Mhz?

or how?

and why Ce and Ceee but there is no Cee ?

Each letter denotes a 20MHz channel section.

C: is where the Channel's main frequency is set
e: is where the rest of the spectrum "sub-channel" is distributed

There is no "Cee" because that would equal 3x20MHz combined channels to make a 60Mhz channel, Mikrotik currently only has 20/40/80 channel width available for AC.

If the antenna is has 2 spatial streams (dual-chain) then you will see 2x 80Mhz, not 2x160Mhz, equaling the equivalent of 866Mbps link speed. Single chain (1 spatial stream) = 433Mpbs link speed.

Hope this helps!

This is helpful. What is "XXXX"?

G

Note - Below , the bolded 20 is the frequency the radio is set to.

Normal 20 MHz wide is C

C = 20 MHz wide
( Total is 20 MHz wide --- 20 )

Ce ;
C = the center 20-MHz wide frequency the radio is set to
e = an additional 20-MHz wide frequency that starts above where C stops.
( Total is 40 MHz wide --- 20 + 20 )

Ceee ;
C = the center 20-MHz wide frequency the radio is set to
e = an additional 20-MHz wide frequency that starts above where C stops
e = an additional 20-MHz wide frequency that starts above where e above stops
e = an additional 20-MHz wide frequency that starts above where e above stops
( Total is 80 MHz wide -- 20 + 20 + 20 + 20 )


eC ;
e = an additional 20-MHz wide frequency that starts lower than where C begins.
C = the center 20-MHz wide frequency the radio is set to
( Total is 40 MHz wide -- 20 + 20 )

eeeC ;
e = an additional 20-MHz wide frequency that starts lower than where e below begins.
e = an additional 20-MHz wide frequency that starts lower than where e below begins.
e = an additional 20-MHz wide frequency that starts lower than where C begins.
C = the center 20-MHz wide frequency the radio is set to
( Total is 80 MHz wide -- 20 + 20 + 20 + 20 )

eCee ;
e = an additional 20-MHz wide frequency that starts lower than where C begins.
C = the center 20-MHz wide frequency the radio is set to
e = an additional 20-MHz wide frequency that starts above where C stops
e = an additional 20-MHz wide frequency that starts above where e above stops
( Total is 80 MHz wide -- 20 + 20 + 20 + 20 )

Info
If we have a 20 MHz wide channel setting at a frequency of 5500 ,
The frequency use begins at ( 5500 - 10 ) = 5490
The frequency use ends at ( 5500 + 10 ) = 5510

If we have a Ce (40 MHz wide) channel setting at a frequency of 5500 ,
The C frequency use begins at ( 5500 - 10 ) = 5490
The C frequency use ends at ( 5500 + 10 ) = 5510
The e frequency use begins at ( 5500 + 10 ) = 5510
The e frequency use ends at ( 5500 + 10 + 20) = 5530

North Idaho Tom Jones

Of special note:

If you have a eCee configured AP

A eC client should get an eC connection

A Ce client should get a Ce connection

A Ceee client should get a Cee connection

A eeeC client should get a eC connection

A normal C ( 20-MHz ) client should get a ( 20-MHz ) C connection


If I am correct - A XXXX client will auto connect and get the widest possible connection.

A XXXX client connected to a normal 20-MHz C AP should get a 20 MHz wide connection

A XXXX client connected to a Ce or eC AP should get a 40 MHz wide connection

A XXXX client connected to a Ceee or eCee or eeCe or eeeC ap should get a 80 MHz wide connection.


Note - the above connection channel widths are based on good/clean/clear frequencies.
If you have a XXXX client or a Ceee clinet -and- a Ceee AP , but the e frequencies busy and congested , you may only get and maintain 20 MHz wide connection.
If the center band C frequency is busy and congested , then no clients might be able to connected ( C busy and all e frequencies quiet ).

So , when you configure a Ce, Ceee, eC or eeeC AP , the C frequency range on your AP is the most important clean frequency to get client connection.

Excellent info. I understand all of this. Thanks for the response.