"Use Interference Robustness"


macrumors 6502a
Original poster
Aug 22, 2006
Chandler, AZ/Chicago, IL
While trying to trouble shoot why my internet speed is still soooo slow i came upon this option when i clicked on my signal strength and was wondering what it is??? Again the option is called "Use Interference Robustness" What is that???:confused: :D

Fearless Leader

macrumors 68020
Mar 21, 2006
Warning gona geek out on ya.

On most devices that run on the 2.4ghz frequency they run in 8ms bursts with 8ms rest, wifi normally runs in 16ms burst and 8 or 16ms rest, i believe. When the two are running the 8ms burst of the other devices cuts out 8ms of the transmisions on the airport. the interface robustness figures out when to send out 8ms burst to not get cut out.

and yes microwaves do have to do with it. Microwave ovens your wificard, wireless router, wireless phones, all run on microwaves, just at diffrent strength.


Staff member
Jan 20, 2005
Yeah, it's supposed to provide some defense against interference from other devices. Apple has been silent on what exactly it's supposed to do, but I remember reading an article somewhere about it having to do specifically with interference from microwaves. Something about the usual techniques used to reduce interference actually causing increased interference due to the periodic nature of interference generated by microwaves.


macrumors 68020
Mar 11, 2005
I've always had it checked, and I think it gets me better coverage, especially with the plethora of 2.4 GHz phones surrounding me.


Moderator emeritus
Apr 27, 2005
San Francisco, CA
Does it make a difference where you check interference robustness? There is the option on the computer (under the airport menu) and the option on any apple base station (in the Airport Admin Utility). Should both be checked? Does it matter?

What if you don't have a Apple base station, does it make any difference checking it on your computer?

Fearless Leader

macrumors 68020
Mar 21, 2006
only use it if you have alot of interferance. When it shortens its burst period it also lowers the speed, makes it a bit slower. Apple and apple hardware would be ideal, but alot of hardware supports it, they just automaticly select it instead of an option.