On 18 Feb, 16:05, Jeff Liebermann <j...@comix.santa-cruz.ca.us> wrote:
> d...@94.usenet.us.com hath wroth:
>
> >tightgu...@yahoo.co.uk wrote:
> >> I just bought a Belkin Wireless Laptop Network Card Adapter - 54g.for
> >> my laptop and now want to buy a Belkin ADSL Modem with Wireless G
> >> Router I see there is a few on eBay with 125g on the box. Would this
> >> still be compatible or would I have to buy the one with 54g. Not
> >> knowing much about it I suppose I would not benefit the extra speed if
> >> I only have a 54g on the laptop would this be right?
>
> >The basic, compatible, rate is the 54g. You would be able to use 54g in
> >this mixed environment.
>
> Yep. Agreed. Faster than 125Mbits/sec is not mentioned in the
> IEEE-802.11g standard and is deemed "proprietary".
>
> >Because the "extra" rates are vendor-specific, you would have to have a
> >card from the same vendor as the router to take advantage of the
> >non-standard rate. That might include two vendors that use the same
> >chipset, or whose products are actually made by the same company.
>
> I usually just turn those modes off even if they are compatible. The
> problem is that the card spends an inordinant amount of time switching
> in and out of these advanced modes trying to squeeze every last bit of
> thruput out of the system. Besides, they only work for fairly short
> ranges and then only if there is no interference.
>
> >I once had a problem with an SMC "22Mbps" card that would not connect for
> >more than a minute with a Netgear 54g. I had to disable the non-standard
> >"Turbo" implementation in the SMC card, so it could connect at 11b. I
> >haven't seen anyone else mention that sort of incompatibility.
>
> Different proprietary standard. 22Mbits/sec is Texas Instruments
> implimentation of PBCC (Packet Binary Convolutional Code) which was an
> optional alternative to OFDM protocols included in IEEE 802.11g-2003
> in section 19.6. It was necessary to obtain TI's vote to obtain
> approve 802.11g-2003. There's also a PBCC 33Mbits/sec mode which I
> haven't seen implimented.
>
> Products which use the TI ACX1000 chipset have this mode.
> Unfortunately, various implimentations (i.e. DWL-900AP+) would screw
> up 802.11b connections if the 22Mbit/sec mode was enabled. It would
> constantly try to make a faster 22Mbit/sec connection, fail, but take
> so long doing it, that the 802.11b connection would think the client
> has disconnected. It works just fine as "22Mbits/sec only" but does
> badly when mixed with 802.11b.
>
> --
> Jeff Liebermann j...@comix.santa-cruz.ca.us
> 150 Felker St #D http://www.LearnByDestroying.com
> Santa Cruz CA 95060http://802.11junk.com
> Skype: JeffLiebermann AE6KS 831-336-2558
Excellent I changed it to the 125g card paid a bit more. May I say
guys thanks all for the speedy/helpfull info
Tracey