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roland
newbie
Topic Author
Posts: 43
Joined: Sat Jan 22, 2005 12:03 pm
Location: Thailand

RB230: Prism PCMCIA vs. CM9

Thu May 04, 2006 6:44 pm

I try to figure out if a Prism 2.5 PCMCIA (300mW) performs better than a CM9 (65mW).
It sounds obvious, but somehow it isn't. A link with a Prism on one site and a CM9 on another gives me better results then Prism on both ends.
(both link-samples are obviously 802.11b not 11g). And I just don't understand why. Are there issues with the PCMCIA cards?

Now I start thinking about replacing the RB230 with Prism PCMCIA cards by RB500 with CM9 or SR2.
[FYI, using 2.9.23] Anyone?
 
jober
Long time Member
Long time Member
Posts: 692
Joined: Fri May 28, 2004 12:16 pm
Location: Louisiana,USA

Thu May 04, 2006 7:01 pm

I have found that the prism cards have a bit more noise then the cm9. But with the two PCMCIA slots I tryed out the SRC cards and found them to work better then the 300mW prism cards or the CM9s and they seem to work better with the newer atheros cards that I am now using in all my RB CPEs.
I still have a few prism cards left on a tower but I will be upgrading them to the SRC cards. But if I have the money I may just go with a new RB532 with the NMP-8602 so that I can start testing the 5 and 10 Mhz channels.
The SRCs are working very well on the other APs so as soon as I have time I will replace the last few prisms.
The SRC is a PCMCIA card from Ubiquiti and it has 300mW in B/G mode but only 100mW in A.
I have clients connecting with DLB-2300s, RB112/rb532 w/SR2 and CB3s on the rb230APs that have the SRC cards.
 
roland
newbie
Topic Author
Posts: 43
Joined: Sat Jan 22, 2005 12:03 pm
Location: Thailand

Thu May 04, 2006 8:00 pm

The SRCs are working very well on the other APs so as soon as I have time I will replace the last few prisms.
The SRC is a PCMCIA card from Ubiquiti and it has 300mW in B/G mode but only 100mW in A.
I might replace the Prism with the SRC, if I can get them somewhere...
In our location, we are fixed on 2.4G (b/g) due to regulation.
Also, I need a PCMCIA because we have quit a few RB230 which have space for only 1 miniPCI. And of corse a new card is cheaper then a new router. :roll:
 
User avatar
djape
Member
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Posts: 469
Joined: Sat Nov 06, 2004 7:54 pm
Location: Serbia

Sat May 06, 2006 10:50 am

CM9 works better than prism, but it's very sensitive to noise.
CM9 can process a much bigger traffic than Prism.
Then again as jober said, the best solution is to use SR2. I usually lower the tx-power of SR2 cards and they work great.
You can always order SR2 on the net so supplier can send them via DHL or TNT.
Cheers...
I drink like a pirate and smoke like a hippie...

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