Hi there
this is my first post to this list, so please be gentle
I dig all the list archives and didn't find any thread on this
subject. My question is how TC would behave on a 70km
link, because 802.11b has timing issues that limit it
to about 35km (*)
Does any of you have a working long link like this one?
My setup: two 1.5 meters solid parabolic 31dBi antennaes,
105m high on one side, 660m on the other, about 70km
between the points. each orinoco card is connected to
a pigtail and directly to each antennae cable (no cable
long runs to loose signal)
two 802.11b machines (running linux in ad-hoc mode
with orinoco cards) gave a poor throughput so I borrowed
two WP-II (PtP) and they gave a lot better throughput but
not perfect, yet, so my wonders in the use of Karlnet's TC.
I plan to test this using two RG1x00 with Satelite firmwares
in PtP mode. I'm aware that the RG1x00 will have it's
bottleneck at 3Mb max (because of lack of processor power)
but I need to convince ppl here that it works before spend
several hundred dollars on AP1000 or WPBASE+ with
2 cards (RG1x00 is cheap and easily found here in Brazil)
Any thoughts on this would be highly apreciated
Cheers
!3runo
(*) 802.11b expects that each sent packet receive its
"ack" within a certain time that, calculated based on
light speed, translates to about 35km. It's the "DTIME".
With a link longer than that, the transmitter will start
retransmitting packets which could collide with the
previous transmitted acks and so on until the link becames
nearly unusable.
|