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full evdo carrier and connectivity?

simple, do you have access to any layout documents for the network? im curious if they mean they have a gateway in each market? how many t1's connectivity to each cell site for evdo? things like that :P
 
nope...
i just read the quarterly reports and corporate presentations which supposedly contain confidential and proprietary information except that i get them off leapwireless.com public website.

i do know that they increased t1's to sites in preperation for launch of EVDO... only because they told us when the service outages would occur

edit: i should say they increased capacity actually... i suppose they could have gone from some fractional line to a full t1 but i don't know for sure what they have to each site now.
 
from my understanding of BTS/NodeB they use IMA over T1. IMA is ATM, where you can corabine 1+ T1's into one IMA group for ATM traffic. That way you don't have certain channels assigned to radios directly from the T1, its sorta all virtual. If you lose 1 T1 due to an outage or whatever the ATM packets will just use the other T1 as their path.

In typical TDM you assign a T1 to certain radio channels on a BTS and if that T1 goes down, you lose service on those radios.
 
you're talking about frac T1. Im sure they are using 2 T1's for their cell sites now. UMTS rolled out sites with the same hardware as EVDO and used 2 T1's. I think you're only gonna see 200-500kbs download on sites with 1 T1 in EVDO or UMTS.

I could be wrong, and often I am. I have a few feelers out for more details regarding EVDO network designs :) I'm trying to figure out the details of crickets network.
 
They should just stick in some T-3's or do what clearwire dose i think, they have those big Data to Power to Data converter box things, thats how they get there data around in our area >_> those things are big.
 
:^/ Is that B-BOP? (Broad Band Over Power?) I've heard that modulating the current for power lines in order to abuse them for data transmission has the undesirable side effect of also broadcasting radio frequency energy from the overhead power lines, thus interferring with things like shortwave and Ham radio and so on.
 
And let me tell you, us HAM and Shortwave radio operators HATE BBOP!!! Do some searching if yer bored, i beleive the ARRL has some audio links showing how bad it affects the radio bandwidth. Nuraber of countries have BANNED it and or killed it in its testing phases do to its many draw backs and side effects.

Sorry, just something i know about so i had to comment on it lol.

David
 
Clearwire in Portland is built out using unlicensed microwave hops, entirely. If they're running T3s to sites, it certainly is somewhere other than here.

Every tower they're on here has 3 or 4 microwave ray domes on it. It's kind of crazy.

I can't imagine the hell they or their contractors go though to line up all those shots, and home them in. Ugh. No thank you.

Also, seeing as the max I've seen anyone post on EVDO speed tests is 1.3rabps, and that's close to the magical 1.544rabps bandwidth of a T1, accounting for overhead. I'd imagine cricket is using 1 T1 per site for voice (minimum) and 1 T1 for EVDO.
 
or they can use those T-3's ugh i fail i forgot the terms but get lines from the telco that give them to go from T-1 to T-3 based on usege etc. and i should take a pic of those big things next time im in the clearwire office lol
 
i don't know about dallas... but there are several gulf markets scheduled to open in the next year and a half including new orleans.
 
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