Well, today, I drove by St. Joseph's Hospital here in Tampa, FL, and my RangeLan 4700 card associated at 1.6Mb!

I need to see if anything is "available" but I am guessing that FH owners are probably going to have less secure LANs since they think that FH is "untouchable".

Tron Of Borg; D.S., F.H.

(LOL)

Did you use Netstumbler with your card?

DSLBiker

Just to prove my own stupidity...

whats a rangelan card ?

- Thanks

I actually didn't use any stumbling type software.

The other day, I was driving by the hospital and I simply connected at 1.6Mb. I noticed because the little balloon popped up stating this.

I went back today and I used the RangeLAN survey util to see what it would do. It did a search of "domains" (just numbers to me...probably channels) and found the MASTER (ap?).

I have some pics that I'll try to U/L later. I did stop one step shy of connecting and peeking on their domain. There is a button that you can press once you find the "master" that says "connect to this domain" (or something like that). Since this is a hospital, I'm weary of poking around too much.

Anyone need an operation?

Dr. Tron Of Borg, DS. FH.

It is a card by Proxim/Intersil. The one I have is a 7400 series and it is a Frequency Hopping (FH) card. NS uses DS cards.

Tron Of Borg

...that FH is not secure after all!

LMFHAO <laughing my Frequency Hopping a$$ off>

Well, I'm going to hop on out of here.

Tron Of Borg

I think it's amazing how many medical facilities are open. I'd say that of any specific industry that one seems to pop up more often than any other. With HIPAA regulations and penalties, I would think that somebody's gonna be getting some pretty steep fines one the regulators figure this out.

The FH sites aren't quite as east to spot since there's not the plethora of detection tools for them but they are out there.

The proxim setup has been around for years now. yes it is FH but it is not 802.11b FH which is different. the 7400 /7200 units are 802.11WLF cards or "openair" they have been around since 1994/5. they were the bee's knees for some time until 802.11b came out. it was just to slow. but 11b FHSS is and will be 2mb to 10mb.

dont get the two mixed up if you are buying them.

Isn't 802.11b DS ONLY?

The 802.11b standard addressed both direct sequence and frequency hopping technologies, although the FH seems to have been bypassed as the technology of choice. From the name associations that were turned up, I'ld say it was an Intermec-based system that was found (they use the Proxim cards and also the MASTER nomenclature for their access points).


fitzStewart

The 802.11 standard allows for two types of transmission, Frequency Hopping Spread Spectrum (FHSS) & Direct Sequence Spread Spectrum (DSSS)

The 802.11b standard only permits DSSS. 802.11b compliant product will interoperate with the older 802.11 1Mb & 2Mb DSSS product.

The IEEE 802.11b extension employs a modulation scheme called complementary code keying (CCK) and operates in the 2.4 GHz ISM band.
Data rates of 1 to 2 Mbps for FHSS and 1 to 11 Mbps for DSSS
The MAC uses the CSMA/CA technique.
The WECA (Wireless Ethernet Compatibility Alliance) consortium supports this 2.4 GHz DSSS technology. Products that pass the WECA test are stamped with a WECA seal of approval, called "WiFi" (pronounced Y-Phi) for "wireless fidelity".
The WECA stamp helps consumers identify products that are interoperable..

802.11b DSSS
Direct sequence is a more advanced, more recognized and more used form of SS today. The DSSS process is performed by effectively multiplying a RF carrier and a pseudo-noise (PN) digital signal.
A chipping code is assigned to represent logic "1" and "0" data bits. As the data stream is transmitted, it is actually the corresponding code that is sent. A 10-chip code word for each "1" data bit is used. A similar but inverted 10-chip code word is used for the "0" data bit.
This now is the standard for the next two years for pioneers and the next 5 years for normal businesses. 90% of wireless companies working with this as it will work at 11Mbps indoors @ < 50mtrs indoors and < 24km outdoors.
Data and VoIP friendly
Kills FHSS transmitions
Prism2 and hermes chipset
DSSS sends a specific string of bits (chipping code) for every data bit sent. DSSS generates redundant bit pattern for each bit to be transmitted. This bit pattern is called chip/chipping code (processing gain). The longer the chip, greater is the probability that the original data will be recovered, but also more bandwidth that is required for transmitting more chips. If one or more bits are damaged during transmission, statistical techniques embedded in the radio can recover the original data without the need for retransmission. The unintended receivers view DSSS as a low-power wideband noise and is ignored or rejected by most narrowband receivers.


802.11b FHSS

In FHSS, a data signal is modulated with a narrowband carrier signal that hops from frequency-to frequency as a function of time over a wide band of frequencies.

The hopping code determines the frequencies the radio will transmit on and in what order.
A frequency hopping radio will hop the carrier frequency over the 2.4 GHz frequency band between 2.4 GHz and 2.483 GHz.
FH can achieve up to 2 Mbps data rates and faster data rates are susceptible to an increased number of errors.
Interferes with and kills DSSS
Good for data and VoIP with one radio
Soon to dye out Due to the lack of companies using it. They will not go for the enterprise networking but for home use.