Jmp systems Fwb2411 User manual

Internet @ Broadband Wireless

Wireless LAN Bridge FWB 2411

Guide Book

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3,4 F., Shinhwa Bldg., 1451-19, Seocho-Dong, Seocho-Ku, 137-073, Seoul, Korea

Tel : 82-2-3473-8128/38 Fax : 82-2-3473-8129 E-mail : info@jmpsystem.com

J-MAC Technology

Information Sheet

Published by JMP Systems Co., Ltd

Certified as anCertified as an

‘‘

Excellent Information TechnologyExcellent Information Technology

’’

byby

‘‘

Korean Ministry of Information and CommunicationKorean Ministry of Information and Communication

’’

88Mbps Real SpeedMbps Real Speed--Wireless BridgeWireless Bridge

((Mac Protocol Technology for Wireless LAN Bridge)Mac Protocol Technology for Wireless LAN Bridge)

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1. What is J-MAC ?

In a word, J-MAC is MAC(Media Access Control) protocol that is the most suitable

for outdoor high-speed WLAN Bridge.

2. Development History

WLAN protocol had fixed by IEEE(IEEE802.11b), and is used commonly over the

world. But, MAC protocol is not fit for 11Mbps speed which Physical Layer provides.

The main reason of speed-drop is based on that MAC technology is developed for

indoor use. That is, the MAC's algorithm is not to utilize the best speed supplied by

Physical Layer, but to manage participation and departure of notebook computer and

etc –is called 'Station' -in wireless network area. So, with the MAC protocol, fixed

WLAN bridge performs very lower speed than 11Mbps.

When 1 unit Access point transmit data, at the fastest speed, by use of FTP, to 1

WLAN Card, IP packet's transmission speed is about 4.8Mpbs(600Kbyte/sec), which

does not reach half of 11Mbps. This real speed can be easily ascertained by FTP

transmission test, which is displayed on PC monitor.

J-MAC applied WLAN bridge is not for indoor communication, but for WAN

communication -building to building, client side's facilities of ultra high-speed

internet service, etc.

J-MAC technology's first objective is to 1) realize the maximum data speed and 2) be

in pursuance of Physical Layer protocol at the same time, but MAC technology is

self-developed by JMP Systems Co., Ltd.

J-MAC technology employs two kinds of concepts simultaneously. One is polling

CCA(Channel Clear Assessment) and capture the opportunity to transmit. The other

is Fair Transmit Opportunity concept, which gives transmit opportunity to data

packet-received side fairly.

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To do so, the most important issue was the best harmony of hardware and software.

So, to come true them, the following development task had been progressed.

A. Hardware : FPGA chip, which is charge of MAC function for high speed WLAN

bridge.

B. Software : Device Driver and WLAN bridge software module, which is charge of

MAC function for high speed WLAN bridge.

C. System : Test set which above H/W and S/W are applied.

In conclusion, J-MAC technology is self-developed MAC protocol by JMP Systems

Co., Ltd., and the main objective is to improve transmission ability up to2 times than

existed WLAN system.

3. Significance of J-MAC protocol

WLAN worldwide standard, IEEE 802.11 is created through study and examination of

numbers of scholar and high technicians who work for the best technical companies.

So, IEEE 802.11 has technical profundity and without full understanding and practical

experience about IEEE 802.x -worldwide standard of WLAN technology, network

technology, Ethernet, bridge and internet protocol-it is very hard to approach to

IEEE 802.11.

The number of companies who develop IEEE 802.11b WLAN's MAC protocol is a few

in the world, and most of those companies use their firmware as it is. That is, it is

said that this field has very high technical barrier, H/W and S/W should be most

suitable harmonic.

At present, for most of WLAN products,Intersil's MAC chip and Firmware is utilized.

So, their real data speed is limited to 4.8Mbps, which is existed indoor WLAN data

speed. In conclusion, when outdoor WLAN bridge is needed, indoor-purpose AP is

used with very expensive antennas and real performance is poor.

J-MAC technology was created based on 1) full understanding about theory about

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802.11 and 2) enough experience for them. And J-MAC was also created to apply

wireless communication protocol to common-use WAN system, not LAN system.

So, the most important aim of development was improve real dataspeed epochally.

That is, J-MAC technology improved data speed up to 60% and more than by

applying our J-MAC's S/W and H/W solution to WLAN bridge.

4. Strong points of J-MAC technology

1) Improvement data speed

The strong point of 802.11x is to make it possible to buy high bandwidth wireless

product with cheap price thanks to chip mass production. But unfortunately, actual

throughput can't come up to even half than PHY's transmission performance.

The epochal protocol improving this matter, that is J-MAC technology.

2) Perfect security

•168bit encryption

•Another hardware security module

•Basically, J-MAC protocol is non-compliant with 802.11b, so it is impossible to

hack with other WLAN products.

•In case of P2MP, communication is perfectly separated on Layer 2, so hacker can't

send or receive packets without passing through latter network which ISP manages

and supervises.

3) Stability and Channel-occupancy capacity

As there are no burden on management of stations' participation and departure,

protocol is simple and stable. Moreover, wireless bridge is like backbone of wired

system, stability is very important factor.

J-MAC is designed to have excellent capacity to occupy 'idle' conditioned channel

than 802.11b type WLAN. So, without 802.11b's interference, it is possible to

communicate having priority.

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4) Flexible and quick response to customers' demands

Until now, it takes long time to stable developed MAC protocol Firmware, so it

usually takes about 1 year to commercialize after finishing development high-speed

Modem chipset.

With J-MAC technology, it is simple to use developed or developing high-speed

WLAN Modem chipset, as like 22Mbps, 54Mbps, and etc.

And it is capable to add customers' new demands anytime. As we can modify or

revise even Firmware, we can meet customers' demands.

5. Applications of J-MAC technology

The demand for ultra high-speed internet service is increasing continuously.

But wire-network construction needs so much cost investment from ISPs, and Aerial

line construction is too restrictive. So, the substitute for wired networks' these

problems is WLAN bridge, which is the most highlighted among existing solutions.

J-MAC bridge gives solution to open internet service instantly without network lead-

in construction.

Application 1. Small and Medium ISPs

Small and Medium ISPs serve internet service in limited small area, so they don't

have themselves' subscriber network, pay rental charge to big ISPs. As they

connect network to service area with JMP wireless bridge, they can serve internet

service for subscriber with just network connection cost, without expensive rental

charge.

Application 2. Big ISPs

For the areas that they have not served internet service due to economical efficiency,

as like low apartment, farming and fishing villages, big ISPs can continue to increase

subscribers by use of JMP wireless bridge, which doesn't need network lead-in

construction and is capable to open internet service instantly.

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Application 3. Overseas Area

For Africa, China, South-East Asia, and some other areas, ISPs have had difficulties

to run internet service business due to economical efficiency from 1999 to 2000.

It is very effective to use JMP wireless bridge to open internet service instantly.

Application 4. Building to building

As companies expend their business, they need additional factories or offices. But

sometimes it is impossible to expand office or factory in the existed same building.

Connection existed building's network to new building with JMP wireless bridge, it is

possible to open intranet of the company instantly without leased line.

Application 5. Hotspot service

Hotspot service is popularized areas of cafes, parks, airports,school campus, and

etc. Hotspot service utilize WLAN technology. With wired network lead-in

construction to Hotspot areas, cost and construction difficulties become issues.

To settle down these problems, it is effective to connect multi(2~10) APs to wireless

bridge and then up-link this to one E1. For this solution, wireless bridge should 1)

be non-compliant with 802.11b, 2) have wide and stable bandwidth, 3) have excellent

channel-occupancy capacity comparing with 802.11b. Therefore, JMP's J-MAC

wireless bridge is the best solution.

FWB2411

User Manual

Published by JMP Systems Co., Ltd

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1. Definition

1) Package Contents

FWB 2411 1set / Power Adapter 1EA / Console Cable 1EA

/ User Manual 1EA / CD 1EA

* Option items : Antenna

2. Package Contents

-FWB : Fixed Wireless Bridge developed by JMP Systems Co., Ltd.

-2411 : 11Mbps PHY speed at 2.4GHz

-J-MAC technology : Self-developed MAC protocol, which is core technology

of communication, overcomes 802.11b’s weakness outdoors.

(For the detail information, Refer to‘J-MAC technology Information’)

2) CD’s contents

/manual

/fwb_mon

/tftp_srv

/acrobat

/term

/mov

-Serves various kinds of documents as PDF type.

-Serves FWB2411 Monitor Program.

-TFTP Server program for Windows95/98/2000.

-Servers Acrobat Reader to read PDF files.

-Servers terminal emulation program.

-Serves movie shows installation process.

* Files and contents in CD would be changeable.

3. Dimension & Weight

FWB2411

Fixed Wireless Bridge

JMPSystems

23Cm

5Cm

16Cm

-Dimension

-Weight : 1250g

1) FWB2411 only

38.5Cm

7.0Cm

20.7Cm

-Dimension

-Weight : 1900g

2) In Box

( Including Power Adapter 1, Console Cable 1, CD 1,

Manual 1 )

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4. Parts and Functions

FWB 2411

②③④⑤⑥①

1) Front Side

①

Power LED : Indicates whether Power is ON or OFF

②

Link LED : Refer to‘Installation Manual’

③

RD LED : Indicates Wire Data-Receive situation

④

TD LED : Indicates Wire Data-Transmission situation

⑤

RX LED : Indicates Wireless Data-Receive situation

⑥

TX LED : Indicates Wireless Data-Transmission situation

① ③ ④②

①

ANT : Port to connect Antenna.

②

Ethernet : Port to connect Ethernet RJ-45.

③

RS-232C : Port to connect Console 9-pin Male Serial cable

④

Power : Port to connect DC 5V adapter.

●

Reset Switch : Bottom side of FWB2411

2) Back Side

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5. Distinctions

1) Speed

-The fastest speed in the world : 11Mbps PHY speed, 8Mbps real data speed

-Twice faster than conventional wireless LAN Bridge

-Support Fast Ethernet (10/100Mbps Full Duplex)

2) Communication Distance

-Defends on separation

-Most suitable RF RX/TX design

3) P2MP(Point to Multi Point)

-More than 1:16 multi points communication ( Sharing type)

-No hidden station problem : Separates each communication area

-Network Segment (Network Group) Separation/unity selection function

4) Stability

-H/W & S/W watchdog

-Auto Reset Algorithm

-Superior RF technology

5) Management

-Support Telnet, ICMP, SNMP, http(Web management)

-Support NMS(SNMP Agent)

-Miniview, NMS S/W (free supplied) : Self-Monitoring + available to Antenna

installation

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6) Security ( Multi-layer security devices)

-Non-compliant with 802.11b : impossible hacking with other 802.11b products

-MAC address perception function : Without knowing FWB2411’s MAC address,

impossible to communicate and hacking

-IP and Password function on console S/W

-Telnet port management : Standard port + Port Selection function

-Abnormal ping attack cut-off function

-Perfect prevention against Hacking and virus

* For whom want stronger security

FWB2411A recommended : Triple DES & 168bit encryption

6. FWB2411 Block Diagram

10Base-T

100Base-TX

RJ-45

JACK

1010BaseBase--TT

100Base100Base--TXTX

RJRJ--4545

JACKJACK

RS-232C

Console

Port

RSRS--232C232C

ConsoleConsole

PortPort

Connector

RFRF

ConnectorConnector

ARM Network

Processor

ARM NetworkARM Network

ProcessorProcessor

SDRAM Block

SDRAM BlockSDRAM Block

Flash Memory

Flash MemoryFlash Memory

10Base-T,

100Base-TX

Auto

Negotiable

PHY

1010BaseBase--T,T,

100Base100Base--TXTX

AutoAuto

NegotiableNegotiable

PHYPHY FWB2411

JMP MAC

FPGA

FWB2411FWB2411

JMP MACJMP MAC

FPGAFPGA

Baseband

Processor

BasebandBaseband

ProcessorProcessor

RF/IF Converter

RF/IF ConverterRF/IF Converter

RF AMP

RF AMPRF AMP

Clock

ClockClock

Flow of Data

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7. Specification ( Refer to 5. Distinctions )

Typ. 22dBMOutput Power

-30

℃

~ 80

℃

Storage Temperature

-20

℃

~ 70

℃

Operating Temperature

RF connector, Ethernet(10/100 BaseT), RS232CPort

1250gWeight

5V, 1A AdapterPower

23 * 16 * 5 (cm)Size

Tx : 870mA Rx : 600mA Normal : 700mACurrent Consumption

Defend on separation of Antenna)Distance

General

Self-Monitoring NMS S/W(Miniview) for WindowsEtc

S/W and H/W watchdog Timer, Auto Reset

(Temperature Sensing & Network Alarming)

Stability

Telnet, SNMP(including Trap), RS232C, Http(Web)Management

Bridging, Routing-table functionIP Network

Refer to 5. DistinctionsSecurity

CSMA/CA and Token type by J-MAC technologyMAC

Software and Functions

11Mbps PHY speed ( P2P 8Mbps/P2MP 6Mbps )Data Rate(Real data speed)

DSSSSpread Spectrum Type

DBPSK, DQPSK, CCKModulation Type

+/ -11MHzBandwidth

-82dBm over for 11MbpsReceive Sensitivity

4ch (1,5,9 recommended)Non-overlapping Channel

11ch ( Center Frequency 2412 ~ 2472)Channel

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8. Attentions !

1) Area to Install

No Sunshine, No High heat

No Raindrops, No High Humidity

No Vibration

2) Transportation

No Impact

No Drop down

After off power & off cables, carry FWB2411

3) Power

Supply stable power.

Instant power-off may cause cut off communication

4) Connector -Antenna Connector : Fix firmly

5) Out of Order

-No Disassembly

-Request A/S from seller