ARCNET LAN LAN

Datapoint 70 ARCNET

LAN Datapoint

=ARC+ ARC

Attached Resource Computer

ARCNET

AR C NET

ARCNET

ARCNET

ARCNET

ARCNET

ARCNET

0~507

2.5 Mbps ARCNET

ARCNET 16 CRC

CRC--- Cyclic Redundancy Check

ARCNET

ARCNET OSI Open Systems Interconnect

ARCNET

ARCNET

MAC Medium Access Control

ARCNET MAC

255

ARCNET

ARCNET

ARCNET

ARCNET MAC

0 255 0

MAC

ITT Invitation to Transmit

MAC

MAC 6

109 122 255

FBE (Free Buffer Enquiry)

ACK NAK

ACK

0 507

CRC ACK

507

ARCNET

0 0

MAC

ACK

NAK

ARCNET

MAC MAC

1 ...

1

1

ARCNET

ARCNET

HUB

HUB HUB

6.7 4

ARCNET

NIM(Network Interface Modules)

ARCNET ARCNET

ARCNET

ARCNET ARCNET

ARCNET Datapoint

(RIM) SMSC Standard MicroSystems

Corporation

ARCNET RIM

SMSC TMC (Toyo Microsystems

Corporation) ARCNET

HUB

HUB HUB

HUB HUB

HUB

90C26

90C65 XT

90C982A XT

90C126 XT

90C165 XT

90C66 XT

90C198 XT

210010

210019

20020

20022

20051

20051+

HUB

HUB 4

HUB 1

200 100 2

93

HUB

4

HUB HUB

HUB

HUB

HUB HUB

HUB

HUB HUB

HUB

HUB

HUB

H U B

ARCNET

HUB

HUB HUB

HUB

HUB

HUB HUB HUB

ARCNET LAN HUB

HUB

HUB

HUB

EIA-485

RG-62/U BNC "T"

HUB

HUB

/ HUB

HUB

HUB

HUB

:

RJ-11

RJ-11

(Multidrop):

T

ARCNET

ARCNET

HUB

ARCNET BNC

HUB HUB

RG-59/u RG-62/u

HUB

RC-62/u BNC T

HUB 1 2 3

HUB

(UTP) IBM

#24 #24 AWG UTP

BALUN HUB

HUB BALUN BALUN

RJ-11

BALUN

RJ-11

HUB

SMA ST(tm)

50/125 m 62.5/125 m 100/140 m

62.5/

125 m 62.5/125 m 850nm

SMA

ST ST BNC SMA

SMA

14 1300nm

1300nm 850nm

EIA-485 EIA-485

RJ-11

EIA-485 HUB

EIA-485 EIA-485

EIA-485

EIA-485

ARCNET

HUB

ARCNET

RG-62/u RG-59/u

ARCNET 75 RG-59/u 93

RG-62/u

BNC T

RS-485

UTP

IBM

62.5/125

tight buffering

loose buffering

ARCNET

ARCNET

ARCNET RG-62/u HUB

HUB

RG-62/u

HUB

ARCNET P1 P2

2.5Mbps

P1 P2 100ns P2 P1

1 P1 100ns

P2 0 P1 P2

P1 P2 200ns ARCNET

400ns 200ns

P1 P2

P1

P1 P2

P2

200 ARCNET 5MHz

2.5MHz 5MHz

2.5MHz

P1 P2

93

BNC BNC

RG-62/u

610 2000

305 BNC T

2 6

1000VDC

BALUN BALUN

MUX LAB 10070 BNC

RJ-11

BALUN RJ-

11 BALUN

RJ-11 BALUN

HUB

2 6

HUB

HUB

HUB

HUB

ARCNET 2.5Mbps COM20019

COM20020 COM20022 COM20051 ARCNET

Prescaler

HUB HUB

210019 19Kbps

1 1 1

2 LINE- 2 2

3 LINE+ 3 LINE- 3

4 4 LINE+ 4

LINE-

5 5 LINE+

6 6

7

8

20022 10Mbps

2.5Mbps

ARCNET COM20019, COM20020,

COM20022, COM20051

ARCNET --- P1 P2

Backplane P1 200ns P2

RXin

P1

RXin P1

P1 RXin

EIA-485

EIA-485 EIA-485

TXEN

TXEN ARCNET

TXEN

EIA-485 EIA-485

Backplane ARCNET backplane ARCNET

EIA-485 backplane ARCNET P1

TXEN ARCNET EIA-485

EIA-48 5

ARCNET

EIA-485

ARCNET MAC

EIA-485

EIA-485

ARCNET EIA-485

SMSC Standard MicroSystems Corporation

ARCNET EIA-485

100~120 STP UTP

ARCNET

OFF

(SMsC) 810

1600

274 900 17

+/-7V

EIA-485 SMSC

1000V

EIA-485

1

EIA-485 13

213 700

HUB 213~274

700~900

HUB

EIA-485

HUB

RG-62/u BNC T 93

RJ-11

RJ-11

ARCNET

EMI RFI

ARCNET

50 62.5 100

850nm

3 1300nm

14

dB

1m

0.5~1dB

1500m 62.5 3.5dB/1000m

5.25dB

0.5dB 6.25dB 10.

4dB 5.15dB

3dB

0

100

ARCNET HUB

HUB

ARCNET

HUB ARCNET

ARCNET ARCNET

HUB ARCNET

HUB HUB

HUB

HUB

ANSI/ATA878.1--- 2.5Mbps

ARCNET ATA ARCNET

ARCNET

ARCNET

ARCNET /

ARCNET

ARCNET HUB

ARCNET 2.5Mbps

400ns 1

0

<SD>

1 1 1 1 1 1 (6 )

ARCNET 1

<RSU>

1 1 1 1 1 1 1 1 0 (9 )

<ISU>

1 1 0 d0 d1 d3 d4 d5 d6 d7 (11 )

ISU 3 110 8 ISU

<SOH> 0 01

<ENQ> FBE 0 85 FBE (

<ACK> 0 86

<NAK> 0 15

<EOT> 0 04

<NID> 0 01 0 FF

NID MAC

<SID> 0 01 0 FF MAC

<DID> 0 01 0 FF

MAC

<CP> (0

252 CP ISU

256 507 CP ISU

<SC> 0 01 0 FF SC

ISU SC ISU Datapoint

ATA ARCNET

<...DATA...>

0 252 ISU 256 507 ISU

ISU 253 254 255

0

<FCS> 0 0000 0 ffff 16

CRC (CRC- ) 2 ISU

ARCNET

ARCNET

ITT

<SD><EOT><NID><NID>

FBE FBE

<SD><ENQ><DID><DID>

ACK

<SD><ACK>

NAK

<SD><NAK>

PAC

<SD><SOH><SID><DID><DID><CP><SC><...DATA...>

<FCS>

NID FBE

DID

FBE FBE-

--Free Buffer Enquiry

SID

SID

ARCNET CP

SC

ARCNET

SC ARCNET

0 80

0 80

0 80

Datapoint

765 RSU

RECON--- <RSU><RSU>------- <RSU> 765

RSUs

ARCNET

ARCNET

ARCNET 5Mbps

2.5Mbps 2.5Mbps ARCNET

ARCNET 12.6 s

4ns/m 5ns/m 5.5ns/m

Tpt

Tpt 31 s

Tpm 31 s

Tpd 15.6 s

Trp 2 (31 s)

ARCNET

Trp Trp

75.6 s

Trc 2 s

Tac 82.4 s

ARCNET

Hub

Tpt Tpm

ARCNET 6.7 4

22000 RG-62/u HUB

6.7

75.6 s

12.6 s

31 s

6.7 10 HUB

8 85m HUB

170m Tpt Tpm

HUB 320ns

Tpt=Tpm=170(4)+320=1.0 s.

29.2 s 8

233.6 s

100

100

T = 145.4+4.4*100+Tpt+4*Tpm = 145.4+440+1+4=590.4 s

7 204.4 s

794.8 s

ARCNET ARCNET

ET1 ET2

ARCNET 75.6 s (ET1=ET2=1)

NID

2.5 Mbps ARCNET

ARCNET

ARCNET

HUB

31 s

OSI Open Systems Interconnection

ARCNET IEEE

MAC

ARCNET

ARCNET

Collapsed Stack or Null Stack ---

ControlLink --- (SMsC)

MAC LLC ControlLink

IEEE802.2

NetBIOS --- NetBIOS ATA NetBIOS

IBM Microsoft NetBIOS

ARCNET NetBIOS TCP/IP

IPX/SPX

NetBEUI --- NetBIOS NetBEUI

NetBIOS Microsoft

TCP/IP --- TCP/IP Internet

TCP IP TCP/IP

ARCNET Internet

IPX/SPX---- IPX/SPX XNS

Novell Novell NetWare

Micro sof t IPX/SPX

NWLINK

NDIS --- Microsoft 3Com

Windows for Workgroups Windows 95 Win-

dows 98 Windows NT ARCNET NDIS

NetBEUI IPX/SPX TCP/

IP NDIS NDIS4.0

32 Windows 95B NT4.0

ODI --- ODI Novell

Novell NetWare ODI Microsoft

Microsoft Windows for Workgroups3.11

ARCNET

OEM

A T A

ARCNET ARCNET NetBIOS ATA

ARCNET

RFC 1121 RFC---Request

for comments ARCNET

ATA878.2

ARCNET

ARCNET

/

1987

A T A

ARCNET

A T A

ARCNET ARCNET

ATA ANSI

ANSI ATA878.1 2.5Mbps

ARCNET

ATA

ARCNET

ATA ARCNET

ATA ATA

ata@ar cnet. com

www.arcnet.com

"ARCNET Designer's Handbook", Document 61610,Datapoint Corporation, 1983

"ARCNET Cabling Guide", Document 51087,Datapoint Corporation, 1988

"ARCNET Factory LAN Primer",Contemporary Control Systems, Inc., 1987

"RS-485 Cabling Guidelines for the COM 20020", Technical Note 7-5, Revision E, Standard MicrosystemsCorporation, May 1994

"ARCNET's Already Flexible Physical Layer Enhanced withSeveral EIA-485 Varients", George Thomas, Fieldcomms USA, June 1997

"Microsoft Developer Network CD",Microsoft Corporation, January 1998