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
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