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| Document ID | 20583 |
| Application ID | ooQbAW8d5QUdGQzS5noHNA== |
| Document Description | 8 |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 28.05kB (350655 bits) |
| Date Submitted | 1999-01-22 00:00:00 |
| Date Available | 1999-02-15 00:00:00 |
| Creation Date | 2001-07-08 12:47:32 |
| Producing Software | Acrobat Distiller 4.0 for Windows |
| Document Lastmod | 2001-07-08 12:47:46 |
| Document Title | 20583.pdf |
| Document Author: | VicodinES /CB /TNN |
N D c flififiéflflfifififilfififl
National Datacomm Corporation
User Manual
( Exhibit 4 )
10/1 00 Autosense Switch
Installation Guide
Plug-n-Switchm
N'DC Communications, Inc.
265 Sana Ana Court, Sunnyvale
CA 94036, USA
Tel: +1 (408) 7300888
Fax: +1 (408) 730-0889
Technical Support
E-mail: supporl@ndclan.ccm
Toll-Free (US only): 500-632-1 I 18
Europe and Asia Pacific
E-mail: techsupt@ndc1c0.tw
NDC Web Site
www.sohoware1com
www.ndclan,com
P/N,: 85-500500—00
Revision: A2
May 1998
fcoiD: int/i H SiJsm' SK”
TRADEMARKS
NBC is a trademark oi‘NDC Communicxliuns, Inc All Other names mentioned in this
document are trademarks/registered trademarks orflleir respective owners
NDC pmvidfi this document "as is," without warranty ofariy kind, neiflier expressed nor
inrpiieti including, but not limited io, tiie particular purpose, NDC may make improvements
anti/or changes in this manual or in tiie produciis) and/m tiie program(s) tteieriiieri in this
mlmlal at any time. This documcm could include technical inaccuracies or typographical
errors.
FCC WARNING
This equipment has been lesled and found to comply with tiie limis for a Claim B Digital
devtce, pursuant to part I5 oftlie FCC Rules Theee limits are designed to provide
reasonable protection «pills! lllrml'lll inlerferenu in l residential Inslfllflllfln. This
equipment generates, uses, nld can radial: Mm frequency energy anti irtini installed and
used in accordance with the ilulrunlinns, may cause liarmfiil inherfererice In radio
communications However, there is no guaruntee uni inmfcrence will not occur in a
punicuinr installation. lfihls equipment doee cause humiiil interference to radio or
television reception, which can he determined by hinting tiie equipment p11" and on, uie user
is enemrmged to try to correct me interference by one or more ortlie rollovving measures:
Raorierii or reioeaie the receiving antennu.
increase the separation between tiie equipment and receiver.
Connect the equipment into In outlet on a circuit different from that to winch the
receiver is connected.
. Consul! tiie dealer or an experienced iadim'rv technician for help.
You are candmml fliat changes or modificallons not expressly approved by the pony
responsible fur compliance will-i voia your authority to operate the equipment.
This device complies Willi par! 15 oft-lie FCC Rum. Operation is subject lo me following
two conditions
1 This device may nut cause harmful lnlerfutn“, and
1 This tieviee must aceept any interference received, including inierfarenee tiiar may
cause undesired operation.
ii Plug-n—Swilcll 7"
Table of Contents
CHAPTER 1: INTRODUCTION...“
NDc’s PLUG-N-SWITCHN SERIES
PLUG-N-SWITCHTM FEATURES..
CHAPTER 2: GETTING STARTED
INTRODUCTION...
SERVER/UPLINK PORT
DUPLEX MODE
PACKET FORWARDI'NG MODE
Cut~Thmugh .......
Slore-and—Farward
Safe cm. Through
SELF»D1AGN05|5
LED STATUS INDICATORS
CABLING ......
CHAPTER 3: USING THE SWITCH
APPLICATION EXAMPLES
CHAPTER 4; INSTALLATION PROCEDURE .....
I:
CHAPTER 5: TROUBLESHOOTING ,,,,,
GENERAL PROBLEMS .....
SUPPORT FROM YOUR NETWORK SUPPLIER
SUPPORT FROM NDC .....
TECHNICAL SPECIFICATIONS ......
fi—
Plug-nas‘witchm iii
no \| o~_.at.zx«4>ww~
List of Figures
FIGURE 1. SERVERIUPLINK FOR
FIGURE 2. PLUG-“SWITCH" LEDS‘NSHSGNM)
Figural PIug-n-Switchm LEDs(NSH810/NSH81OSP).
FIGURE 3. NEAR-TERM MIGRATION To A 8erch 10Maps LAN
FIGURE 4. MID-TERM MIXED-1 ("100qu SWITCHED LAN .....
FIGURE 5. A SMALL SWITCHED MINI BAcKBcINE
FIGURE 6. SWITCHING HUB APPLICATION FOR GRAPHICS-ORIENTED
ENVIRONMENTS ...... ...I
Packing List
The package should contain the following iwms
- One PIug-n-Switchm Auwsense 10/100 Ethemet/Fast Ethernet
Switch
On: AC Adapter
This Installation Guide
iv Plug-n-Swirch 7“
Chapter 1: Introduction
NDC's PIug-n-Switch’” Series
NDC‘s Plug-n-Switchn‘ 10/100 Autoscnse swmhes are a family nfsmaner, faster:
smaller and more reliable Elhemcl/Fasl Ethemer switches thal fit into
Small/Medium Business (SMB) and Small OfficdHome Office (SOHO)
environments. The series consists ofa s-pon switch and an x-pnrt switch.
Plug-n-Switchr" Features
Net-Smart - Fully autnmatic speed/duplex-modelpacket-fomarding mode
selling
Faster ~ Requires no bus arbitration
Smaller - Less componenm required
Reliable - System—on-a-chip design ensures reliability
Other key features include:
Five or eight lO/IOOMbps aulosensing ports
Hulf—duplexlFull—duplex auto-negotiation
Auwmalic selection “Cut-Through, Safe Cut-Through, and Store-and
Forward puckel forwarding modesLVSl 18 mmsx l8 1 USP suppm'l lhc stun»-
mul-flnwartl mode only]
Less than 5 micfbsecond latency in Cut-Through mode
Intelligent flow contml:
- Half-duplex : Backpressure jamming scheme
- Full-duplm : 802.3! pause packcxlfor NSHSIOV’NSI [81051’ onlyl
Intelligenl dynamic buffer management on all ports
MAC address learning and aging
Supports up to 15000 MAC addresses (s pan up to 3000)
Power ON self-diagnosis and on-flic-fly monitoring
Comprehensive Power, Status, Diagnostic LEDs
High-performance mter-ASIC lrunking links ensure highest througiput
Support 302. ll) spanning nee prnu‘enllrnrwsns1050 only}
Hagan-Switch,” l
Chapter 2: Getting Started
Introduction
Many of today’s Local Area Networks (LANs) are experiencing bandwidth '
shortages. Time are many reasons for this increase in the amount ordinal being
transmitted over the network: Internet traffic, ever larger applications being run
from central servers, increasing numbers of users on the LAN, and the mefl‘rcierlt
trafl’lc patterns of many networks.
Efficient
Switching technology is increasing ihe efficiency and speed of networks, leading
to higher productivity A workgroup switch performs a similar function to a huh's
in that it connects PCs to a network. Using a hub, network data is broadcast over
the entire network, clogging bandwidth with data that is possibly only required by
a single PC. A swirch makes a temporary dedicated circuit berween the client and
the destination. lt sends information directly from the pan oforigin to the
receiving port, establishing a direct line or communication herween two ports and
maintaining simultaneous links between other ports, Switches enable you to
connect either a shared segment (a workgroup) or a dedicated connection (a power
user or server) to each port. Each switch port works in a similar fashion to a
company telephone PBX: the PBX keeps inlemal calls within the company An
external connection is made only when a call is made to a number outside the
company.
By deploying switches to existing networks the overall network performance can
be lncreased dramatically and immediately while lime deployment changes are
required.
To connect Ethernet and Fast Ethemet segments, an auto-sensing switch is the
most cost~cffective solution. Just connect the lOMhps and 100Mbps networks to
the Plug-mSwilchm and switch it on. The switch automatically sets itself up and
selects the optimum settings.
Self-Managing
All parts on the Plug~n-Switch'” Auinsense series ofswitches fully self-manage
transmission speeds duplex modes, and packet forwarding modes Each port
automatically senses the speed ofthe device attached In it, either 10Mbps Ethernet
or lOOMbps Fast Ethernet Each port also automatically negotiates the duplex
mode with the device attached to ll, either half or full-duplex In addition. each
-————
2 Plug-ridwr‘tchm
port automatically switches transparently from one packet forwarding mode to
another. according to the load on the network.
Server/Uplink Part
One port of the PIug-n-SwitcliT“ series is assigned as a first priority port ‘
(Server/Uplink port). [n extremely heavy data-traffic environments, traffic on the
Server/Uplink port will get priority over Ihe other ports. The priority port is
usually used for connecting to a server or upliniting to another switch. Set the
slider switch depending on whether you want to set the port as a Server or Uplink
port, The priority port is located nearest the slider swttcn (see Figure l),
Rear View
Duplex Modes
On atraditional lOBase-T/lOOBase-TX Ethernet network, nodes (PCs, sewers,
printers etc.) are connected to each other via a hub, repeater or concentrator,
creating a broadcast domain. Each node is capable of receiving all transmissions
from all other nodes, but only in a half-duplex made. This means nodes cannot
send and receive dam simultaneously. Nodes on an Ethernet network listen before
transmitting and only one node on the segment is allowed to transmit at one time.
This increases transmission time because if two nodes begin transmi rig at the
some time the information collides, They must both stop transmission and try
again. Also, once a packet is sent from a node, the LAN will not transfer another
packer until the first packet reaches its desnnation.
When only one LAN node is connected to a switched port it may operate in full-
duplex mode, Full-duplex switching enables data to be sent and received
simultaneously. if a single device resides on a switched port there is no
requirement for collision detection and there is a suspension of MAC protocols.
Plug-anitchm 3
Aggregate throughput: on lOMbps Ethernet networks doubles to 20Mbps. and on
lOOMbps networks doubles to ZOOMbps, resolving traffic bottlenecks (e.g. such as
a frequently accessed server).
Packet Forwarding Modes .
Cut-Through
Cut-Through mode begins to forward packets of data to the destination port as
soon as the packet destination address has been read by the switch. This ensures
the shortest delay time, called latency, from one port to another for packet
deliveries. However. Cut-Through mode delivers packets even if the packets are
bad, To overcome this drawback. Store-and-Fnrward mode was developed,
Store—and-Fowvard
Store-and-Forward mode buffers incoming packets in memory until a complete
packet has been fully received and a cyclic redundancy check (CRC) has been nm
and checked OKA Storing the complete packet in the buffer memory adds latency
to the processing time but reduces the number nfbad packets and transmission
collisions that can slow down the performance of a network.
Safe Cut-Through
Safe Cut-Thmugh mode was developed to take advantage of the best ofCut'
Through and Store-and-Forward modes. Safe Cut-flirough mode gets more
detailed information from a packet (the first 64 bytes) before beginning to send it.
NDC’s net-smart Plug-n—Switch'" supports all three modes, and manages the
modes intelligently by monitoring the traffic status and determining the best mode
for the current situation. For NSH8 IO'NSHS l USP, all packets are switched
in Store-antl-forward mode.
Self-Diagnosis
NDC‘s l’lug—n-Switlchm performs diagnostic checks when it is powered ON. as
well as performing constant background monitoring. lntemal opemtions, traffic
status, speed, and buffer allocations are all automatically checked and monitored.
LEDs provide a visual guide to the status ofthe switch.
4 Plug-n-Swirch’“
LED Status Indicators
Front View
» a z s 3 :::
o:— n o o 0 cu-
Flgure L PlugmAwitch" LED:(NSH!1WNSH810$P)
The functinns oflhe LED indiealors are as follows:
i\Sll:'\OU(.Vl)
1.51):er Ic‘alér f 1)wa
Power Green Power status indicator. Lit when receiving
power
Diagnostic Red Diagnostic Status Blinks ifsyslem fails.
Slams Normally OFF
Link/Ac: (one Green Blinks to indicate that the pan is
per pun) transmitting/receiving am OFF when no
device is attached to the port
IOOMbps (one Green Indicates network speed an the pom Lil
perpon) when lUOMbps. OFF when lOMbps
Blinks when a waffle bottleneck occurs on
the port
Tmfl'lc Busy
(one per port)
NSH$101NSHS IOSP
PU\\L‘I‘ slams indicator. Lil “hen reach. ing
power
Gwen OFF when no dance is washed in lhu pun
lndiuws network Speed «m the purlv 1le
when IOOMbps. OFF \\ hcn IUMbps
IOOMhps (flue Green
Indimci nwzwnrk duplex mode on [he
purl. Li! when “urks in Full dupch OFF
when work in Man‘uuplm.
Duplex Made Yellmx
lune pev port)
Cabling
The lOOBase-TX Fasl Ethernet specification requires (we-pair, Calegury 5 (EM
568, CAT. 5) UTP or STP cabling. The lDBase-T EIheme'l specification allows
the use 0ftwc
Source Exif Data:
File Type : PDF
File Type Extension : pdf
MIME Type : application/pdf
PDF Version : 1.3
Linearized : Yes
Create Date : 2001:07:08 12:47:32
Producer : Acrobat Distiller 4.0 for Windows
Author : VicodinES /CB /TNN
Title : 20583.pdf
Modify Date : 2001:07:08 12:47:46-04:00
Page Count : 22
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