D-Link Dgs108b Manual

							D-Link DGS-108 Unmanaged Gigabit Ethernet Switch 
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The  Cable  Diagnostic  function  operates  only  during  the  Switch  boot  up  (when  the  Switch  is  first 
powered on). 
The  Cable  Diagnostic  first  scans  the eight Ethernet  ports  to  determine  if  the  Ethernet  cable  is  in 
good  working  order.  This  process  is  indicated  by  the Speed LED  blinking  green  for  each  of  the 
eight ports, sequentially. The initial port scan takes about 10 seconds. If a cable fault is detected, it 
is  indicated  by the  corresponding  port’s Speed LED  glowing  amber  for  5  seconds,  after the  initial 
port  scan.  The  Switch is then reset  for normal  operation.  It  takes about  2  seconds  for the  Switch  to 
reset.  The  entire  Cable  Diagnostic  process  takes  about  17  seconds  from  the  time  the  Switch  is 
booted.  So,  from  the  time power  is  first  applied  to  the  Switch, about  17  seconds  is required  before 
the Switch will begin normal operation. 
Note:  There  is  no  display  of  cable  faults  detected  by  the  Cable  Diagnostic  during  the  normal 
operation of the Switch, only when the Switch is booted up or power-cycled. 
 
 
 
 
NOTE: The Cable Diagnostic function does not support 10M/100M. If the port is 
connected to a 10M/100M  device,  see  the  Link  LED  to  check if the  cable  is  good 
or not.  
						

							D-Link DGS-108 Unmanaged Gigabit Ethernet Switch 
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Rear Panel Description 
DC Power Jack: 
Power  is  supplied  through  an  external  AC  power  adapter.  Check  the  technical  specification  section  for 
information about the AC power input voltage. 
 
 
Figure 1-3.  Rear panel view of the Switch  
10/100/1000BASE-T Ports: 
Eight Gigabit Ethernet, Auto-Negotiating ports (10/100/1000Mbps) 
Comprehensive LED indicators display the conditions of the Switch and status of the network.  
 
 
 
 
 
 
 
 
 
 
 
 
 
   
						

							D-Link DGS-108 Unmanaged Gigabit Ethernet Switch 
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SECTION 2 
 
Installation 
 
 Package Contents 
Before You Connect to the Network 
 Installing the Switch 
 Power On 
 
Package Contents 
Open  the  shipping  carton  of  the  Switch  and  carefully  unpack  its  contents.  The  carton  should  contain  the 
following items: 
 
 One DGS-108 8-Port 10/100/1000BASE-T Gigabit Ethernet Switch 
 Four rubber feet with adhesive backing 
 One external power adapter 
 This manual 
 
If any item is missing or damaged, please contact your local D-Link reseller for replacement. 
 
Before You Connect to the Network 
The  site  where  you  install  the  Switch  may  greatly  affect  its  performance. Please  follow  these  guidelines  for 
setting up the Switch. 
 
 Install  the  Switch  on  a  sturdy,  level  surface  that  can  support  at  least  3  kg  (6.6  lbs.)  of  weight.  Do  not 
place heavy objects on the Switch. 
 The power outlet should be within 1.82 meters (6 feet) of the Switch. 
 Visually inspect the power cord and see that it is fully secured to the AC power port. 
 Make sure that there is adequate space for proper heat dissipation from and adequate ventilation around 
the Switch. Leave at least 10 cm (4 inches) of space at the front and rear of the Switch for ventilation. 
 Install  the  Switch  in  a  fairly  cool  and  dry  place  for  the  acceptable  temperature  and  humidity  operating 
ranges. 
 Install the Switch in a site free from strong electromagnetic field generators (such as motors), vibration, 
dust, and direct exposure to sunlight. 
 When  installing  the  Switch  on  a  level  surface,  attach  the  rubber  feet  to  the  bottom  of  the  device.  The 
rubber  feet  cushion  the  Switch,  protect  the  casing  from  scratches,  and  prevent  it  from  scratching  other 
surfaces.  
						

							D-Link DGS-108 Unmanaged Gigabit Ethernet Switch 
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Mounting the Switch on a Wall 
The  DGS-108  can  be  mounted  on  a  wall. Two  mounting  slots  are  provided  on the  bottom  of  the  Switch  for  this 
purpose. Make sure that the front panel is exposed in order to view the LEDs. Refer to the illustration below: 
A.)  Cement wall  
1. Mount the nylon screw anchors into a cement wall. 
2. Drive the T3 x 15L screws into the nylon screw anchors. 
3. Hook  the  mounting  holes  at  the  back  of  the  switch onto  the  screws.  The  wall-mount  process  is 
complete. 
 
B.)  Wooden wall 
1.   Insert the T3 x 15 L screws into the wood wall. 
2.   Hook  the  mounting  holes  at  the  back  of  the  switch  onto  the  screws.  The  wall-mount  process  is 
complete. 
 
 
 
Figure 2- 1.  Mounting the Switch to a Wall 
   
						

							D-Link DGS-108 Unmanaged Gigabit Ethernet Switch 
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Attaching the Rubber Feet  
Use the rubber feet provided. Position and apply the rubber feet to the underside of the DGS-108 Switch. 
 
 
Figure 2- 2.  Attaching the Rubber Feet 
 
Provide for Adequate Ventilation   
 
 
 
 
 
 
 
 
Power On 
Plug one end of the AC to DC power converter into the power connector of the Switch and the other end into the 
local power source outlet.  
After the Switch is powered on, the LED indicators will momentarily blink. This blinking of the LED indicators 
represents a reset of the system. 
 
Power Failure 
As  a  precaution,  in  the  event  of  a  power  failure,  unplug  the  Switch.  When  power  is  resumed,  plug  the  Switch 
back in. 
 
 
CAUTION: Do  not  place  any  device  on  top  of  Switch,  or  place  the  Switch  on  top 
of  any  device  or  object  that  will  block  the  free  flow  of  air  through the  ventilation 
slots on the sides, top, and bottom of the Switch’s case. In addition, care should be 
taken  not  to  locate  the  Switch  next  to,  on  top  of,  or  underneath  any  device  that 
generates  a  significant  amount  of  heat.  For  the  Switch  to  perform  at  its  optimal 
level,  the  Switch  must  have  adequate  ventilation  to  prevent  the  Switch from 
overheating and becoming damaged.   
						

							D-Link DGS-108 Unmanaged Gigabit Ethernet Switch 
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Section 3  
Connecting The Switch 
 
Switch To End Node 
Switch To Hub or Switch 
Connecting To a Server 
 
 
Switch To End Node 
End  nodes  include  PCs  outfitted  with  a  10,  100,  or  1000  Mbps  RJ-45  Ethernet/Fast  Ethernet  Network  Interface 
Card (NIC) and most routers. 
An  end node  can  be  connected  to  the  Switch  via  a  twisted-pair  Category  3,  4,  5,  or  5e  UTP/STP  cable. The  end 
node can be connected to any of the ports of the Switch.   
 
 
Figure 3-1. Switch connected to an end node 
The Link/Act LEDs for each UTP port light green when the link is valid. The LED over the port label indicates 
a port speed of either 10/100 Mbps or 1000Mbps. A blinking LED on the bottom indicates packet activity on that 
port. 
 
Switch to Hub or Switch 
These connections can be accomplished in a number of ways using a standard Ethernet cable. 
 
 A  10BASE-T  hub  or  switch  can  be  connected  to  the  Switch  via  a  twisted-pair  Category  3,  4,  5,  or  5e 
UTP/STP cable. 
 A  100BASE-T  hub  or  switch  can be  connected  to  the  Switch  via  a  twisted -pair  Category  5  UTP/STP 
cable.   
 
NOTE: All  eight high-performance  NWay  Ethernet ports  can  support  both  MDI-
II and MDI-X connections.   
						

							D-Link DGS-108 Unmanaged Gigabit Ethernet Switch 
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 A  1000BASE-T  switch  can  be  connected  to  the  Switch  via  a  twisted -pair  Category  5e  or  better 
UTP/STP cable.   
 
Figure 3-2. Switch connected to a port on a hub or switch using either a straight or crossover cable–
any standard Ethernet cable is fine 
 
Connecting To Network Backbone or Server 
Any of the eight Gigabit Ethernet ports are ideal for uplinking to a network backbone or network server.  
 
 
Figure 3-3. Connection to a Server 
 
 
 
 
    
						

							D-Link DGS-108 Unmanaged Gigabit Ethernet Switch 
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Appendix A 
Technical Specifications 
 
General 
Standards: IEEE 802.3ab 1000BASE-T 
IEEE 802.3u 100BASE-TX 
IEEE 802.3 10BASE-T 
IEEE 802.3x Flow Control 
IEEE 802.1p QoS 
Protocol: CSMA/CD 
Data Transfer Rate: Ethernet: 10Mbps (Half-duplex) 
20Mbps (Full-duplex) 
Fast Ethernet: 100Mbps (Half-duplex) 
200Mbps (Full-duplex) 
Gigabit Ethernet: 2000Mbps (Full-duplex) 
 Topology: Star 
Network Cables: Ethernet: 2-pair UTP Cat. 3,4,5, Unshield Twisted Pair (UTP )Cable  
Fast Ethernet: 2-pair UTP Cat. 5,                       Unshield Twisted Pair (UTP )Cable 
Gigabit Ethernet: 4-pair UTP Cat. 5,                       Unshield Twisted Pair (UTP )Cable  
Number of Ports: Eight 10/100/1000BASE-T Gigabit Ethernet ports 
 
 
Physical and Environmental 
DC Inputs: 
AC-DC 7.5V/1.5A 
This unit is to be used with a power supply listed below or equivalent: 
AM-0751500D for USA 
AM-0751500S for Australia 
AM-0751500B for UK 
AM-0751500M for China 
AM-0751500V for Europe 
Power Consumption: 6.7 watts maximum 
Operating Temperature: 32F ~ 104F  (0 C ~ 40℃) 
Storage Temperature: 14F ~ 158F (-10C ~ 70C) 
Humidity: 5% ~ 95% RH, non-condensing 
Dimensions: 7.76 in. x 4.49 in. x 0.34 in. (197 mm x 114 mm x 8.6 mm) 
EMI FCC Class B, ICES-003 Class B 
Safety: CSA International 
 
 
 
 
  
						

							D-Link DGS-108 Unmanaged Gigabit Ethernet Switch 
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Performance 
Transmission Method: Store-and-forward 
RAM Buffer: 144Kbytes per device 
Filtering Address Table: 8K MAC address per device 
Packet Filtering/ Forwarding Rate: Full wire speed 
MAC Address Learning: Self-learning, auto-aging 
Jumbo Frame:  9600Bytes  
						

							D-Link DGS-108 Unmanaged Gigabit Ethernet Switch 
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Glossary 
1000BASE-LX – A  long  wavelength  for  a  long  haul  fiber  optic  cable  for  a  maximum  length  of  10 
kilometers. 
1000BASE-SX – A  short  laser  wavelength  on  multimode  fiber  optic  cable  for  a  maximum  length  of  550 
meters. 
100BASE-FX – 100Mbps Ethernet implementation over fiber. 
100BASE-TX – 100Mbps Ethernet implementation over Category 5 and Type 1 Twisted Pair cabling. 
10BASE-T – The IEEE 802.3 specification for Ethernet over Unshielded Twisted Pair (UTP) cabling. 
aging –  The automatic removal of dynamic entries from the Switch Database which have timed-out and are 
no longer valid. 
ATM – Asynchronous  Transfer  Mode.  A  connection  oriented  transmission  protocol  based  on  fixed  length 
cells  (packets).  ATM  is  designed  to  carry  a  complete  range  of  user  traffic,  including  voice,  data,  and  video 
signals. 
auto-negotiation – A  feature  on  a  port,  which  allows  it  to  advertise  its  capabilities  for  speed,  duplex,  and 
flow  control.  When  connected  to  an  end  station  that  also  supports  auto-negotiation,  the  link  can  self-detect 
its optimum operating setup.  
backbone  port – A port that does not learn device addresses, and that receives all frames with an unknown 
address. Backbone ports are normally used to connect the Switch to the backbone of your network. Note that 
backbone ports were formerly known as designated downlink ports. 
backbone – The  part  of  a  network  used  as  the  primary  path  for  transporting  traffic  between  network 
segments. 
Bandwidth – Information capacity, measured in bits per second, that a channel can transmit. The bandwidth 
of Ethernet is 10Mbps, the bandwidth of Fast Ethernet is 100Mbps. 
baud rate – The switching speed of a line. Also known as line speed. 
BOOTP – The  BOOTP  protocol  allows  you  to  automatically  map  an  IP  address  to  a  given  MAC  address 
each  time  a  device  is  started.  In  addition,  the  protocol  can assign the  subnet mask and  default  gateway  to  a 
device. 
bridge – A  device  that  interconnects  local  or  remote  networks  no  matter  what  higher  level  protocols  are 
involved. Bridges form a single logical network, centralizing network administration. 
broadcast – A message sent to all destination devices on the network. 
broadcast  storm – Multiple simultaneous broadcasts that typically absorb available network bandwidth and 
can cause network failure. 
console  port – The  port  on  the  Switch  accepting  a  terminal  or  modem  connector.  It  changes  the  parallel 
arrangement  of  data  within  computers  to  the  serial  form  used  on  data  transmission  links.  This  port  is  most 
often used for dedicated local management. 
CSMA/CD – Channel access method used by Ethernet and IEEE 802.3 standards, in which devices transmit 
only after finding the data channel clear for some period of time. When two devices transmit simultaneously, 
a collision occurs and the colliding devices delay their retransmissions for a random amount of time. 
data center switching – The point of aggregation within a corporate network where a switch provides high-
performance  access  to  server  farms,  a  high-speed  backbone  connection,  and  a  control  point  for  network 
management and security. 
Ethernet – A  LAN  specification  developed  jointly  by  Xerox,  Intel,  and  Digital  Equipment  Corporation. 
Ethernet networks operate at 10Mbps using CSMA/CD to run over cabling. 
Fast Ethernet – 100Mbps technology based on the Ethernet/CD network access method. 
Flow  Control – (IEEE  802.3x)  A  means of  holding  packets  back  at  the  transmit  port  of  the  connected  end 
station. Prevents packet loss at a congested switch port. 
forwarding – The process of sending a packet toward its destination by an internetworking device. 
full  duplex – A  system  that  allows  packets  to  be  transmitted  and  received  at  the  same  time  and,  in  effect, 
doubles the potential throughput of a link.