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                    GT-1205A
                
                                
                
                
                                
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1. Package Contents
Thank  you  for  purchasing  PLANET  1-Port  10/100/1000BASE-T 
to 2-Port 100/1000BASE-X Media Converter, GT-1205A.
Open the box of the GT-1205A and carefully unpack it. The box 
should contain the following items:
Gigabit Media Converter x 1 User's Manual x 1
AC-DC Adapter (Output: 5V DC, 2A max.) x 1
If  any  item  is  missing  or  damaged,  please  consult  the  dealer 
from whom you purchased your GT-1205A.
Note
The  GT-1205A  comes  with  one  vacant  SFP  module 
slot.  The  mini  GBIC  SFP  module  is  not  bundled 
with in the package.
 Compact in size, easy installation
 Co-works  with  PLANET’s  10”/19”  Media  Converter  Chassis 
(MC-700/MC-1500/MC-1500R/MC-1500R48)
 Wall mounting and DIN-rail installation supported
 Standard
 Complies with IEEE 802.3 10BASE-T
 Complies with IEEE 802.3u 100BASE-TX/100BASE-FX
 Complies with IEEE 802.3ab 1000BASE-T
 Complies with IEEE 802.3z 1000BASE-SX/LX
 IEEE  802.3x  full-duplex  ow  control;  back  pressure  for 
half duplex to prevent packet loss
3. Hardware Introduction
3.1  Front Panel and LED Indicators
 GT-1205A Front Panel
The  GT-1205A  consists  of  two  100/1000BASE-X  SFP  slots  and 
one  auto-sensing  10/100/1000Mbps  Ethernet  RJ45  port.  Figure 
1 shows the front panel of the GT-1205A.
1000
1
1
2
2
3
PWR
LNK/
ACT
GT-1205A
Figure 1:  GT-1205A Front Panel
4. Redundancy Overview
The GT-1205A provides rapid ber redundancy of link for highly 
critical  Ethernet  applications.  The  redundant  mode  supports 
auto-recover  function.  If  the  destination  port  of  a  packet  is 
linked down,  it  will  forward  the  packet  to  the  other port of the 
backup pair. The following gure shows the redundant function.
Figure 4:  Redundancy Behavior Topology
 Link status auto detection and redundancy of dual ports with 
the same connector type.
 Only  the Primary  Port  is  active at  a  time, the  Backup  Port  is 
blocked.
3.2  Rear Panel
The  rear  panel  of  the  GT-1205A  has  one  DC  jack,  which 
accepts  an  input  power  of  5V  DC  with  2A.  The  brand-new  DIP 
switch  designed  for  1000BASE-X  SFP  module  or  100BASE-FX 
SFP module supports on  dual  SFP slots. The  default DIP switch 
mode is 1000BASE-X.
SFP Speed
5V DC
1000BASE-X 100BASE-FX
Figure 2:  GT-1205A Rear Panel
Caution
Please power  off and power  on the GT-1205A after 
adjusting the DIP switch setting.
Power Information
The  center  pin  diameter  of  the  GT-1205A’s  power  jack  is 
2.5mm  and  the  power  jack  allows  an  input  power  of  5V  DC. 
It  conforms  to  the  bundled  AC-DC  adapter  and  PLANET’s 
media  chassis.  Should  you  have  any  issue  about  the  power 
connection, please contact your local sales representative.
Please  keep  the  AC-DC  adapter  as  a  spare  part  when  your 
GT-1205A is installed to a Media Chassis.
2. Product Features
 Interface
 Dual 100/1000BASE-X SFP ber-optic slots
 One 10/100/1000BASE-T  copper  port  with  auto MDI/MDIX 
function
 Auto-negotiation  for  10/100/1000BASE-T;  half-duplex  or  full-
duplex for 10Mbps and 100Mbps, full-duplex for 1000Mbps
 Supports  maximum  frame  size  up  to  10K  jumbo  packet 
size
 IEEE 802.1Q tagged VLAN transparent, multicast passthrough
 Redundancy
 Link  status  auto-detection  and  redundancy  of  dual  ports 
with the same connector type
 Allows  only  the  Primary  Port  or  the  Backup  Port  to  acti-
vate at a time
-  When  Primary  Port  link  failure  occurs, the  trac  swaps 
to Backup Port automatically
-  Once  the  Primary  Port  link  regains,  the  trac  swaps 
from the Backup Port to the Primary Port
-  Redundant hardware ber port
 Mechanical
 External 5V DC, 2.5A power supply
 LED indicators for easy network diagnostics
 DIP  switch  for  100FX  or  1000X  SFP  module  supports  on 
dual SFP slots
 DIP  switch  for  3-port  operation  in  Gigabit  switch  mode  or 
redundant mode
 GT-1205A LED Indication
 System
LED Color Function
PWR Green Lit when +5V DC power is detected.
 100/1000BASE-X SFP Slots
LED Color Function
1Green
Lit
Indicates that the ber optical port is 
linked up.
Blink
Indicates that the converter is actively 
sending or receiving data over that port.
O
Indicates that the ber optical port is 
linked down.
2Green
Lit
Indicates that the ber optical port is 
linked up.
Blink
Indicates that the converter is actively 
sending or receiving data over that port.
O
Indicates that the ber optical port is 
linked down.
 10/100/1000BASE-T Port
LED Color Function
LNK/
ACT
Orange
Lit Indicates that the copper port is linked up.
Blink
Indicates that the converter is actively 
sending or receiving data over that port.
O
Indicates that the copper port is linked 
down.
1000 Green
Lit
Indicates that the copper port is 
operating at 1000Mbps.
O
Indicates that the copper port is linked 
down 10/100Mbps or  .
2.5mm
DC Receptacle 2.5mm
+5V for each slot
DC  receptacle  is  2.5mm  wide  that  conforms  to  the  GT-
1205A’s  2.5mm  DC  jack's  central  post.  Do  not  install  any 
improper unit.
The device is a power-required device, meaning it will not work 
till  it  is  powered.  If  your  networks  should  be  active  all  the 
time,  please  consider  using  UPS  (uninterrupted  power  supply) 
for  your  device.  It  will  prevent  you  from  network  data  loss  or 
network downtime.
In  some  areas,  installing  a  surge  suppression  device  may 
also  help  to  protect  the  GT-1205A  from  being  damaged  by 
unregulated surge or current.
3.3  Side View
The side panel of the GT-1205A has a DIP switch for setting to 
the  3-port  switch  mode  or  the  2-port  redundant  mode.  When 
“ON” “OFF”, it is  in the 2-port redundant mode. And when  , it 
is in the 3-port switch mode.
OFF
ON
Redundant
3-Port Switch OFF
2-Port Redundant ON
Figure 3:  GT-1205A Side Panel
 When  the  Primary  Port’s  link  failure  occurs,  the  trac  will 
swap to Backup Port automatically.
 Once  the  link  of  the  Primary  Port  is  back,  the  trac  will 
swap from Backup Port to Primary Port.
5. Installing The Converter
The  GT-1205A  can  be  connected  over  ber  optic  cabling  at  a 
distance  extended from  550  meters  to  2km  (multi-mode ber) 
to  10/20/40/60/80/120  kilometers  (single-mode  ber  or  WDM 
ber),  using  the  100/1000BASE-X  SFP  modules.  The  SFP 
modules  are hot-pluggable  and hot-swappable.  You  can  plug  in 
and  out  the  SFP  modules  to  and  from  any  SFP  port  without 
having to power down the GT-1205A.
To  install  GT1205A,  please  follow  these  steps  to  install  the 
GT-1205A:
Ethernet Installation
Step 1:  Turn  o  the  power  of  the  device/station  in  a  network 
to which the GT-1205A will be attached.
Step 2:  Ensure that there is no activity in the network.
Step 3:  Slide  in  the  100/1000BASE-X  SFP  module.  Make  sure 
both  sides  of  the  SFP  modules  are  with  the  same 
media  type,  for  example,  100BASE-FX/2km  multi-
mode  to  100BASE-FX/2km  multi-mode,  1000BASE-
SX/550m  multi-mode  to  1000BASE-SX/550m 
multi-mode  or  1000BASE-LX/10km  single  mode  to 
1000BASE-LX/10km single mode.
Produkspesifikasjoner
| Merke: | Planet | 
| Kategori: | Ikke kategorisert | 
| Modell: | GT-1205A | 
| Vekt: | 180 g | 
| Bredde: | 94 mm | 
| Dybde: | 70 mm | 
| Høyde: | 26 mm | 
| LED-indikatorer: | Ja | 
| Tilkoblingsteknologi: | Koblet med ledninger (ikke trådløs) | 
| Sertifisering: | FCC Class B, CE | 
| Inngangsspenning: | 5 V | 
| Nettverksstandard: | IEEE 802.3, IEEE 802.3ab, IEEE 802.3u, IEEE 802.3x, IEEE 802.3z | 
| Bølgelengde: | - nm | 
| Maksimal dataoverføringshastighet: | 1000 Mbit/s | 
| Auto MDI/MDI-X: | Ja | 
| DIN-skinnemontering: | Ja | 
| Fiberoptisk kontakt: | SFP | 
| Produktfarge: | Sort | 
| Antall ethernets-/bredbåndstilkoblinger (RJ-45): | 1 | 
| Driftstemperatur (T-T): | 0 - 50 °C | 
| Oppbevaringstemperaturomåde (Celsius): | -10 - 70 °C | 
| Lagringsrelativ fuktighet: | 5 - 95 | 
| Harmonisert system (HS)-kode: | 85176990 | 
| Ethernet LAN dataoverføringshastigheter: | 10,100,1000 Mbit/s | 
| Ethernet-grensesnittype: | Gigabit Ethernet | 
| Relativ luftfuktighet under drift (H-H): | 5 - 95 | 
| Intern: | Nei | 
| Plugg inn og spill: | Ja | 
| Fibre Channel-porter: | 2 | 
| Innput-strøm: | 2 A | 
| Maksimal overføring avstand: | 120000 m | 
| Tosidig system: | Full, Half | 
| Omformer-inngangsgrensesnitt: | 1000Base-T | 
| Omformer-utgangsgrensesnitt: | 1000Base-X | 
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