Planet GT-1205A User manual

10/100/1000Base-T to Dual 1000Base-X SFP
Media Converter
GT-1205A
User’s Manual

Trademarks
Copyright © PLANET Technology Corp. 2013
Contents subject to revision without prior notice.
PLANET is a registered trademark of PLANET Technology Corp.
The information in this manual is subject to change without
notice. All other trademarks belong to their respective owners.
Disclaimer
PLANET Technology does not warrant that the hardware will
work properly in all environments and applications, and makes
no warranty and representation, either implied or expressed,
with respect to the quality, performance, merchantability, or
tness for a particular purpose.
PLANET has made every effort to ensure that this User’s Manual
is accurate; PLANET disclaims liability for any inaccuracies or
omissions that may have occurred.
Information in this User’s Manual is subject to change without
notice and does not represent a commitment on the part of
PLANET. PLANET assumes no responsibility for any inaccuracies
that may be contained in this User’s Manual. PLANET makes no
commitment to update or keep current the information in this
User’s Manual, and reserves the right to make improvements
to this User’s Manual and/or to the products described in this
User’s Manual, at any time without notice.
If you nd information in this manual that is incorrect,
misleading, or incomplete, we would appreciate your comments
and suggestions.

FCC Warning
This equipment has been tested and found to comply with the
regulations for a Class B digital device, pursuant to Part 15 of
the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment
is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with this user’s guide, may
cause harmful interference to radio communications. Operation
of this equipment in a residential area is likely to cause harmful
interference, in which case the user will be required to correct
the interference at his own expense.
CE Mark Warning
This is a Class B product. In a domestic environment, this
product may cause radio interference, in which case the user
may be required to take adequate measures.
Energy Saving Note of the Device
This power required device does not support Standby mode
operation.
For energy saving, please remove the DC-plug or push the
hardware Power Switch to OFF position to disconnect the device
from the power circuit.
Without remove the DC-plug or switch off the device, the
device will still consume power from the power source. In the
view of Saving the Energy and reduce the unnecessary power
consuming, it is strongly suggested to power off or remove the
DC-plug for the device if this device is not intended to be active.

WEEE Warning
To avoid the potential effects on the environment and
human health as a result of the presence of
hazardous substances in electrical and electronic
equipment, end users of electrical and electronic
equipment should understand the meaning of the crossed-out
wheeled bin symbol. Do not dispose of WEEE as unsorted
municipal waste and have to collect such WEEE separately.
Revision
User’s Manual for PLANET Gigabit Ethernet Redundant Media
Converter
For Model: GT-1205A
Rev 2.0 (Febauary. 2013)
Part No: 2350-AA4530-001

Table Of Contents
1. Introduction...................................................................... 6
1.1 Checklist .................................................................... 6
1.2 Product Description ..................................................... 6
1.3 Product Features......................................................... 7
1.4 Product Specication ................................................... 9
2. Hardware Description ...................................................... 11
2.1 Product Outlook ........................................................ 11
2.2 Front Panel............................................................... 12
2.2.1 LED Indicators ................................................. 12
2.3 Rear Panel................................................................ 13
2.4 Side View................................................................. 14
2.5 Install the Media Converter........................................ 16
2.5.1 Stand-alone Installation .................................... 16
2.5.2 Media Chassis Installation ................................. 18
2.5.3 Optional DIN-Rail Installation ............................ 19
Appendix A Networking Connection ...................................... 21
A.1 Data RJ-45 Pin Assignments - 1000Mbps, 1000Base-T . 21
A.2 10/100Mbps, 10/100Base-TX...................................... 21
A.3 Fiber-Optic Cable Connection Parameter...................... 23

6
1.Introduction
1.1 Checklist
Check the contents of your package for following parts:
GT-1205A x 1l
User’s Manual x 1l
5V / 2.5A AC-DC Power Adapter x 1l
If any of these pieces are missing or damaged, please contact
your dealer immediately, if possible, retain the carton including
the original packing material, and use them against to repack
the product in case there is a need to return it to us for repair.
Note
GT-1205A is with two vacant SFP module slots.
The 1000Base-X SFP module is not bundled with
in the package
1.2 Product Description
The GT-1205A is 3-Port Gigabit, one TP and dual SFP
Media Converter which supports conversion between
10/100/1000Base-T and 1000Base-SX/LX network, which is SFP
connector with single-mode or multi-mode media as required.
The Ethernet signal allows different types of SFP transceiver to
connect easily, efciently and inexpensively.
The GT-1205A Gigabit Media Converter can be used as a
stand-alone unit or as a slide-in module to the PLANET Media
Converter Chassis (MC-700 and MC-1500 series chassis). These
media chassis can assist in providing DC power for GT-1205A
Gigabit Media Converter to maintain the ber-optic network at
one centralized location. With the 3-Port Switch mode, they
work in high performance Store and Forward mechanism, and
can prevent packet loss with IEEE 802.3x Flow Control (Full-
Duplex) and Back Pressure (Half-Duplex).

7
Via the build-in DIP-switch, the GT-1205A can be congured as
3-Port Ethernet switch or 2-Port Redundant media converter.
With the 3-Port Switch mode, it can operate Store-and-Forward
mechanism with high performance, with the 2-Port redundant
mode, it 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 link down,
it forwards the packet to the other port of the backup pair.
As the GT-1205A Media Converter fully complies with IEEE
802.3 10Base-T, IEEE 802.3u 100Base-TX, IEEE 802.3ab
1000Base-T and IEEE 802.3z 1000Base-LX / SX, the Gigabit
media conversion installation is quite quick and easy by simple
plugging and playing feature.
With 1000Base-SX / LX SFP ports, the GT-1205A is with high
reliability and exibility to extend the distance up to 550m,
10km, or longer. It depends on the 1000Base-SX / LX SFP
transceiver modules.
1.3 Product Features
Standard
Comply with IEEE 802.3 10Base-Tl
Comply with IEEE 802.3u 100Base-TXl
Comply with IEEE 802.3ab 1000Base-Tl
Comply with IEEE 802.3z 1000Base-SX / LXl
IEEE 802.3x Full-Duplex Flow-Control, Back-Pressure in Half-l
Duplex eliminate packets loss
Interface
Dual 1000Base-SX / LX SFP Fiber-Optic Slotsl
One 10/100/1000Base-T Copper, auto MDI/MDIX functionl
Auto-Negotiation for 10/100/1000Base-T; Half-duplex or Full-l

8
duplex for 10Mbps and 100Mbps, full-duplex for 1000Mbps
Supports maximum frame size up to 1522 bytesl
IEEE 802.1Q Tag VLAN Transparent, Multicast pass throughl
Redundancy
Link status auto-detect and redundant on Dual ports withl
same connector type
Only Primary-Port is active at a time, the Backup-Port isl
blocked
While Primary-Port link fail occurrences, the trafc swaps to l
Backup-Port automatically
Once the Primary-Port status backs to link up, the trafc l
swaps from Backup-Port to Primary-Port
Hardware ber port redundantl
Mechanical
External 5V / 2A DC power supplyl
LED indicators for easy network diagnosel
DIP Switch for 3-Port operation with Gigabit Switch mode orl
Redundant mode
Compact in size, easy installationl
Can be installed on PLANET’s 10”/19” Media Converter Chassisl
(MC-700/1500/1500R/1500R48)
Wall mounting and DIN-Rail Supportedl

9
1.4 ProductSpecication
Model GT-1205A
Hardware Specication
Hardware Version 2
Ports
Copper 1 x 10/100/1000Base-T port
Fiber 2 x 1000Base-X SFP slots
Cable
Twisted-Pair
10Base-T: 2-Pair UTP CAT. 3,4,5, up to
100 meters
100Base-TX: 2-Pair UTP CAT. 5, 5e up to
100 meters
1000Base-T: 4-Pair UTP CAT. 5e,6 up to
100 meters
Fiber-Optic
Cable
50/125μm or 62.5/125μm multi-mode
ber cable, up to 220 & 550 meters
9/125μm single-mode cable,
provide long distance for
10/15/20/30/40/50/60/70/120km or
longer (vary on SFP module)
LED Display
System: One Power LED (Green)
Fiber Port: Two LNK/ACT LED (Green)
TP Port : One Speed LED (Green), One
LNK/ACT LED (Orange)
Switch Processing
Scheme Store and Forward
Fabric 6Gbps
Throughput
(packet per second) 4.4pps

10
Maximum Packet
Size 1522 Bytes
Flow Control Back pressure for Half-Duplex. IEEE
802.3x Pause Frame for Full-Duplex
Power Requirement 5V DC, 2A max.
Power Consumption 5.4 Watts / 18.5 BTU per hour max.
Dimension
(W x D x H) 94 x 70 x 26mm
Weight 191g (device only)
Standard Conformance
EMI Safety FCC Class B, CE
Operating
environment 0 ~ 50 Degree C
Storage
environment -10 ~ 70 Degree C
Operating Humidity 5 ~ 95%, Relative Humidity,
non-condensing
Storage Humidity 5 ~ 95%, Relative Humidity,
non-condensing
Standard
Compliance
IEEE 802.3
IEEE 802.3u
IEEE 802.3ab
IEEE 802.3z
IEEE 802.3x
10Base-T
100Base-TX
1000Base-T
1000Base-SX/LX
Flow Control

11
2.Hardware Description
This product provides three different running speeds – 10Mbps,
100Mbps and 1000Mbps in the same Gigabit Media Converter
and automatically distinguishes the speed of incoming
connection.
This section describes the functionalities of GT-1205A’s
components and guides how to install it on the desktop or shelf.
Basic knowledge of networking is assumed. Please read this
chapter completely before continuing.
2.1 Product Outlook
The GT-1205A overview showed as below:
3-Port Media Converter
10/100/1000Base-T to Dual 1000Base-X SFP
1000
1
1
22
3
PWR LNK/
ACT
10/100/1000Base-T to Dual 1000Base-X SFP
5V DC
Rear Panel Front Panel
TOP Panel Bottom
Figure 2-1-1: GT-1205A Overview

12
2.2 Front Panel
The Front Panel of the Gigabit Media Converter consists of two
1000Base-X SFP slots and one Auto-Sensing 10/100/1000Mbps
Ethernet RJ-45 Port. Figure 2-2-1 shows a front panel of Gigabit
Media Converter.
1000
1
1
22
3
PWR LNK/
ACT
10/100/1000Base-T to Dual 1000Base-X SFP
Figure 2-2-1: GT-1205A Front Panel
2.2.1 LED Indicators
System
LED Color Function
PWR Green Lit: Power on.
1000Base-SX/LX SFP Slots
LED Color Function
1Green
Lit Indicate that the ber optical port is
link up.
Blink Indicate that the converter is actively
sending or receiving data over that port.
Off Indicate that the ber optical port is
link down.
2Green
Lit Indicate that the ber optical port is
link up.
Blink Indicate that the converter is actively
sending or receiving data over that port.
Off Indicate that the ber optical port is
link down.

13
10/100/1000Base-T Port
LED Color Function
LNK/ACT Orange
Lit Indicate that the copper port is
link up.
Blink
Indicate that the converter is
actively sending or receiving data
over that port.
Off Indicate that the copper port is link
down.
1000 Green
Lit Indicate that the copper port is
operating at 1000Mbps.
Off Indicate that the copper port is
link down or 10/100Mbps.
2.3 Rear Panel
The rear panel of the Gigabit Media Converter indicates one DC
jack, which accepts input power with 5V DC 2A.
5V DC
Figure 2-3-1: One DC jack for DC power input
Power Notice:
Power Information: the power jack of GT-1205A is with
2.5mm in the central post and required +5VDC power input.
It will conform to the bundled AC-DC adapter and Planet’s
Media Chassis. Should you have the issue to make the power
connection, please contact your local sales representative.

14
Please keep the AC-DC adapter as spare parts when your
GT-1205A is installed to a Media Chassis.
2.5mm
DC Receptacle 2.5mm
+5V for each slot
DC receptacle is 2.5mm wide that conforms to and matches
the Gigabit Media Converter 2.5mm DC jack’s central post.
Do not install any improper unit, model of the Gigabit Media
Converter.
The device is a power-required device, it means, it will not work
till it is powered. If your networks should 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 area, installing a surge suppression device may
also help to protect your Gigabit Media Converter from being
damaged by unregulated surge or current to the converter or
the power adapter.
2.4 Side View
The side panel of the Gigabit Media Converter indicates One DIP
switch for set 3-Port switch mode or 2-Port Redundant mode,
“ON” for operate at 2-Port Redundant mode. And “OFF” to
operate at 3-Port switch mode.
OFF ON
Redundant
3-Port Switch OFF
2-Port Redundant ON
Figure 2-4-1: GT-1205A Side Panel

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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 link
down, it forwards the packet to the other port of the backup
pair. The following gure shows the redundant function.
Figure 2-4-2: Redundancy Behavior Topology
Link status auto detect and redundant on Dual ports withl
same connector type.
Only Primary-Port is active at a time, the Backup-Port isl
blocked.
While Primary-Port link fail occur, the trafc swap to Backup-l
Port automatically.
Once the Primary-Port status back to link up, the trafc swap l
from Backup-Port to Primary-Port.

16
2.5 Install the Media Converter
This section describes how to install your Gigabit Media
Converter and make connections to the Gigabit Media Converter.
Please read the following topics and perform the procedures in
the order being presented. The hardware installation of Gigabit
Media Converter do not need software conguration. To install
your Gigabit Media Converter on a desktop or shelf, simply
complete the following steps.
2.5.1 Stand-alone Installation
The GT-1205A is with high reliability and exibility to extend the
distance up to 550m and 10/15/20/30/40/50/60/70/120km. It
depends on the 1000Base-SX / LX SFP transceiver modules, the
SFP transceiver is hot-pluggable and hot-swappable. You can
plug-in and out the transceiver to / from any SFP port without
having to power down the Gigabit Media Converter.
To install a GT-1205A stand-alone, on a desktop or shelf, simply
complete the following steps:
Step 1: Turn off 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: Slot in the 1000Base-X SFP module. Make sure both
side of the SFP transceiver are with the same media
type, for example: 1000Base-SX / 550m multi-mode
to 1000Base-SX / 550m multi-mode, 1000Bas-LX
/ 10km single mode to 1000Base-LX / 10km single
mode.

17
1000Base-X
LC Fiber 1000Base-X
LC Fiber
1000Base-X
SFP Transceiver
5V DC power
10/100/1000Base-T
UTP
Figure 2-5-1: GT-1205A Gigabit Media Converter Stand Alone Installation
Step 4: Connect the ber cable. Attach the duplex LC connector
on the network cable into the SFP transceiver.
Step 5: Attach ber cable from the GT-1205A to the ber
network. TX, RX must be paired at both ends.
Step 6: Connect the 5V DC power adapter to the GT-1205A
and verify that the Power LED lights up.
Step 7: Turn on the power of the device/station; the LINK
LED should light when all cables are well attached.
Note
1. It is recommends using PLANET MGB series
SFP modules for the Gigabit Media Converter.
If you insert a SFP transceiver that is not
supported, the Gigabit Media Converter will not
recognize it. Please check appendix or go visit
our WEB site for details specification informa-
tion. http://www.planet.com.tw
2. To prevent from optic acceptor malfunction,
check the both wires / transmitter before power
on the converter.
3. To remove the SFP module, please remove the
fiber connectors in advanced and push the belt
or letch of the module. Pull out the module
with violent may damage the module and the
Gigabit Media Converter.

18
Approved PLANET SFP Transceivers
The GT-1205A Gigabit Media Converter supports both Single
mode and Multi-mode SFP transceiver. The following list of
approved PLANET SFP transceivers is correct at the time of
publication:
Gigabit SFP Transceiver Modules
MGB-GT SFP-Port 1000Base-T module
MGB-SX SFP-Port 1000Base-SX mini-GBIC module
MGB-LX SFP-Port 1000Base-LX mini-GBIC module
MGB-L30 SFP-Port 1000Base-LX mini-GBIC module -30KM
MGB-L50 SFP-Port 1000Base-LX mini-GBIC module -50KM
MGB-L70 SFP-Port 1000Base-LX mini-GBIC module -70KM
MGB-L120 SFP-Port 1000Base-LX mini-GBIC module -120KM
MGB-LA10 SFP-Port 1000Base-LX (WDM, TX:1310nm) -10KM
MGB-LB10 SFP-Port 1000Base-LX (WDM, TX:1550nm) -10KM
MGB-LA20 SFP-Port 1000Base-LX (WDM, TX:1310nm) -20KM
MGB-LB20 SFP-Port 1000Base-LX (WDM, TX:1550nm) -20KM
MGB-LA40 SFP-Port 1000Base-LX (WDM, TX:1310nm) -40KM
MGB-LB40 SFP-Port 1000Base-LX (WDM, TX:1550nm) -40KM
2.5.2 Media Chassis Installation
To install the Gigabit Media Converter in a 10-inch or 19-inch
with standard rack, follow the instructions described below.
Step 1: Place your Gigabit Media Converter on a hard at
surface, with the front panel positioned towards your
front side.
Step 2: Carefully slide in the module until it is fully and rmly
tted into the slot of the chassis, the Power LED of
the Gigabit Media Converter will turns ON.

19
Figure 2-5-2: Insert a Gigabit Media Converter into an available slot
Caution
1. Never push the converter into the slot with
violent, it could damage the chassis.
2. The Media Converter Chassis supports hot-
swap; there is no need to turn off the whole
chassis before slide in the new converter.
2.5.3 Optional DIN-Rail Installation
There are two DIN-Rail holes on the left side of the GT-1205A
that allows it can be easily installed with DIN-Rail mounting. The
PLANET optional DIN-Rail mounting Kit – RKE-DIN can be order
separately. When need to replace the wall mount application
with DIN-Rail application on the GT-1205A, please refer to
following gures to screw the DIN-Rail on the GT-1205A. To
hang the GT-1205A, follow the below steps:
Step 1: screw the DIN-Rail on the GT-1205A

20
Step 2: Lightly press push the DIN-Rail into the track.
Step 3: Check the DIN-Rail is tightly on the track.
You must use the screws supplied with the
mounting brackets. Damage caused to the parts
by using incorrect screws would invalidate your
warranty.