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Thank you for buying our YC-201 VDSL Modem.
Before using it, please read carefully this user’s manual to use superhighway Internet service effectively.
CLASS B
This equipment, as EMI compatible equipment for home use, can be utilized at all areas including residential
areas.
Before You Begin
This manual is intended for general users of YC-201 VDSL Modem.
This manual describes the introduction and installation of YC-201 VDSL Modem, network connection,
Internet access over IP, and troubleshooting).
Not only the first users of VDSL modem such as YC-201 VDSL Modem but also those that much handled
products similar to it must carefully read the contents of this manual before installing and using YC-201
VDSL Modem.
If there occurs any problem in the course of using YC-201 VDSL Modem including product damage, please
report the fact to VDSL service provider.
Organization
Each chapter of YC-201 VDSL Modem User’s Manual describes:
A Chapter 1 ‘Introduction’ introduces the main function of YC-201 VDSL Modem and the method of
using it and describes hardware configuration and specifications.
B Chapter 2 ‘Before You Begin’ describes matters that users should be well aware of before installing
YC-201 VDSL Modem.
C Chapter 3 ‘Installing YC-201 VDSL Modem’ introduces environment where YC-201 VDSL Modem
can be installed, and describes the method of actually installing products and connecting it to network.
D Chapter 4 ‘Accessing the Internet via YC-201 VDSL Modem’ describes the method of installing and
deleting emulator and accessing and disconnecting network at each PC that uses Windows 95, 98,
2000, NT as operating system.
E Appendix A ‘Troubleshooting’ presents problems that could occur upon use of YC-201 VDSL Modem
and the troubleshooting.
F Appendix B ‘Windows 95/98 Telephone Access Networking error Code’ describes the code of errors
that could occur in attempting telephone access networking in Windows 95 and 98, their meaning, and
solutions of them.
G Appendix D ‘Terminology’ describes useful terms in using YC-201 VDSL Modem.
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CAUTION Appendix A is used when installation personnel or maintenance personnel of Korea Telecom, a VDSL
service provider, install the products and maintain them. Therefore, general users should not refer to
these contents to perform jobs, preventing problems from occurring in the products.
NOTE : FCC
This equipment has been tested and found to comply with the limits for a Class B digital device, Pursuant to Part 15 of the FCC
rules.
These limits are designed to provide reasonable protection against harmful interface in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following
Measures:
--Reorient or relocate the receiving antenna.
--Increase the separation between the equipment and receiver.
--Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
--Consult the dealer or an experienced radio/TV technician for help.
CAUTION: Changes or modifications not expressly approved by the manufacturer responsible for compliance could
void the user’s authority to operate the equipment
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1 Introduction of YC-201 VDSL modem......................................................................................................................7
2 Name and function of YC-201 VDSL........................................................................................................................8
2 Before installation...................................................................................................................................................12
2 Unpacking and checking the contents ......................................................................................................................15
Chapter 4Internet Access via YC-201 VDSL Modem..............................................................................................................22
1 Checkup before YC-201 VDSL Modem installation.................................................................................................23
2 About YC-201 VDSL Modem.................................................................................................................................28
3 System Specifications for YC-201 VDSL Modem Installation.................................................................................. 28
5 Internet Access........................................................................................................................................................30
6 Internet Disconnection............................................................................................................................................. 31
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Chapter 1 Introduction
VDSL : Very High-bit rate Digital Subscriber Line
Through this technology, an operator offers multi-megabyte service to subscribers by existing copper-fiber
infrastructure, and current VDSL modem provides the following according to the length of lines and modem
configuration.
Speed
Transmission Distance
Upload
Download
Symmetric Asymmetric
10~13Mbps 13Mbps
10~13Mbps 52Mbps
0~1.5Km 0~4.5Km
<Table 1> YC-201 VDSL Modem Speed and Transmission Distance
Further, it is so designed as to enable optimum service within transmission distance of 1.2Km via telephone
line, and VDSL was configured in hybrid. It uses fiber from central office (switch) to street curb or
ONU(Optical Network Unit) of apartment and building, and utilizes existing telephone line to the extent of
indoor subscriber device.
<Figure 1> VDSL Service Network Configuration Diagram
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This chapter introduces the main function of YC-201 VDSL modem and the method of using it, and
describes HW configuration and specifications. The organization of this chapter is as follows:
1. Introduction of YC-201 VDSL modem
2. Name and function of each part
3. YC-201 VDSL modem specifications
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1 Introduction of YC-201 VDSL modem
<Figure 2 > YC-201 VDSL Modem
With YC-201 VDSL modem, you can connect PC to the Internet or other multimedia service network by
using existing PSTN.
YC-201 VDSL modem provides superhighway access and enables use of telephone during its use unlike
existing dial-up modem.
YC-201 VDSL modem provides the following functions:
A Various Applications
Ÿ YC-201 VDSL modem provides various VDSL applications such as Internet access, interactive
communication, e-mail, file transfer, data download and upload, etc.
B Powerful network management function
Ÿ YC-201 VDSL modem is a terminal and interworks with the host of the district central office.
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Therefore, the central office can offer subscriber network management service.
C Easy installation
Ÿ YC-201 VDSL modem is easy to install and general users can easily access ISP and get Internet
service.
D Management function of web environment
Ÿ YC-201 VDSL Modem enables direct Internet connection, monitors the operation of the modem
via serial port and telnet and can change setup.
2 Name and function of YC-201 VDSL
¨é
DATA LED
¨è VDSL LED
¨ç POWER LED
<Figure 3> Front View of YC-201 VDSL Modem
Location
¨ç
¨è
¨é
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Label Color Function
POWER Green On while AC power is normally input.
VDSL Green On while VDSL host of central office is connected.
DATA Green Blink while sending and receiving data with VDSL host of central office.
<Table 1> Function of each LED of YC-201 VDSL modem
LAN PORT
DC 5V PORT
<Figure 4> Rear View of YC-201 VDSL Modem
Location Label Port Function
Left LAN LAN port
Center DC 5V Power input port
Right LINE VDSL line port
Right PHONE Phone port Connects to phones.
<Table 2> Function of YC-201 VDSL Modem Port
This port uses UTP Category-3, 4, 5 Straight-through cable to
connect to LAN card of PC. It supports a speed of 10/100Mbps.
Connects power (AC 110V/220V, DC5V Adaptor) to VDSL
modem.
From phone socket installed on the wall, RJ-11 phone cable is
connected, and VDSL data are input or output.
LINE, PHONE PORT
3 YC-201 VDSL Modem Specifications
Item Specifications
Product spec.
Operating
temperature
Power
Applied standards
Frequency band used
Modulation method
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Size: 108.00(width) * 140.00(length) * 32.35(height) mm
Weight: 1.2Kg(modem, power supply device, and cable included)
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Chapter 2 Before Installation
This chapter describes matters that users should be full aware of before installing the product. Before you
install the product, you must read the contents of this chapter, and should install the product always in
consideration of the contents of this chapter.
The organization of this chapter is as follows:
1. Safety checkup
2. Before installation
3. Cable preparation
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1 Safety checkup
When installing or using YC-201 VDSL Modem, you must check up the following matters:
A Safety checkup related to electricity
Ÿ Users should not directly remove/attach or disassemble/assemble the cover of the product. In
particular, if you do so while the power is On, it might be dangerous.
- Check whether there is a possibility of danger at the installation space. Be sure to check if there
are wet floor or ungrounded power extension cable, worn-out power code, ungrounded floor, etc.
B Installation space checkup
Ÿ Electronic goods generate heat in operation. If the installation place does not allow appropriate
air circulation, the product may not normally operate due to generated heat. Check whether air
circulation of the installation place is well done.
Ÿ Check if power supplied to the installation place is clean. If power with lots of spark or noise is
supplied, power adjustment device should be installed.
2 Before installation
Before installing YC-201 VDSL Modem, check up the following matters:
A Telephone network service
Ÿ YC-201 VDSL Modem should be installed at places to which telephone network service is
offered.
- For subscribers using the current phone, they can use the phone line as it is, and if there is
no phone line used, you should have new phone line installed at the district central office.
Ÿ Phone network service should support YC-201 VDSL Modem connection.
B Not all phone network services provide VDSL application to subscribers. By asking if the district
central office offers such services in advance, subscribe to VDSL service at your local central office.
C PC specification check
Ÿ To have YC-201 VDSL Modem connected to PC, first, PC should have LAN card
(10/100Base-T) installed. LAN card can be purchased at your PC distributor.
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3 Cable Preparation
A Before network connection, first, prepare cables to be used upon network access. Upon connection of
YC-201 VDSL Modem to the network, the following types of cables are necessary for each port.
Port Cables used
Phone line port (PHONE)
LAN port(10/100Base-T)
B RJ-11 phone cable: Connect one side of RJ-11 phone cable to phone line port (PHONE) at the back
side of YC-201 VDSL Modem and connect other side to phone. Also, connect phone line from
existing wall to VDSL LINE Port.
C RJ-45 UTP LAN cable: Connect one jack of RJ-45 UTP LAN cable to LAN port (10/100Base-T) at
the back of YC-201 VDSL Modem and connect other jack to LAN card of PC.
CAUTION Although cables look same, the type of cables and internal pin connection can be different. Therefore,
you must attach a label to cables together used with YC-201 VDSL Modem to avoid them to be mixed
with those used by other products.
One RJ-11 phone cable
RJ-45 UTP Category-3,4,5 Straight-through cable
<Table 4> Cables used for YC-201 VDSL Modem
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Chapter 3 Installing YC-201 VDSL Modem
This chapter introduces environment where YC-201 VDSL Modem is to be installed and describes the
method of actually installing the product and connecting it to the network.
The organization of this chapter is as follows:
1. Installation environment
2. Unpacking and checking the contents
3. Modem installation
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1 Installation environment
Let’s see installation environment to be set up in order to safely install and use YC-201 VDSL Modem.
A YC-201 VDSL Modem should have constant temperature and humidity and the environment scope is
as follows:
Ÿ Operating temperature: within 0~50 °C
Ÿ Relative humidity: 10% ~ 90%(upon non-condensation)
Ÿ Power consumption: 2 Watts(max.)
Ÿ Input voltage: AC 110/220V, DC 5V
Ÿ Frequency: 50/60Hz
CAUTION In case of input voltage upon system operation, voltage variation range should be within 5% of the
regulated voltage, and power outlet must be grounded. Do not use electric appliances such as hair dryer,
iron, refrigerator, etc. together with the outlet of the power connector of YC-201 VDSL Modem. For
stable power supply, use AVR(Automatic Voltage Regulator).
2 Unpacking and checking the contents
After purchasing YC-201 VDSL Modem package, unpack it and check if the following contents are all
included.
A 1 set of YC-201 VDSL Modem
B 1 copy of User’s Manual
C 1EA of RJ-45 UTP Ethernet Cable
D 1EA of RJ-11 Phone Cable
E 1EA of Power Adaptor or Power Cable
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