User's Manual

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| Copyright |

ⓒ

No part of this book shall be reproduced, stored in a

retrieval system, or transmitted by any means, electronic,

mechanical, photocopying, recording, or otherwise,

without written permission from the publisher.

The specifications and information regarding the products

in this manual are subject to changed without notice.

| Trademark Credit |

Corecess 3121 is registered trademark of Corecess Inc.

Windows is registered trademark of Microsoft Corp.

Corecess Inc.

500-2, Sangdaewon-dong, Jungwon-ku, Sungnam-city,

Kyungki-do, Korea, 462-120

TEL: +82-31-739-6600 FAX: +82-31-739-6622

http://www.corecess.com



| FCC Part 15 Notice |



NOTE: 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 pro-vide reasonable 

protection against harmful interference in a residential installation.

This equipment generates, uses and can radiate radio frequency 

energy and, if not in-stalled 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.



Summary of content (15 pages)

PAGE 1
| FCC Part 15 Notice | NOTE: 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 pro-vide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not in-stalled and used in accordance with the instructions, may cause harmful interference to radio communications.
PAGE 2
Using This Document Thank you for using the product of Corecess. This manual will show you how to set up the Corecess 3121 ADSL modem, and how to customize its configuration to get the most out of your new product. This user manual uses the following conventions: Note: Int roduces usef ul it em f or t he use of product , ref erence, and it s relat ed mat erials.
PAGE 3
Introduction The Corecess 3121 is an Asymmetric Digital Subscriber Line (ADSL) modem used for home connectivity to an ADSL service provider network. The Corecess 3121 ADSL modem receives adaptive data rates of up to 24Mbps downstream and transmits 1Mbps upstream. Key Feat ures The Corecess 3121 ADSL modem provides the following key features: y Internal ADSL modem for high-speed Internet access. y 10/100Base-T Ethernet router to provide Internet connectivity to all computers on your LAN.
PAGE 4
Getting to Know the Corecess 3121 Unpacking t he Box Check the shipping carton carefully to ensure that the contents include the items you ordered.
PAGE 5
Front Panel The front panel contains lights called LEDs that indicate the status of the unit. R PW T AC N LA Label Color PWR Green On Off DSL Green On : ADSL link is established and active. Blinking : ADSL link is training. Off : No ADSL link. ACT Green Blinking : ADSL data is sending/receiving through the port. Off : No ADSL data. Green On : LAN link is established and active. Blinking : Ethernet data is sending/receiving through the port. Off : No LAN link.
PAGE 6
Rear Panel The rear panel contains the ports for the unit’s data and power connections. OFF ON 5V DC Label OFF/ON 5V DC CONSOL LAN CONSOL LAN PHONE LINE Function Switches the unit on or off. Connects to the supplied power converter cable. Connects the device to a console terminal. Connects the device to your PC’s Ethernet port, or to the uplink port on your LAN’s hub, using the cable provided. PHONE Connects the device to a telephone jack for DSL communication.
PAGE 7
Connecting Hardware The Corecess 3121 supports both the POTS splitter and micro-filter phone configurations. Before cabling the Corecess 3121, verify your configuration with your service provider. This section describes how to connect the Corecess 3121 to the phone jack, the power outlet, and your computer or network. The following figure illustrates the hardware connections. The layout of the ports on your device may vary from the layout shown. Refer to the steps that follow for specific instructions.
PAGE 8
Connect ing Telephone/ADSL Line n Connect the provided ADSL cable to the PHONE port of the Corecess 3121 and a telephone. n o Unplug the telephone line from the telephone OFF ON 5V DC CONS OL LAN PHON E and plug the line to the LINE port of the Corecess LINE o 3121. Connect ing PC Connect the provided Ethernet cable to the LAN port OFF ON of the Corecess 3121 and then connect the other end 5V DC CONS OL LAN PHON E LINE of the cable to Et hernet port on the NIC installed to your PC.
PAGE 9
Connect ing Pow er Caution: You must use t he pow er adapt er provided w it h t he Corecess 3121. n Connect the provided power supply cable into the 5V DC port of the Corecess 3121. OFF ON o Connect the provided power cord to the 5V DC CONS OL LAN PHON E LINE power supply and connect the other end of the cord to an appropriate electrical outlet. Caution: You must power on t he Corecess 3121 bef ore powering on your PC. If you pow er on your PC f irst , PC’s IP address may not be properly assigned.
PAGE 10
Configuring Your Computers This section provides instructions for configuring the Internet settings on your computers to work with the Corecess 3121. Bef ore you begin By default, the Corecess 3121 automatically assigns all required Internet settings to your PCs. You need only to configure the PCs to accept the information when it is assigned. Follow the instructions that correspond to the operating system installed on your PC.
PAGE 11
Window s 2000/NT 1. In the Windows task, click the St art button, point to Set t ings, and then click Net w ork and Dial-up Connect ions. (Figure 1) 2. Right-click the Local Area Connect ion icon at the windows and then select Figure 1 Propert ies. (Figure 2) 3. In the dialog box, select Int ernet Prot ocol (TCP/IP), and then click . (Figure 3) Figure 2 4.
PAGE 12
Window s 95/98/ME 1. In the Windows task bar, click the St art button, point to Set t ings, and then click Cont rol Panel . (Figure 1) 2. Double-click the Net w ork icon. Figure 1 3. In the dialog box, select TCP/IP, and then click . (Figure 2) 4. In the dialog box, click the [IP Address] tab and then click the radio button labeled Obt ain an IP address aut omat ically. (Figure 3) 5. Click the [DNS Conf igurat ion] tab, and then click the radio button labeled Disable DNS.
PAGE 13
Troubleshooting If you cannot connect to ADSL network, please check the status of the LEDs on the front panel, and then ensure the following: 1. Check t he LAN LED If the LAN LED goes off, ensure that the Ethernet cable is firmly connected both to the LAN port on the Corecess 3121 and Ethernet port on the NIC installed to your PC. 2. Check t he DSL LED If the DSL LED blinks continuously and never stays solid on, ensure that the DSL cable is firmly connected to the LINE port on the Corecess 3121.
PAGE 14
p Select Ethernet adapter connected with q Click Renew All. the Corecess 3121 and click Release All . Windows 2000/NT/XP n Click the Start button and select Run. o Input cmd and press the [Ent er] key. p The DOS-prompt appears. Input ipconf ig q Input ipconf ig /renew and press [Ent er] key. /release and press [Ent er] key. 4. Rest art your PC If new IP address is not assigned properly or you cannot solve the problem, ensure that the Corecess 3121 turns on and then restart your PC.
PAGE 15
Technical Specifications Description Specification ADSL Standard Standard y T1.413i2 y ITU-T G.992.1(G.dmt) y ITU-T G.992.2(G.lite) y ITU-T G.992.3(G.dmt.bis) y ITU-T G.992.5(ADSL2+) IEEE Standard y IEEE 802.3 10Base-T y IEEE 802.