50M VDSL DSLAM As the same principle with the ADSL, it support maximum speed of 52Mbps for download which occupies the most Internet service and maximum 2.3Mbps for upload. It is the fastest among the xDSLs. Also, it has the multicasting function which transmit the data requested by the receiver and support Internet environment such as VOD and Internet broadcasting. Characteristics - Upload : 1.5 ~ 2.3Mbps - Download : 13 ~ 52Mbps - It can transmit data more rapidly than the ADSL at the shorter range (within 300m : Max 52Mbps,     within 1500m : Max 13Mbps) - Data transmission is programmable as symmetric or asymmetric (Max distance of the symmetric     type : 1350m, asymmetric type : 2500m) - Not being interfered by the service environment of the existing POTS, ISDN and ADSL, etc - Can be used together with the ISDN since it does not overlap with the frequency area of the     ISDN -  Pursue complete service network and ATM network structure -  VDSL modem can be connected at the same line, same as expanding and adding the voice     telephone line Key Features & Functions - Internet access solution with superior speed and capacity - Data / Voice transmission through telephone line - Stable operation for Data and Voice independently -  Maximum Bandwidth through reduction of unnecessary Broadcast - Meet subscriber's requirement under various service environment - 19 inch rack frame integrated with Switch - Port-Based VLAN / Tagged VLAN (IEEE 802.1q) - Support Spanning Tree Protocol (IEEE 802.1d) - MAC filtering, DHCP filtering, NetBEUI/NetBIOS/NBT filtering - IP Multicasting : IGMP Snooping / IP Multicast - Supports for QoS : Standard IEEE 802.1p protocol - Efficient network management system provide with SNMP V1/V2 - Easy to use management tools : CLI, FTP, TFTP, Telnet, SNMP based EMS - Control management and Data stacking through one IP - VDSL line link status / speed - Link status / speed for CPE and subscriber's PC - Factory default setting per subscriber's port - System configuration information backup and loading Specification - System Architecture Data Transmission speed : 12.5Mbps Data Transmission reach : 1Km at 24 AWG QAM Modulation BAND : 4 Band (U0, D1, U1, D2) 1U size, 19 inch rack mounted - Physical Dimensions 381mm(W) X 43mm(H) X 478mm(D) including FAN -Environmental Conditions Input Voltage & Frequency : 110/220 VAC / 50 ~ 60Hz Power Consumption : 20W Operation Temperature : 0°C ~ 50°C Operation Humidity : 10% ~ 90% - Interface LAN Interface : 10/100 Base-Tx Switch 4 Ports (RJ-45) VDSL / POTS Interface : 16 ports for subscribers (RJ-11) EMS Management : 10/100 Base-TX (RJ 45) Console : RS-232C Serial Port (RJ-45)       - Software IEEE Standards IEEE 802.3/3u 10Base-T/100Base-Tx IEEE 802.3x Flow Control IEEE 802.1d Spanning Tree Protocol IEEE 802.1p Priority IEEE 802.1q tagged VLAN IEEE 802.1ad Link Aggregation IETF Standards RFC 768 UDP RFC 791 IP RFC 792 ICMP RFC 826 ARP RFC 1541 DHCP RFC 2236 IGMP V2 Management RFC 783 TFTP RFC 854 Telnet RFC 1157 SNMP V1/V2 RFC 1213 MIB I / II Provides SNMP V1/V2 MIB Remote software upgrade using FTP/TFTP Remote access list for Alarm and System status using Telnet Management and Control using Console System Management and Control using EMS Supports for system log file

Headquarter(Manufacturing Factory) 68-4, Shinchon-Ri, Kyoha-Eup, Paju-City, Gyunggi-Do 413-832, Korea TEL : +82-31-943-8525(Rep.) FAX:+82-31-943-8527 Homepage:www.sunmyung.com Sales Dept. & R&D center LAGO-PLAZA 8F, 857-1, Janghang-Dong, Iisan-Gu, Goyang-City, Gyunggi-Do 411-837, Korea TEL : +82-31-908-8700(Rep.) FAX:+82-31-908-9600 E-mail: sun2006@sunmyung.com .