NexComm System’s NS4000 Series is a Ethernet-based SHDSL DSLAM that delivers symmetric data rate up to 4.6 Mbps using
two copper pairs and 2.3 Mbps using a
single copper pair. It is easy to install, and in
a single Rack Unit (1U) compact form factor.

The NS4000 Series is designed to provide Symmetric DSLAccess Solutions for Service Providers. Although the device takes up only a small space in a Central Office, it enables Service Providers to offer highly concentrativeBusiness DSL service.

The NS4000 Series provides broadband access solutions to deliver VoIP, Video Conferences and Data Communications over a single or multiple copper pairs.
The NS4000 Series offers Ethernet-based SHDSL leased line service with guaranteed bandwidth, QoS, security, manageability by and of Tag- based VLAN with guaranteed bandwidth is the absolute advantage of NS4000 Series.
Product Line
? NS4012G_AC: 12 ports SHDSL DSLAM with AC Power supply
? NS4012G_DC: 12 ports SHDSL DSLAM with DC Power supply
? NS4024G_AC: 24 ports SHDSL DSLAM with AC Power supply
? NS4024G_DC: 24 ports SHDSL DSLAM with DC Power supply


Features of Tag-based VLAN
? Fully complying with IEEE 802.1P/Q
? Highly sophisticated features : Forward Scheduling, Diff-Serv(L3), Discarding(RED), TCP/UDP logical port
? Traffice control for QoS demand(VoIP and video conferencing)


Advanced Remote Management
? Remote installation, operation and management from a center location. Once NBG400 Series are configured to NS4024G, NBG400 Series can be managed and monitored for operation and traffic status remotely
? Capability to download and restore the latest configuration of NBG400 Series from NS4024 by utilizing proprietary protocol without the need of IP
- Plug-and-play with auto configuration
- No truck-roll required


IP Multicast
? IGMP Snooping
? Real-time multimedia application such as video conferencing, corporate communication, distance learning, and distribution of software, stock quotes and news


Interoperable Nexpeed DSLAM Series
? A single copper-pair connectivity with 2.3Mbps
- NBG420 2-wire SHDSL Business Gateway
- NM220G SHDSL Modem
? Two copper-pair connectivity with 4.6Mbps
- NBG440 4-Wire SHDSL Business Gateway


Interoperable Nexpeed DSLAM Series
* NS4024G : 24-port SHDSL Mini-DSLAM
* NS3048 : 48-port SHDSL DSLAM
* NR104G : 4-port SHDSL iMUX Router / Concentrator
Specification

POWER REQUIREMENT
100 ~ 240VAC, 50 ~ 60Hz

MECHANICAL
Size : 432mm(W) x 361mm(D) x 44mm(H)
Weight : 5.5Kg
Mount : 19" rack mount, 1U, or desktop

ENVIRONMENT
Operating Temp. 0°C to 50°C
Storage Temp. -20°C to 70°C
Humidity 5%~95%, non-condensing

LINE INTERFACE
Uplink : Dual 10/100M Ethernet
RJ-45 connector
SHDSL : 24-port SHDSL (Compliant to ITU G.991.2)
RJ-21 connector (Telco 50 pin connector)
2000Kbps-2320Kbps at 64Kbps step
384Kbps-4608Kbps at 128Kbps step (4 wire mode)
TC-PAM modulation

CONSOLE
RS-232C
DB-9 connector

DIAGNOSTICS LEDs
Power : On / Off
SHDSL
SYNC : 24 ports
ACT : Light flashing (Tx / Rx)
Ethernet
Right Light on : 100M Ethernet
Right Light off : 10M Ethernet
Left Light on : Link on
Left Light flashing : Tx / Rx

Ethernet
Support 802.3/3u/3x
Back pressure flow control for half duplex
Flow control for full duplex (802.3x)

Bridging
32K MAC addresses
MAC address filtering
MAC address limiting
Flooding control
Spanning Tree Protocol (802.1d)*
Rapid Spanning Tree Protocol (802.1w)*
Per VLAN Spanning Tree (PVST) support*

VLAN
Port-based VLAN
IEEE 802.1Q Tag-based VLAN
No. of IEEE 802.1Q tag-based VLAN : 255
GVRP suppor*

QoS
Traffic Classification based on :
- Port based priority
- VLAN priority field in VLAN tagged frame
- DS/TOS field in IP packet
- TCP/UDP logical ports
4 priority queues with delay bounded, strict priority and WFQ service
disciplines 2 dropping precedence with WRED mechanism

IP Multicast
Support IGMP snooping*

Management
Local console
SNMP v2
Web-based management
Telnet
Automatic CPE management
- Remote Monitoring
- Remote Configuration

MIB
RFC 1213 MIB II
RFC 1493 Bridge MIB
SHDSL line MIB


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