Introduction – NetComm NCT240 User Manual

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NetComm NCT240 Installation Guide Release 1.0

1. Introduction

This document is intended for First Office Acceptance test plan for NetComm’s ADSL2+

Broadband Access Switch solution (BAS). The Netcomm NCT240 Broadband Access Switch
contains 24 ADSL2/2+ circuits to deliver high-speed data, video and voice service over traditional

twisted copper pairs by using DSL technology.

To meet the increasing demand for high-speed internet access and triple play application
services. The next generation network offers a feasible functionality of integrated services with

the most cost effective architecture. Next generation broadband access networks are designed
to provide rich video contents, DSL, POTS and VoIP services over traditional copper wire

infrastructure. These types of services will be supported on NGN architecture simultaneously.
DSL is used as the data service platform for traditional POTS technology which is used for voice

services. The multimedia and local content-rich applications can also be easily implemented on
this NGN architecture.

xDSL (Digital Subscriber Line) is a technology for delivering high-bandwidth information over

copper telephone lines. xDSL service can deliver POTS and high date rate services simultaneously
over a single twisted-wire pair. The POTS and data service are simultaneous and independent;

the xDSL data service does not affect the POTS service. xDSL uses the bandwidth above the 4-kHz
POTS frequency to transmit duplex data using digital modulation techniques from the C.O side to
the Customer Premises Equipment (CPE).

ADSL is a form of xDSL service that delivers an asymmetric data rate over a twisted copper pair.

ADSL delivers a higher rate downstream, towards the customer premises and lower rate
upstream, from the customer premises. ITU standard compliant Full-Rate ADSL2+ can deliver

data rates up to 25 Mbps downstream and 1 Mbps upstream; Full-Rate ADSL can deliver data rates
up to 8 Mbps downstream and 800 kbps upstream; G.Lite ADSL can deliver up to 1.5 Mbps

downstream and 512 kbps upstream. The actual data rate depends on the length, gauge, and
condition of the twisted-wire pair, the bandwidth of the uplink depends on the data network,

and the capacity of the network service provider.

Digital Subscriber Line (DSL) dominates broadband market. The position of national telecom
operators in most countries has given the advantage in reaching out to customers with

broadband services over DSL.

The NCT240 Access system contains 24 ADSL2/2+ circuits to deliver high-speed data service over
twisted copper pairs using industry standard Discrete Multi-Tone (DMT) line coding technology.

The NCT240 complies with full-rate ADSL in accordance with ANSI T1.413 Issue 2, ITU-T G.992.1
(G.dmt), ITU-T G.992.2 (G.lite)ITU-T G.992.3 (ADSL2) and ITU G.992.5 (G.ADSL2+) protocols.

The NCT240 greatly expand broadband capabilities in the access network, enhancing the

infrastructure for emerging services. With simple in-service upgrades, service providers obtain
the capacity and Quality of Service (QoS) to support larger populations of narrowband and
broadband users. For management, NCT240 can be easily configured by SNMP, Telnet, SSH, HTTP,

HTTPS and RS-232 console.