“Wires-only” VDSL2 Modem Test Plan - NICC

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NICC ND 1436 V1.1.2 (2013-09)
The details of the various tests are defined in the following sub-sections.
B.1.2.7 Initial Gating Tests
The purpose of these tests is to check that the CPE modem can synchronise with a NGA field
configuration and will not cause network harm. It is necessary for a CPE modem to “Pass” both of
these tests before full SIN 498 testing can commence. If either of these tests results in a “Fail”, the
CPE modem provider will be informed by Openreach and asked to resolve the issue.
B.1.2.7.1 Synchronisation
Description – The CPE modem shall achieve synchronisation to a reference NGA DSLAM and can
achieve end-to-end-connectivity with an external server.
Test Procedure – Connect the CPE modem to a port on the DSLAM via a 100m length of
simulated TP-100 gauge cable and ensure that it trains up and reaches synchronisation. Following
this, attempt to set up an end-to-end connection between a PC connected to the CPE modem and
an external server.
Server
BRAS
DSLAM
Line Simulator
CPE
PC
EMS PC
PC
Figure B.3 : Test Configuration for Checking Basic Synchronisation
1) Configure the DSLAM to implement an ESEL value of 30dB and ensure that the default band
profile is loaded onto a port.
2) Set the Line Simulator to a loop length of 100m of TP-100 cable with noise injection disabled
(i.e. noise free)
3) Connect the CPE modem to that port and check that it reaches synchronisation within 60
seconds.
4) If synchronisation is attained, check that the CPE modem stays in synchronisation for a
minimum of 120 seconds.
5) Check that end-to-end connectivity has been achieved by launching an Internet session
using the PC connected to the CPE modem. This will confirm whether the modem has
established a DHCP or PPP session with the server.
NICC Standards Limited