“Wires-only” VDSL2 Modem Test Plan - NICC

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NICC ND 1436 V1.1.2 (2013-09)
Deployment Scenario 2 : Microfilter with home wiring
Description – This test gives an indication of how a CPE modem would perform if connected to the
Openreach NGA network as part of a microfilter based deployment (i.e. with home wiring).
Comparing the results against those obtained from the previous deployment scenario will give an
indication on how the CPE performance is affected by bridged taps caused by telephony
extensions in the customer’s premise. In this configuration, the three lengths of cable (7m, 12m
and 20m) connected to the NTE5 (the demarcation point in the customer’s premise where the
Openreach network terminates) are representative of telephony wiring extensions and are
specifically chosen to introduce notches in the VDSL downstream and upstream frequency bands.
Testing should be performed using both FAST and INTERLEAVED operation.
Test Description (FAST) –
1) Configure the DSLAM to implement a CAL value of 30dB and the default band profile.
2) Connect the CPE modem to the DSLAM using the test setup shown in Figure B.10.
3) Set the line simulator to a loop length of 200m of TP-100 cable with the appropriate
crosstalk injected at each end of the system.
4) Record time taken for the CPE to attained synchronisation. This shall be