Triple-Play Service Deployment

112
Physical Layer Test
– Foreign VAC
– Foreign VDC
– Leakage Resistance
– Opens
– Capacitive Balance
– Longitudinal Balance
– Power Influence
– Circuit Noise
– Wideband Noise
– Impulse Noise
– Load Coil
PASS
VDSL Test
– Current Bit Rate
– Max Attainable
– Relative Capacity
– Noise Margin
– Attenuation
– Line Errors
PASS
START
FAIL
FAIL
IPTV Test
– PCR Jitter
– Latency
– Continuity Error
– Transport Error
Indication
– Packet Loss
Rate
Period (Hole Size)
Distance
PASS
FAIL
COMPLETE
Chapter 4: Troubleshooting the Copper Plant for IP Services
Identify faults such as shorts, opens, grounds,
wet sections, bridged taps, more highly resistive faults,
loads, etc. Isolate as required and then locate using
TDR, distance to short function, or RFL.
Identify WB noise and impulse noise issues and
isolate to either pair imbalance or bonding and
grounding issue.
Isolate to potential impairment causing excessive
attenuation (loss) or excessive noise problem.
Based on error indications, isolate to
network problem or physical layer
related problem on the F2 plant or
in-home wiring
ESCALATE/
HAND OFF
Figure 4.15 Typical copper plant installation testing flow for IPTV service delivery
Network Issue
(Upstream of DSLAM)
Pair
Imbalance