Triple-Play Service Deployment

Chapter 5: Troubleshooting the Premises Wiring
may be performing well and providing adequate isolation. For
calibrated measurements JDSU recommends creating a pass or fail
conditional threshold based on 30 dB of shielding effectiveness.
Note: It is best to perform the noise immunity test outside the premises at the NID where FM
radio signals are strongest. A FM reference signal from outside the premises is necessary to
baseline premises measurements indoors. In order to ensure good noise immunity in a cable
plant, the technician must ensure that all cable connections are tightened, and that all cables
with damaged shielding as well as low quality splitters and barrels are replaced. Additionally,
any non-terminated pieces of coax must be terminated.
Importance of In-Home Test Strategy
The challenge of reliable triple-play service delivery extends from
the headend through the home. Historically, providers have been
concerned with the transport of services from the core network to
the customer’s network interface device.Through the evolution of
the in-home network and its potential impact on customer QoE,
providers now are tasked to extend provisioning and service
assurance strategies from the headend to the customer’s set top box.
The quality of service—and the provider’s ability to ensure service
quality—relies not only on effective provisioning but also on the
quality of the existing in-home wiring. While providers strive to
maintain a philosophy of “no new wires” during service
installations, in order to reduce costs both for the provider and
customer, technicians must optimize performance across
scenarios that can include multiple wiring interfaces such as coax,
phone wiring, wireless, and Ethernet. Thorough, appropriate
testing and verification of the in-home wiring and the service are
key in ensuring that the installation will meet customer
expectations and prevent future trouble calls.
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