TAILIEUCHUNG - Connecting the first mile

In the not too distant past, MSOS (multiple system operators) relied on the customer to monitor network outages, a system that greatly contributed to cable television's reputation for inconsistent service. But that doesn't fly in the broadband age. Today's fuff service cable network must have automated processes to detect trouble, pinpoint the location and provide an inication of the trouble type. | TELECOMMUNICATIONS MAGAZINE Deploying new sendees gives MSOs a side benefit a free RF monitoring system. The Self-Monitoring HFC Network Hal Roberts and Bill Mitchell In the not-too-distant past MSOs multiple system operators relied on the customer to monitor network outages a system that greatly contributed to cable television s reputation for inconsistent service. But that doesn t fly in the broadband age. Today s full-service cable network must have automated processes to detect trouble pinpoint the location and provide an indication of the trouble type. In many cases MSOs have already installed monitoring systems in their HFC hybrid fiber coax networks simply by deploying new services. Deployment of data telephony and videoon-demand systems over HFC plant often provides a side benefit to the operaton a free RF monitoring system. Many of these systems provide RF information on forward and return car-ricr-to-noisc ratio signal outages forward and return path attenuation changes and absolute RF signal levels. In addition data such as telephony traffic levels congestion. blocking data capacity packet throughput retransmits bit error rates and availability may also Ih- provided. Hie most significant advantage to this type of plant monitoring is that the monitoring points in the form of subscriber modems are distributed throughout the network. It would be prohibitively expensive to purchase dedicated monitors and install them at hundreds of locations throughout the network simply for plant maintenance. The economics allowing the installation of these modem monitors arc-driven by the services provided. The monitoring advantages are a byproduct of the deployment of these sophisticated systems. Figure I which indicates that certain HFC telephony modems arc experiencing RF level shifts is an example of how a problem can be detected in advance of a customer trouble ticket. The RF levels of some telephony modems arc close enough to the transmit power limits so Fig. 1 A .

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