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TheCityOfLoma LindaCalifornia

Allied Telesyn

Fiber Optic Signal Distribution
Loma Linda has a city-wide, fiber-optic based, communications network. The network provides a very high common denominator of broadband/digital communications speed and supports both commercial connectivity, as well as those associated with residential use. These uses include public safety/service, city communications, as well as the wide variety of Internet access applications used by all. Voice-over-IP is strongly supported, as well as E911 capabilities.

How It’s Designed

The 8 square mile city of Loma Linda is divided into numerous zones of connectivity. These zones represent redundant fiber cable links that run through different areas of the city, branching away from the City of Loma Linda’s Network Operations Center, located in the City Civic Center. Allied Telesyn fiber optic switch and routing products comprise the primary network distribution for network distribution throughout the city. 

Fiber optic cables, based on modulated light transmission, have the ability to deliver signal at very high data rates and aren’t influenced by problems that typically plague copper cabling. As an example, sun spots, water submersion, temperature extremes, cable pinches, oxidation, signal loss over long distances, and other copper cable weaknesses don’t have an affect on fiber cabling. This permits network/broadband signals to be delivered throughout the City via Allied Telesyn fiber-based Internet switches/routers.

The Signal Paths

The central connection points for the City’s network utility are located inside the Loma Linda City Civic Center’s Network Operations Center (NOC). Inside the NOC are numerous signal distribution components from Allied Telesyn, including cross-connect equipment that links the numerous segments that surround and permeate the city’s right of ways.

These City network utility circuits link residential and commercial users to a wide variety of services. Locally, connections are provided to public safety/municipal services, library circuits, and services that are hosted in the Loma Linda Civic Center NOC. These service include virtual PBX services (used largely by businesses), as well as routes to Internet II, the National Lambda Rail, links to San Diego State University, and of course, Internet connectivity providers At both intermediate and the primary switching center, network routing techniques (ISO/OSI Layer 3 Routing, VLANs, and others) are used to partition, aggregate, and otherwise highly manage network traffic. This permits virtual networks to be designed that can easily connect, at customer discretion, any office or room to any other in the city, simply and securely—and at unbelievable speeds—all through fiber optic and copper routers and switches provided by Allied Telesyn.

As the fiber optic circuits branch away from the Civic Center NOC, they run through City right-of-ways to intermediate distribution points in residential communities, business parks, and wireless distribution points as well as to municipal services areas. At these circuit destinations, Allied Telesyn routers in turn, distribute the signals to the end destinations: homes, offices, shopping areas, and public access points.

The Loma Linda Advantage
The fiber optic communications infrastructure enabled by Allied Telesyn’s equipment provides a sound, redundant, and highly flexible network for the residents and business users of Loma Linda’s network utility. The high-reliability and flexible design of Allied Telesyn’s equipment permits city network users among the highest communications speed in the United States, exceeding the communications capabilities of even highly advanced university campuses. The assets that have been deployed will allow Loma Linda a long lasting return.