Product/Service
DS3 FLC Distance Learning
Distance learning offers several benefits to the traditional classroom setting. It provides for a more effective use of an educator's time, and allows a specialist's expertise to be spread across a wider audience. In addition, distance learning permits the sharing of resources between institutions and increases the availability of a broader curriculum to the student body. In short, distance learning solves educators' problem of providing more variety with fewer resources.
Several networks, such as DS3, analog or DS1/fractional DS1, exist to facilitate distance learning. Of these, a DS3 network proves to be the best solution. Due to the availability of greater bandwidth, a DS3 network requires less signal compression than a DS1 network. This leads to a higher quality video signal with DS3 transmission than with DS1. Because DS3 transmission requires less compression than DS1, DS3 compression equipment costs significantly less, making the DS3 network a more cost-effective video transmission solution.
DS3 video transmission also compares favorably to analog video transmission. Analog transmission distance limitations arise because an analog signal repeater amplifies both the signal and any noise accompanying the signal; a digital signal can be effectively regenerated without amplifying the accompanying noise. This advantage allows a digital signal to be successfully transmitted over longer distances. In addition, analog video transmission requires an analog switch, which is not normally found in a central office. Digital cross-connect systems provide DS3 switching and are frequently available as an integral part of the telephone company network. Therefore, digital video transmission utilizes existing switching capabilities whereas analog video transmission requires purchasing additional switching equipment, making digital video transmission a more cost-effective solution.
ADC Canada, 2240 Campbell Creek Blvd., Richardson, TX 75082. Tel: 972-680-6900; Fax: 972-680-0370.
