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India, the second largest mobile market in the world, is also among the fastest growing mobile markets globally. The total number of mobile subscribers in India (i.e., the subscriber base) has increased from 6.4 mn in March 2002 to around 350 mn in December 2008, at a compounded annual growth rate (CAGR) of 81%. This has necessitated the growth of Passive infrastructure in Telecom. Passive infrastructure being one of the most important components of a mobile network, the same has been a critical area of operations for telecom companies in the past. According to estimates, passive infrastructure accounts for 60-70% of the total cost of setting up a wireless network. Passive infrastructure has assumed the status of an independent industry during the past few years.

Passive infrastructure includes the towers, shelters, cooling systems, AC and DC power supply, diesel generators, air conditioning, site leases, and other electrical and civil works in relation to a mobile telecoms network that enable a mobile operator to install the active infrastructure, such as base terminal station equipment, associated antennae, and backhaul connectivity to a mobile operators network at such telecoms sites.

Deregulation and competition in wire line and wireless infrastructure telecommunication systems have accelerated the need for lower-cost equipment solutions with an ever increasing bandwidth. The challenge of power-management requirements for telecom equipment continues to grow. Factors driving power management are size, thermal management, cost, and electrical performance (regulation, transient response, and noise generation). Increasingly, designers are asked to provide more voltage rails for a variety of digital signal processors (DSPs), field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), and microprocessors. In short, they are required to generate more voltages, at higher currents, more efficiently, with less noise, in a smaller space.

Telecommunication infrastructure is always on the look-out for improved energy performance and uninterrupted power is an absolute requirement, but the traditional solutions may be quite power-hungry. A telecom system built with state-of-the-art power modules allow the system designer to reduce system size, decrease dissipated power, meet the power demands of high-performance digital circuits, and reduce the cost of power compared to regulated-voltage IBA systems. We felt that we needed to come up with ways to decrease both capital and operating expenses for our customers. The SMCS is one of the results of this process. At Delta we think that where things can be done cheaper they should be.