Roughly 5% of the total revenue of the IT sector comes from the telecommunication software industry. And of the 7.5 lakh employees working with the IT sector, 50,000 are with the telecom software development sector, which is considered to be among the most specialised domain in the IT industry. According to industry reports, the telecom software industry is growing at 20% annually and is expected to sustain this growth in the next five years. Some of the major companies dealing with telecom software solutions in India are Wipro, Tech Mahindra, Sasken and Aricent, among others.