New Delhi, Dec 17 :     Ascom India Pvt Ltd has bagged a major order to supply 4,000 integrated switched digital network (ISDN) phones to Mahanagar Telephone Nigam Ltd (MTNL) and has drawn up a plan to make India an export base for its telecom products. ISDN is a planned public end-to-end digital communication network that will provide simultaneous voice, image, video, telemetry and data signalling over twisted pair wire (normal telephone line) as well as other medium.  An ISDN phone is technically equipped to provide all services through an ISDN network. MTNL had recently announced its plans to offer ISDN phones for reliable internet connectivity and better performance. The department of telecommunications (DoT), in its efforts to promote ISDN in the country, has already waived the minimum monthly billing of Rs 5,000 and is now billing only at actuals. Ascom India is a 100 per cent subsidiary of Ascom AG, the Swiss company manufacturing telecommunication and service automation products.  Ascom has a manufacturing base at Gurgaon near Delhi with a capacity to produce 30,000 ISDN units. Ascom India?s country business manager, business, Sudhir Gupta said,?We are encouraged by the growth of ISDN in the Indian market. We will have a 10-15 per cent market share in the current financial year and have set a target of growing 15 per cent every year.? The company executives were tightlipped about the additional investment plans for expanding the operations. ?We do not make public our accounts and investment for the subsidiary. But the expansion would be undertaken through internal resources. We do not plan to bring any investment from the parent company,? Gupta said. Ascom is also planning to offer pay-phones to MTNL. ?We have participated in the tender floated by MTNL for purchase of pay-phones,? Gupta said. The company also plans to provide software for various telecom products. It already develops the necessary software at the Gurgaon centre for pay-phones and other equipment, which will soon be developed for commercial purposes. ?Currently, the software centre develops necessary software for our products, while some part of it is also sold to other companies. It is in a 70:30 ratio, but we are planning to increase it,? Gupta said.