For Immediate Release September 30, 1997

NTT to Make Strategic Investment in U.S.- Based Teligent

Nippon Telegraph and Telephone Corporation (NTT) signed an agreement in Tokyo today with Teligent, a fixed wireless local access carrier, to acquire 12.5% interest* of the U.S.-based company for US$100 million. The agreement was signed by Teligent Chairman and Chief Executive Officer Alex J. Mandl and NTT President Jun-ichiro Miyazu. NTT will appoint one director to Teligent's board, as well as dispatch engineers to assist with Teligent's network design, network management and deployment of advanced services. Initially, the two companies will focus on NTT's provision of technical support for Teligent's network design. In light of the strong potential of the U.S. local-access market and Teligent's potential strength in the market, NTT decided to become a partner in the firm.

Outline of Teligent: Establishment: June 1996 Head Office: Alexandria, Virginia Chairman and CEO: Alex J. Mandl (former AT&T President) Capital Ownership: 55% - Associated Group, Inc. (September, 1997) 45% - Digital Service Corporation Services: Local exchange; high-speed data transmission and Internet access, videoconferencing, and advanced services such as voice mail Roll-Out Plan: Fixed-wireless local access operations will be provided under a 24-GHz frequency covering 74 major US markets. Initial services are currently being provided in preparation for a full-scale launch of leased-line and telephone services for corporate customers in April 1998.

* Teligent is a L.L.C. (Limited Liability Company, a partnership format), and does not issue stock.

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