Exhibit 23.1



               Consent of Ernst & Young LLP, Independent Auditors


We consent to the incorporation by reference in the Registration Statement (Form
S-8 No.  333-_____)  pertaining to the Teligent,  Inc. 1997 Stock Incentive Plan
and the Teligent,  Inc. 1999 Employee  Stock  Purchase Plan, of our report dated
February 12, 1999,  with respect to the  consolidated  financial  statements  of
Teligent,  Inc.  included  in its Annual  Report  (Form 10-K) for the year ended
December 31, 1998, filed with the Securities and Exchange Commission.


                                                           /s/ Ernst & Young LLP
McLean, Virginia
December 20, 1999