EXHIBIT 23.2
Consent of Independent Auditors
We consent to the reference to our firm under the caption "Experts" and to the
use of our reports dated March 22, 1999 and November 19, 1999, with respect to
the financial statements of CDM On-Line, Inc. (predecessor), and to the use of
our report dated February 11, 2000 (except Note 16, as to which the date is
April 27, 2000), with respect to the consolidated financial statements of
Primary Network Holdings, Inc. (successor), included in the Proxy Statement of
MGC Communications, Inc. that is made a part of Post-Effective Amendment No. 1
on Form S-8 No. 333-36672 to the Registration Statement (Form S-4 No. 333-36672)
and Prospectus of MGC Communications, Inc. for the registration of 1,400,000
shares of its common stock.
/s/ Ernst & Young LLP
St. Louis, Missouri
June 28, 2000
