Exhibit 10.15

Amount: $2,270,000.00                                       Date: March 11, 1997

                     AMENDED AND RESTATED PROMISSORY NOTE

            FOR VALUE RECEIVED, the undersigned (the "Borrower" or "you") hereby
promises to pay to the order of Motorola, Inc. ("MOTOROLA") a Delaware
corporation, at its principal offices at 1303 East Algonquin Road, Schaumburg,
Illinois 60196, the principal sum of TWO MILLION TWO HUNDRED SEVENTY THOUSAND
Dollars ($2,270,000.00) or, if less, the aggregate unpaid principal amount of
all advances made by MOTOROLA to the Borrower under the Credit Agreement (the
"Credit Agreement") dated as of June 29, 1995, as amended, between the Borrower
and MOTOROLA, together with interest on the entire principal balance from time
to time outstanding hereunder.

            Interest shall accrue as of the date of this Note and shall be
calculated on the entire principal balance outstanding from time to time at a
rate per annum equivalent to six percent (6%) in excess of the Commercial Paper
Rate (for high-grade unsecured notes sold through dealers by major corporations,
90-day average maturities), published each Business Day in the Wall Street
Journal, in effect on the first day of each calendar quarter. Interest shall be
payable monthly in arrears on the first day of each month. The first interest
payment shall be due on the first day of the month first following the date of
the first advance under the Credit Agreement. Interest shall be calculated on a
365/366 day year basis for actual days elapsed. Upon the occurrence of an Event
of Default, the interest rate shall be increased by a further three percent (3%)
per annum above the rate otherwise applicable or (if lesser) the maximum rate
permitted by law. In no event shall the holder of this Note be entitled to claim
any sum or rate of interest in excess of the maximum allowed by law. Any payment
in excess of such maximum sum or amount of interest shall be applied to reduce
outstanding principal or shall be refunded to Borrower, at MOTOROLA's option.

            MOTOROLA shall record on its books or records or on the schedule to
this Note, which is a part hereof, the principal amount of each advance made by
MOTOROLA to the Borrower under the Credit Agreement, all payments and
prepayments of principal and interest, the principal balance from time to time
outstanding and the respective dates and maturity dates thereof. The record
thereof, whether shown on such books or records or on the schedule to this Note,
shall be prima facie evidence as to all amounts owing under this Note; provided,
however, that the failure of MOTOROLA to record any of the foregoing or any
error in such notation shall not limit or otherwise affect the obligation of the
Borrower to repay


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the entire Credit under the Credit Agreement together with accrued interest
thereon.

            Notwithstanding any provision to the contrary set forth in the
Credit Agreement, all outstanding principal, together with all accrued and
unpaid interest and all other amounts due under or in connection with this Note,
shall be due and payable on July 15, 1997.

            This Note is the Promissory Note referred to in, and issued under,
the Credit Agreement and MOTOROLA is entitled to all of the benefits provided
for therein; reference is hereby made to the Credit Agreement for a statement of
all such benefits. Capitalized terms not defined in this Note shall have the
meanings assigned to such terms in the Credit Agreement and the exhibits
attached thereto. Without limiting that reference, MOTOROLA shall be entitled to
recover its attorney's fees and costs in connection with any actions or
proceedings taken to collect any amount due under this Note after any Event of
Default as detailed in the Credit Agreement.

            This Note shall be subject to, governed and construed according to
the laws of the State of Illinois, without regard to its provisions on the
conflict of laws.

            The maker hereby waives notice, protest, presentment, and notice of
dishonor to the full extent permitted by law. This Note evidences an
indebtedness incurred in connection with a commercial transaction rather than a
consumer or household debt.

            YOU AND MOTOROLA AGREE THAT ANY CLAIM, COUNTERCLAIM, SETOFF, OR
DEFENSE RELATING IN ANY WAY TO THIS NOTE, OR TO THE MATTERS AND TRANSACTIONS
GIVING RISE TO THE ADVANCES AND INDEBTEDNESS EVIDENCED BY THIS NOTE, SHALL BE
HEARD AND DETERMINED BY A COURT WITHOUT A JURY.

                              PAGING PARTNERS CORPORATION



                              By:________________________________
                                 Richard J. Giacchi
                                 President and Chief Executive Officer


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