EXHIBIT 10.15
                                 -------------
                                        
                             EMPLOYMENT AGREEMENT
                             --------------------


     This Agreement is entered into as of November 12, 1997 by and between
COMMUNICATION DEVELOPMENT CORPORATION, a Connecticut corporation with its
principal place of business at 30 Main Street, Suite 400, Danbury, CT  06810
(the "Company") and PATTI R. BISBANO, an individual residing at the address set
forth under her signature below ("Executive").


                                     FACTS
                                        

     The Company and various other wholly-owned subsidiaries (the
"Subsidiaries") of VIALOG Corporation, a Massachusetts corporation ("VIALOG"),
have participated in various acquisitions by VIALOG (the "Acquisitions")
pursuant to various Agreements and Plans of Reorganization or Stock or Asset
Purchase Agreements (the "Acquisition Agreements").

     Executive has realized, and will continue to realize, substantial value as
a result of the Acquisitions and a subsequent public offering of shares of
VIALOG.

     The Company desires to employ Executive as a senior executive with the
duties, responsibilities, rights and obligations set forth below, and Executive
desires to be so employed.

     In Executive's capacity as a senior executive of the Company, Executive
will obtain access to, and be in a position to adversely affect, the
confidential information and good will of VIALOG and its Subsidiaries (VIALOG
and the Subsidiaries collectively and each individually referred to as the
"VIALOG Group").

                                   AGREEMENT
                                        
     In consideration of the foregoing and of the covenants and agreements set
forth in this Agreement, the Company and the Executive agree as follows:

     1.  Term.  The term of this Agreement will commence on the Merger Closing,
         ----                                                                  
as that term is defined in the Acquisition Agreements (the "Effective Date"),
and will continue for three years from the Effective Date unless terminated in
accordance with the provisions of Section 6 of this Agreement (the "Term").

     2.  Duties and Responsibilities.  The Company agrees to employ Executive,
         ---------------------------                                          
and Executive agrees to be employed, as President, and Executive will perform
all of the duties and responsibilities of said office, subject to direction by
the Chief Executive Officer of VIALOG and the Board of Directors of the Company.
In addition, Executive will perform such other specific tasks and
responsibilities, consistent with Executive's position as President, as may be
assigned to her from time to time by the Chief Executive Officer of VIALOG and
the Board of Directors of the Company.  The Company will have the right to
reassign Executive to such other positions in the Company or within the VIALOG
Group as the Company may determine so long 

 
as such other positions involved a substantially similar level of compensation,
authority and responsibility as the position of President. However, Executive
will not be required to locate outside the Danbury, Connecticut area without
Executive's consent. Executive will devote substantially all of Executive's
business time, labor, skill and best efforts to carrying out Executive's duties
and responsibilities under this Agreement. Executive may engage in side business
activities so long as (i) Executive does not otherwise violate any other
provision of this Agreement, and (ii) such side business activities do not
interfere with Executive's ability to carry out Executive's duties and
responsibilities under this Agreement. Executive will travel to whatever extent
may be reasonably necessary in the conduct of the VIALOG Group's business and
Executive's duties and responsibilities under this Agreement.

     3.  Compensation.  Subject to Executive's adherence to Executive's
         ------------                                                  
responsibilities and obligations under this Agreement, the Company agrees to pay
Executive a base compensation at the annual rate of $140,000 and such additional
compensation as may be mutually agreed upon from time to time by the Company and
Executive.  Executive will be eligible for such increases (but not decreases) in
base compensation which shall be not less than 10% per annum, and to participate
in such bonus and/or incentive compensation plans, as shall be made available
from time to time to similarly situated senior executives of the Company.

     4.  Benefits and Vacation.  Executive will be eligible to participate in
         ---------------------                                               
and/or receive such group insurance plans, other fringe benefit plans and
vacation as the Company makes available to similarly situated senior executives.
During the term of this Agreement, Executive will receive an automobile
allowance in the amount of $400 per month.

     5.  Expense Reimbursement.  Executive will be entitled to reimbursement for
         ---------------------                                                  
business expenses incurred by Executive connection with the performance of
Executive's duties and responsibilities under this Agreement upon submission of
documentation in accordance with such procedures as the Company may establish
from time to time.

     6.  Termination.  The Company may terminate Executive's employment at any
         -----------                                                          
time during the Term for any reason as follows:

         (a) By the Company for Cause.  The Company has the right to terminate
             ------------------------                                         
Executive's employment immediately for "Cause".  For purposes of this Agreement
only, the term "Cause" means material breach of any provision of this Agreement;
material willful misconduct in the performance of Executive's duties or
responsibilities; material willful nonperformance of Executive's duties or
responsibilities other than by reason of disability; conviction of, or written
admission to, a felony or other crime involving moral turpitude; imprisonment
for any crime constituting a felony; any act involving theft, embezzlement or
fraud; or a material violation of any written policy of the Company.  If
Executive's employment is terminated for Cause, the Company will only be
obligated to pay Executive his base compensation through the date of such
termination, together with such other benefits or payments to which Executive
may be entitled (in the event of a Cause termination) by law or pursuant to
benefit plans of the Company then in effect.  Executive will remain bound by
Executive's obligations under Sections 7, 8 and 9 of this Agreement.

                                       2

 
         (b) Disability.  The Company has the right to terminate Executive's
             ----------                                                     
employment if Executive is prevented, by illness, accident, disability or any
other physical or mental condition, from substantially performing Executive's
duties and responsibilities under this Agreement for one or more periods
totaling one hundred fifty (150) days in any (12) month period.  If Executive's
employment is terminated pursuant to this section, Executive will be entitled to
receive such base compensation and group insurance benefits as Executive would
have received (at such times as Executive would have received them) during a
period equal to the greater of (i) one (1) year, or (ii) the remainder of the
Term had Executive remained employed by the Company, which amount will be
reduced by only the amount actually received by Executive under any disability
plans maintained by the Company.  Executive will also be entitled to receive
such payments or benefits to which Executive may be entitled by law or pursuant
to benefit plans of the Company then in effect.  Executive will remain bound by
Executive's obligations under Sections 7, 8 and 9 of this Agreement.

         (c) Death.  If Executive dies during the Term, then the Company will 
             -----   
pay to Executive's estate, designated beneficiary, or legal representative such
base compensation and group insurance benefits as Executive would have received
(at such times as Executive would have received them) during a period equal to
the greater of (i) one (1) year, or (ii) the remainder of the Term, together
with such other benefits or payments to which Executive may be entitled by law
or pursuant to benefit plans of the Company then in effect.

         (d) Resignation and Termination by the Company Other than for Cause,
             ----------------------------------------------------------------
Disability or Death.  The Company and Executive each have the right to terminate
- -------------------                                                             
Executive's employment upon thirty (30) days' prior written notice.  If
Executive's employment is terminated pursuant to this Section 6 (d) during the
Term by the Company, Executive will be entitled to receive such base
compensation and group insurance benefits as Executive would have received (at
such times as Executive would have received them) during a period equal to the
greater of (i) one year or (ii) the remainder of the Term had Executive remained
employed by the Company (the "Severance Period"), together with such other
payments and benefits to which Executive may be entitled by law or pursuant to
benefit plans of the Company then in effect.  Executive will remain bound by
Executive's obligations under Sections 7, 8 and 9 of this Agreement.

     7.  Confidentiality.  Executive will not at any time, without the Company's
         ---------------                                                        
prior written consent, reveal or disclose to any person outside of the VIALOG
Group, or use for his own benefit or the benefit of any other person or entity,
any confidential information concerning the business or affairs of the VIALOG
Group, or concerning the customers, clients or employees of the VIALOG Group
("Confidential Information").  For purposes of this Agreement, Confidential
Information includes, but is not limited to, financial information or plans;
sales and marketing information or plans; business or strategic plans; salary,
bonus or other personnel information of any type; information concerning methods
of operation; proprietary systems or software; legal or regulatory information;
cost and pricing information or policies; information concerning new or
potential products or markets; models, practices, procedures, strategies or
related information; research and/or analysis; and information concerning new or
potential investors, customers, or clients.  Confidential Information does not
include Confidential 

                                       3

 
Information already available to the public through no act of Executive's, nor
does it include salary, bonus or other personnel information specific to
Executive nor does it include information Executives must disclose as a result
of judicial rules or court order.

     Executive further understands and agrees that all Confidential Information,
however or whenever produced, will be the VIALOG Group's sole property, and will
not be removed by Executive (or anyone acting at Executive's direction or on
Executive's behalf) from the VIALOG Group's custody or premises without the
Company's prior written consent.  Upon the termination of Executive's
employment, Executive will promptly deliver to the Company all copies of all
documents, equipment, property or materials of any type in Executive's
possession, custody or control, that belong to the VIALOG Group, and/or that
contain, in whole or in part, any Confidential Information.

     8.  Inventions.  During the Term of this Agreement, Executive will promptly
         ----------                                                             
disclose to the Company or any successor or assign, and grant to the Company and
its successors and assigns (without any separate remuneration or compensation
other than that received by Executive in the course of employment), Executive's
entire right, title and interest in and to any and all inventions, developments,
discoveries, models, or any other intellectual property of any type or nature
whatsoever ("Intellectual Property") developed during the Term of this
Agreement, whether developed by Executive during or after business hours, or
alone or in connection with others, reasonably related to the business of the
Company, the Subsidiaries and their respective successors or assigns, determined
as such business is constituted at the time of the invention.  Executive agrees,
at the Company's expense, to take all steps necessary or proper to vest title to
all such Intellectual Property in the Company, its affiliates, successors,
assigns, nominees or designees, and to cooperate fully and assist the VIALOG
Group in any litigation or other proceedings involving any such Intellectual
Property.

     9.  Restrictive Covenants.  During the Restricted Period (defined below),
         ---------------------                                                
Executive will not, directly or indirectly, for Executive's own account or for
or on behalf of any other person or entity, whether as an officer, director,
employee, partner, principal, joint venturer, consultant, investor, shareholder,
independent contractor or otherwise:

         (a) engage in any business in competition with the then business of the
VIALOG Group at the time of the termination of Executive's employment;

         (b) solicit business in competition with the VIALOG Group from any (i)
clients of the VIALOG Group who were clients of the VIALOG Group at the time of
the termination of Executive's employment;

         (c) hire or employ, or attempt to hire or employ, in any fashion
(whether as an employee, independent contractor or otherwise), any employee or
independent contractor of the VIALOG Group, or solicit or induce, or attempt to
solicit or induce, any of the VIALOG Group's employees, consultants, clients,
customers, vendors, suppliers, or independent contractors to terminate their
relationship with the VIALOG Group; or

                                       4

 
         (d) speak or act in any manner that is intended to, or does in fact,
damage the goodwill or the business or reputation of the VIALOG Group.

     For purposes of this Agreement, the Restricted Period will be a period
beginning on the Merger Closing, as that term is defined in the Acquisition
Agreements, and ending on the later of (i) one (1) year from the termination
date of this Agreement or (ii) two (2) years after the last day of the Severance
Period.

     Executive understands and agrees that, by virtue of Executive's position
with the Company, Executive will have substantial access to and impact on the
good will, confidential information and other legitimate business interests of
the VIALOG Group, and therefore will be in a position to have a substantial
adverse impact on the VIALOG Group's business interests should Executive engage
in business in competition with the VIALOG Group.  Executive acknowledges that
Executive's adherence to the restrictive covenants set forth in this Section is
an important and substantial part of the consideration that the Company is
receiving under this Agreement, and agrees that the restrictive covenants in
this Section are enforceable in all respects.  Executive consents to the entry
of injunctive relief to enforce such covenants, in addition to such other relief
to which the Company may be entitled by law.

     10.  Specific Performance.  Executive acknowledges that the VIALOG Group's
          --------------------                                                 
remedy at law for breach of Sections 7, 8 and 9 of this Agreement would be
inadequate, and agrees that, for breach of such provisions, the VIALOG Group is
entitled to injunctive relief and to enforce its rights by an action for
specific performance.

     11.  Choice of Law.  This Agreement, and all disputes arising under or
          -------------                                                    
related to it, will be governed by the law of the State of Connecticut.

     12.  Choice of Forum.  All disputes arising under or out of this Agreement
          ---------------                                                      
will be brought in courts of competent jurisdiction located within the State of
Connecticut.

     13.  Assignment.  This Agreement, and the rights and obligations of
          ----------                                                    
Executive and the Company, inures to the benefit of and is binding upon,
Executive, Executive's heirs and representatives, and upon the Company, the
Subsidiaries and their respective successors and assigns.  This Agreement may
not be assigned by Executive.  This Agreement may be assigned to any member of
the VIALOG Group.

     14.  Notices.  All notices required by this Agreement will be in writing
          -------                                                            
and will be deemed to have been duly delivered when delivered in person or when
mailed by certified mail, return receipt requested, or nationally recognized
next day delivery service, as follows:


          (a)  If to Executive, to the address which appears below Executive's
               signature to this Agreement

          (b)  If to the Company:

                                       5

 
                    Communications Development Corporation
                    c/o VIALOG Corporation
                    Ten New England Business Center, Suite 302
                    Andover, MA 01810

or to such other address as a party specifies in writing given in accordance
with this Section.

     15.  Severability.  If any one or more of the provisions of this Agreement
          ------------                                                         
is held to be invalid, illegal or unenforceable, the validity, legality and
enforceability of the remaining provisions will not in any way be affected or
impaired.  Moreover, if any one or more of the provisions contained in this
Agreement is held to be excessively broad as to duration, activity or subject,
such provision will be construed by limiting or reducing it so as to be
enforceable to the maximum extent compatible with applicable law.

     16.  Consultation with Counsel; No Representations.  Executive acknowledges
          ---------------------------------------------                         
that Executive has had a full and complete opportunity to consult with counsel
of Executive's own choosing concerning the terms, enforceability and
implications of this Agreement, and that the Company has made no representations
or warranties to Executive concerning the terms, enforceability or implications
of this Agreement other than are as reflected in this Agreement.

     17.  Entire Agreement.  This Agreement represents the entire agreement
          ----------------                                                 
between the Executive and the Company with respect to the subject matter hereof
and supersedes all other agreements between the Company and Executive with
respect to such subject matter.

     Executed under seal as of November 12, 1997.


EXECUTIVE                              COMMUNICATION DEVELOPMENT
                                       CORPORATION


 /s/ Patti R. Bisbano                  By: /s/ Glenn D. Bolduc
- -----------------------------             ----------------------------
Patti R. Bisbano                       Name:  Glenn D. Bolduc
                                       Title: Director

 31 Juniper Ridge Drive
- -----------------------------
Address:

 Danbury, CT  06811
- -----------------------------

                                       6