<PAGE>
 
                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                           Washington, D. C.  20549

                                  __________

                                  FORM 10-Q/A

          X  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
          -                                                         
             SECURITIES EXCHANGE ACT OF 1934
             FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1998

                                      OR

             TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
          -
             SECURITIES EXCHANGE ACT OF 1934

          

                       Commission file number  333-22585


                              VIALOG CORPORATION
            (Exact name of registrant as specified in its charter)

           MASSACHUSETTS                                 04-3305282
   (State or other jurisdiction of                     (I.R.S. Employer 
   incorporation or organization)                      Identification No.)


                   35 NEW ENGLAND BUSINESS CENTER, SUITE 160
                         ANDOVER, MASSACHUSETTS  01810
         (Address of principal executive offices, including Zip Code)

                                (978) 975-3700
                                ---------------
             (Registrant's telephone number, including area code)



Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding twelve months (or such shorter period that the registrant was
required to file such reports), and (2) has been subject to the filing
requirements for the past 90 days.
Yes       X             No
        -----         ------          

At May 11, 1998 the registrant had outstanding an aggregate of 3,648,472 shares
of its Common Stock, $.01 par value.


                                       1


<PAGE>
 
                               VIALOG CORPORATION

                                     INDEX


<TABLE>
<CAPTION>
PART I.  FINANCIAL INFORMATION                                                                              Page
                                                                                                            ----
 
<S>                                                                                                    <C>
ITEM 1.  FINANCIAL STATEMENTS

   Consolidated Balance Sheets at December 31, 1997 and March 31, 1998 (Unaudited)                           3
                                                                                                              
   Consolidated Statements of Operations (Unaudited) for the Three Months Ended                         
      March 31, 1997 and 1998                                                                                4

   Consolidated Statements of Cash Flows (Unaudited) for the Three Months Ended                        
      March 31, 1997 and 1998                                                                                5
   
   Notes to Consolidated Financial Statements (Unaudited)                                                   6-8

ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS              9-12
                                                                                                        
                                                                                                        
PART II.  OTHER INFORMATION                                                                             

ITEM 1.  LEGAL PROCEEDINGS                                                                                   13

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K                                                                    13

SIGNATURES                                                                                                   14

EXHIBIT INDEX                                                                                                15
</TABLE>

                                       2

<PAGE>
 
                              VIALOG CORPORATION
                          CONSOLIDATED BALANCE SHEETS
                (In thousands, except share and per share data)
<TABLE> 
<CAPTION>         
                                                                                                 DECEMBER 31,         MARCH 31,
                                                                                                     1997                1998
                                                                                               -----------------   -----------------

<S>                                                                                           <C>                 <C> 
                                           ASSETS                                                                      (Unaudited)
Current assets:
     Cash and cash equivalents                                                                        $  9,567            $  8,015
     Accounts receivable, net of allowance for doubtful accounts of $32 and $86,               
          respectively                                                                                   5,686               6,962
     Prepaid expenses                                                                                      156                 270
     Other current assets                                                                                  101                 159
                                                                                               -----------------   -----------------
        Total current assets                                                                            15,510              15,406

Property and equipment, net                                                                              7,544               8,560
Deferred debt issuance costs                                                                             7,324               6,851
Goodwill and intangible assets, net                                                                     44,391              43,762
Other assets                                                                                               314                 291
                                                                                               -----------------   -----------------

        Total assets                                                                                  $ 75,083            $ 74,870
                                                                                               =================   =================

                            LIABILITIES AND STOCKHOLDERS' DEFICIT                                                    
Current liabilities:                                                                                                
     Current portion of long-term debt                                                                $    397            $    381
     Accounts payable                                                                                    2,129               2,495
     Accrued interest expense                                                                            1,310               3,685
     Accrued expenses and other liabilities                                                              4,415               3,843
                                                                                               -----------------   -----------------
        Total current liabilities                                                                        8,251              10,404

Long-term debt, less current portion                                                                    71,539              71,723

Other long-term liabilities                                                                                175                 194

Commitments and contingencies                                                                                        

Stockholders' deficit:                                                                                              
     Preferred stock, $0.01 par value; 10,000,000 shares authorized; none issued                                         
          and outstanding                                                                                 --                  --
     Common stock, $0.01 par value; 30,000,000 shares authorized; 3,486,380 and                                          
          3,576,440 shares, respectively, issued and outstanding                                            35                  36
     Additional paid in capital                                                                         11,689              11,713
     Accumulated deficit                                                                               (16,606)            (19,200)
                                                                                               -----------------   -----------------
        Total stockholders' deficit                                                                     (4,882)             (7,451)
                                                                                               -----------------   -----------------
        Total liabilities and stockholders' deficit                                                   $ 75,083            $ 74,870
                                                                                               =================   =================

</TABLE> 




         See accompanying notes to consolidated financial statements.

                                       3
<PAGE>
 
                              VIALOG CORPORATION
               CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)
                (IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)
<TABLE> 
<CAPTION> 
                                                                                    THREE MONTHS ENDED MARCH 31,
                                                                               --------------------------------------
                                                                                     1997               1998
                                                                               -----------------  -------------------
<S>                                                                           <C>                 <C>
Net revenues                                                                   $            --    $           11,290
Cost of revenues, excluding depreciation                                                    --                 6,121
Selling, general and administrative expense                                                 870                3,506
Depreciation expense                                                                          1                  584
Amortization of goodwill and intangibles                                                    --                   628
                                                                               -----------------  -------------------
     Operating income (loss)                                                               (871)                 451

Interest expense, net                                                                        (3)              (3,045)
                                                                               -----------------  -------------------
     Net loss                                                                  $           (874)  $           (2,594)
                                                                               =================  ===================
                                                                               
Net loss per share - basic and diluted                                         $          (0.32)  $            (0.73)
                                                                               =================  ===================
Weighted average shares outstanding                                                   2,747,300            3,542,668
                                                                               =================  ===================
</TABLE> 
         See accompanying notes to consolidated financial statements.

                                       4
<PAGE>
 
                              VIALOG CORPORATION 
               CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
                                (IN THOUSANDS)

<TABLE> 
<CAPTION>  
                                                                                                THREE MONTHS ENDED MARCH 31,
                                                                                            -------------------------------------
                                                                                                  1997                1998
                                                                                            ------------------  -----------------
<S>                                                                                         <C>                 <C>  
Cash flows from operating activities:
     Net loss                                                                                  $        (874)    $        (2,594)
     Adjustments to reconcile net loss to net cash used in operating activities:                                          
        Depreciation                                                                                       1                 584
        Amortization of goodwill and intangibles                                                         -                   628   
        Amortization of debt issuance costs and debt discount                                            -                   748    
        Provision for doubtful accounts                                                                  -                    55    
        Compensation expense for issuance of common stock and options                                     24                   -   
     Changes in operating assets and liabilities:                                                                         
        Accounts receivable                                                                              -                (1,330)  
        Prepaid expenses and other current assets                                                          3                (172)
        Other assets                                                                                     (40)                 20
        Accounts payable                                                                                 453                 366
        Accrued expenses                                                                                 427               1,803
        Other long-term liabilities                                                                        -                  19
                                                                                            ------------------  -----------------
             Cash flows provided by (used in) operating activities                                        (6)                127
                                                                                            ------------------  -----------------
                                                                                                                          
Cash flows from investing activities:                                                                                     
     Additions to property and equipment                                                                 (21)             (1,600)
                                                                                            ------------------  -----------------
             Cash flows used in investing activities                                                     (21)             (1,600)
                                                                                            ------------------  -----------------
                                                                                                                          
Cash flows from financing activities:                                                                                     
     Proceeds from issuance of long-term debt and warrants                                               500                   - 
     Payments of long-term debt                                                                          -                  (104) 
     Proceeds from issuance of common stock                                                                2                  25
     Deferred offering costs                                                                            (650)                  - 
                                                                                            ------------------  -----------------
             Cash flows used in financing activities                                                    (148)                (79)
                                                                                            ------------------  -----------------
Net increase in cash and cash equivalents                                                               (175)             (1,552)

Cash and cash equivalents at beginning of period                                                         337               9,567
                                                                                            ------------------  -----------------
Cash and cash equivalents at end of period                                                     $         162     $         8,015
                                                                                            ==================  =================
                                                                                                                          
Supplemental disclosures of cash flow information:                                                                        
     Cash paid during the period for:                                                                                     
        Interest                                                                               $         -       $            36
                                                                                              
         

</TABLE> 
         See accompanying notes to consolidated financial statements.

                                       5
<PAGE>
 
                              VIALOG CORPORATION
                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                  (UNAUDITED)
                                        
(1)   BASIS OF PRESENTATION

The accompanying unaudited financial statements have been prepared by the
Company pursuant to the rules and regulations of the Securities and Exchange
Commission, and reflect all adjustments (all of which are of a normal recurring
nature) which, in the opinion of management, are necessary for a fair statement
of the results of the interim periods presented. The unaudited results of
operations for the quarter ended March 31, 1998 are not necessarily an
indication of the results of operations for the full year. These financial
statements do not include all disclosures associated with annual financial
statements and, accordingly, should be read in conjunction with the financial
statements and footnotes for the year ended December 31, 1997 included in the
Company's amended Form 10-K where certain terms have been defined. The
consolidated financial statements include the accounts of the Company and its
subsidiaries. All significant intercompany accounts and transactions have been
eliminated in consolidation.

(2)   DESCRIPTION OF BUSINESS

VIALOG Corporation (the "Company") was incorporated in Massachusetts on January
1, 1996 as Interplay Corporation.  In January 1997, the Company changed its name
to VIALOG Corporation.  The Company was formed to create a national independent
provider of group communications services, consisting primarily of operator-
attended and operator-on-demand audio teleconferencing, as well as video and
data conferencing services. On November 12, 1997, the Company sold $75.0 million
in senior notes due 2001, Series A in a private placement (the "Private
Placement"). Contemporaneously with the closing of the Private Placement, the
Company acquired, in separate transactions (the "Acquisitions"), six private
conference service bureaus (each an "Operating Center", and collectively, the
"Operating Centers") in exchange for cash and shares of its common stock.

Prior to November 12, 1997, the Company did not conduct any operations, and all
activities related to the acquisitions and the completion of financing
transactions to fund the Acquisitions.

(3)  LONG-TERM DEBT
<TABLE>                                               
<CAPTION> 
                                                      DECEMBER 31,     MARCH 31,
                                                         1997            1998
                                                      ------------     ---------
                                                             (IN THOUSANDS)
<S>                                                 <C>              <C>
12 3/4% Senior Notes Payable, due 2001, net 
  of unamortized discount of $4,203 and $3,931         $  70,797       $  71,069
Capitalized lease obligations                              1,044             945
Other long-term debt                                          95              90
                                                      ------------     ---------
   Total long-term debt                                   71,936          72,104
   Less current portion                                      397             381
                                                      ------------     ---------
   Total long-term debt, less current portion          $  71,539        $ 71,723
                                                      ============     =========

</TABLE> 

SENIOR NOTES PAYABLE

The senior notes issued in the Private Placement bear interest at 12  3/4% per
annum, payable semi-annually on May 15 and November 15 of each year, commencing
May 15, 1998.  The senior notes, which are guaranteed by each of the Operating
Centers, mature on November 15, 2001 and are redeemable in whole or in part at
the option of the Company on or after November 15, 1999 at 110% of the principal
amount thereof, and on or after November 15, 2000 at 105% of the principal
amount thereof, in each case together with accrued interest to the date of
redemption. In addition, there are certain other early redemption options
available to the Company at any time on or prior to November 15, 1999 at certain
premiums, as specified in the indenture pursuant to which the senior notes were
issued.


                                       6
<PAGE>
 
On February 12, 1998, the Company offered to exchange (the "Exchange Offer")
$75.0 million of 12  3/4% senior notes, Series B (the "Exchange Notes") for the
existing $75.0 million of 12  3/4% senior notes, Series A (the "Old Notes").  In
connection with the Exchange Offer, the Company filed with the Securities and
Exchange Commission a Registration Statement on Form S-4 for the registration of
the Exchange Notes under the Securities Act of 1933. The form and terms of the
Exchange Notes are identical in all material respects to the form and terms of
the Old Notes except for certain transfer restrictions and registration rights
relating to the Old Notes. The Old Notes and the Exchange Notes (collectively,
the "Senior Notes") were issued pursuant to an indenture dated November 12,
1997. The Company did not receive any proceeds from the Exchange Offer, which
was terminated on March 26, 1998 with all of the Old Notes being surrendered for
Exchange Notes.

(4) LOSS PER SHARE

As the Company was in a net loss position for the three months ended March 31,
1997 and 1998, common stock equivalents of 877,143 and 1,837,262, respectively,
were excluded from the diluted loss per share calculation as they would be
antidilutive. As a result, diluted loss per share for the three months ended
March 31, 1997 and 1998 is the same as basic loss per share and, therefore, has
not been presented separately.

(5) SUPPLEMENTAL CONSOLIDATING CONDENSED FINANCIAL INFORMATION

The 12 3/4% Senior Notes due November 15, 2001, in the aggregate principal 
amount of $75.0 million, are fully and unconditionally guaranteed, on a joint
and several basis, by all of the Company's subsidiaries. Each of the guarantors
is a wholly-owned subsidiary of the Company. Summarized financial information of
the Company and its subsidiaries is presented below as of and for the three
months ended March 31, 1998. Separate financial statements and other disclosures
concerning the guarantor subsidiaries are not presented because management has
determined that they are not material to investors.

 
 
<TABLE>
<CAPTION>
                           VIALOG
                           CORP.    ACCESS     CSI    CALL POINTS  TCC    AMERICO   CDC    ELIMINATIONS CONSOLIDATED
                          --------  -------  -------  ----------- ------  -------  ------  ------------ ------------
<S>                       <C>       <C>      <C>      <C>         <C>     <C>      <C>     <C>          <C>
BALANCE SHEET
 INFORMATION AS OF MARCH
 31, 1998 (UNAUDITED)

Total current assets....  $  9,650  $ 1,633  $ 1,144    $2,020    $  834  $ (457)  $  582    $    --      $15,406
Property and equipment,
 net....................       126    4,042    1,099     1,655       908     644       86         --        8,560
Investment in
 subsidiaries...........    57,121      --       --        --        --      --       --      (57,121)        --
Goodwill................       --    15,675   14,986     3,807     3,893   2,931    2,470         --       43,762 
Other assets............     6,938       34       67       --         12      87        4         --        7,142
                          --------  -------  -------    ------    ------  ------   ------    --------     -------
 Total assets...........  $ 73,835  $21,384  $17,296    $7,482    $5,647  $3,205   $3,142    $(57,121)    $74,870
                          ========  =======  =======    ======    ======  ======   ======    ========     =======
Current liabilities.....  $  5,438  $ 1,990  $   604    $  983    $  635  $  628   $  126    $    --      $10,404
Long-term debt,
 excluding current
 portion................    71,069       20      378       --        166      90      --          --       71,723
Other liabilities.......       --       161      --        --         13     --        20         --          194
Stockholders' equity
 (deficit)..............    (2,672)  19,213   16,314     6,499     4,833   2,487    2,996     (57,121)     (7,451)
                          --------  -------  -------    ------    ------  ------   ------    --------     -------
 Total liabilities and
  stockholders' equity
  (deficit).............  $ 73,835  $21,384  $17,296    $7,482    $5,647  $3,205   $3,142    $(57,121)    $74,870
                          ========  =======  =======    ======    ======  ======   ======    ========     =======
</TABLE> 

                                       7
<PAGE>
 
 
<TABLE>
<CAPTION>
                           VIALOG
                           CORP.    ACCESS     CSI    CALL POINTS  TCC    AMERICO   CDC    ELIMINATIONS CONSOLIDATED
                          --------  -------  -------  ----------- ------  -------  ------  ------------ ------------
<S>                       <C>       <C>      <C>      <C>         <C>     <C>      <C>     <C>          <C>
STATEMENT OF OPERATIONS
 INFORMATION FOR THE 
 THREE MONTHS ENDED   
 MARCH 31, 1998  
 (UNAUDITED)
Net revenues............  $    --   $ 4,355  $ 2,023    $2,347    $1,391  $  697   $  567    $    (90)    $11,290
Cost of revenues,
 excluding
 depreciation...........       --     2,081      897     1,675       721     500      337         (90)      6,121
Selling, general and
 administrative
 expenses...............     2,158      361      242       174       246     181      144         --        3,506
Depreciation expense....         8      286       93       105        52      28       12         --          584
Amortization of goodwill
 and intangibles........       --       224      217        64        51      39       33         --          628
                          --------  -------  -------    ------    ------  ------   ------    --------     -------
 Operating income
  (loss)................    (2,166)   1,403      574       329       321     (51)      41         --          451
Interest income
 (expense), net.........    (3,010)       1      (19)      --         (9)    (10)       2         --       (3,045)
                          --------  -------  -------    ------    ------  ------   ------    --------     -------
 Net income (loss)......  $ (5,176) $ 1,404  $   555    $  329    $  312  $  (61)  $   43    $    --      $(2,594)
                          ========  =======  =======    ======    ======  ======   ======    ========     =======
CASH FLOW INFORMATION
 FOR THE THREE MONTHS
 ENDED MARCH 31, 1998
Cash flows provided by
 (used in)
 operating activities...   $   (46) $   188  $   433    $ (347)   $  (14) $   88   $ (175)   $    --      $   127 
Cash flows provided by
 (used in) investing
  activities............       (65)  (1,022)    (231)     (143)      (77)    (60)      (2)        --       (1,600)
Cash flows provided by 
(used in) financing
activities..............        25       (9)     (66)      --        (25)     (4)     --          --          (79)
                          --------  -------  -------    ------    ------  ------   ------    --------     -------
Net increase in cash and
 cash equivalents.......       (86)    (843)     136      (490)     (116)     24     (177)        --       (1,552)
Cash and cash equiva-
 lents at the
 beginning of period....     8,396      440      (49)      489        46      67      178         --        9,567
                          --------  -------  -------    ------    ------  ------   ------    --------     -------
Cash and cash equiva-
 lents at the end of
 period.................  $  8,310  $  (403) $    87    $   (1)   $  (70) $   91   $    1    $    --      $ 8,015
                          ========  =======  =======    ======    ======  ======   ======    ========     =======
</TABLE>

                                       8
<PAGE>

  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
                                  OPERATIONS

This Management's Discussion and Analysis of Financial Condition and Results of
Operations should be read in conjunction with the financial statements and
footnotes contained in the Company's amended Form 10-Q for the three months
ended March 31, 1998 and the amended Form 10-K for the year ended December 31,
1997 filed with the Securities and Exchange Commission.

The Form 10-Q for the three months ended March 31, 1998 has been amended to
reflect a revised presentation style for the Consolidated Statement of
Operations and to include supplemental consolidating condensed financial
information for the Company and its subsidiaries as guarantors of the Company's
12 3/4% Senior Notes due November 15, 2001. In addition, certain disclosures
have been added to conform to the disclosures included in the Company's Form S-1
Registration Statement (file no. 333-53395) filed with the Securities and
Exchange Commission. There was no change to net revenues, net loss or net loss
per share for the three months ended March 31, 1997 and 1998 as a result of the
amendment.

VIALOG CORPORATION

 RESULTS OF OPERATIONS

The Company was incorporated on January 1, 1996.  Prior to the Acquisitions of
the Operating Centers, the Company did not conduct any operations, and all
activities conducted by it related to the Acquisitions and the completion of
financing transactions to fund the Acquisitions.

Net revenues and cost of revenues, excluding depreciation. As the Company did
not conduct any operations prior to November 12, 1997, there were no revenues
and cost of revenues, excluding depreciation for the three months ended March
31, 1997. Net revenues and cost of revenues, excluding depreciation for the
three months ended March 31, 1998 represent the consolidated results of the
Company, including the Operating Centers. 

Selling, general and administrative expenses. Selling, general and
administrative expenses increased $2.6 million, or 303%, from $870,000 to $3.5
million for the three months ended March 31, 1997 and 1998, respectively. The
increase was primarily due to the fact that selling, general and administrative
expenses for the three months ended March 31, 1997 represented only general and
administrative expenses related to the organization of the Company and the
consummation of business combination agreements with the Operating Centers,
while the expenses for the three months ended March 31, 1998 represent
consolidated selling, general and administrative expenses of the Company,
including the Operating Centers. Selling, general and administrative expenses
for the three months ended March 31, 1997 and 1998 consisted primarily of the
following: compensation, benefits and travel expenses of $415,000 and $2.2
million, respectively, certain marketing expenses including advertising, 
promotions, trade shows and consulting of $125,000 and $412,000,
respectively, professional services expenses of $233,000 and $316,000,
respectively, occupancy costs of $54,000 and $127,000, respectively, materials,
supplies and equipment related costs of $18,000 and $158,000, respectively,
taxes and insurance costs of $0 and $107,000, respectively, and all other costs
of $25,000 and $152,000, respectively.

Depreciation and amortization expense. Depreciation expense increased $583,000 
from $1,000 to $584,000 for the three months ended March 31, 1997 and 1998, 
respectively. The increase was primarily due to the fact that VIALOG Corporation
did not conduct operations during the three months ended March 31, 1997, while
depreciation expense for the three months ended March 31, 1998 represents
consolidated depreciation expense of the Company, including the Operating
Centers.

Interest expense, net. Interest expense, net increased $3.0 million from $3,000
to $3.0 million for the three months ended March 31, 1997 and 1998,
respectively. The increase was primarily due to (i) approximately $2.4 million
of accrued interest expense on the $75.0 million of Senior Notes and (ii)
approximately $746,000 of non-cash interest expense related to the amortization
of deferred debt issuance costs and original issue discount on the Senior Notes,
both of which were partially offset by increased interest income of
approximately $100,000 due to increased cash balances.

 LIQUIDITY AND CAPITAL RESOURCES

As the Company did not conduct any operations prior to November 12, 1997, the
Company generated negative cash flows for the three months ended March 31, 1997.
For the three months ended March 31, 1998, the Company generated a positive

                                       9
<PAGE>
 
cash flow from operations of $127,000. Cash used in investing activities of $1.6
million for the three months ended March 31, 1998 related to the acquisition of
property and equipment. Cash used in financing activities of $79,000 for the
three months ended March 31, 1998 related primarily to the repayment of capital
lease obligations offset by proceeds from the exercise of stock options. The
Company had working capital of $5.0 million at March 31, 1998.

On November 12, 1997, the Company completed a Private Placement of $75.0 million
of Senior Notes, Series A. The Senior Notes bear interest at 12 3/4% per annum,
payable semi-annually on May 15 and November 15 of each year, commencing May 15,
1998. The Senior Notes are guaranteed by the Operating Centers and mature on
November 15, 2001. The Senior Notes are redeemable in whole or in part at the
option of the Company on or after November 15, 1999 at 110% of the principal
amount thereof, and on or after November 15, 2000 at 105% of the principal
amount thereof until maturity, in each case together with accrued interest to
the date of redemption. In addition, there are certain other early redemption
options available to the Company at any time on or prior to November 15,1999 at
certain premiums, as specified in the Indenture. In the event of a change in
control, as defined in the Indenture, the Company may be required to repurchase
all of the outstanding Senior Notes at 101% of the principal amount plus accrued
interest and additional interest, if any. The Indenture contains restrictive
covenants with respect to the Company that among other things, create
limitations (subject to certain exceptions) on (i) the incurrence of additional
indebtedness,(ii) the ability of the Company to purchase, redeem or otherwise
acquire or retire any Common Stock or warrants, rights or options to acquire
Common Stock, to retire any subordinated indebtedness prior to final maturity or
to make investments in any person, (iii) certain transactions with affiliates,
(iv) the ability to materially change the present method of conducting business,
(v) the granting of liens on property or assets, (vi) mergers, consolidations
and the disposition of assets, (vii) declaring and paying any dividends or
making any distribution on shares of Common Stock, and (viii) the issuance or
sale of any capital stock of the Company's subsidiaries. The Indenture does not
require the Company to maintain compliance with any financial ratios or tests,
except with respect to certain restrictive covenants notes above. The Company is
in compliance with all covenants contained in the Indenture.

The Company anticipates that its cash flows from operations and existing cash 
balances will meet or exceed its 1998 working capital needs, debt service 
requirements and planned capital expenditures for property and equipment. The 
Company expects to meet its liquidity requirements beyond 1998, including 
repayment of the Senior Notes, through a combination of working capital, cash 
flow from operations, borrowings, and future issuances of debt and/or equity
securities. However, no assurances can be given that such funds will be
available when required or on terms favorable to the Company.

The Company intends to continue pursuing attractive acquisition opportunities.
The timing, size or success of any acquisition and the associated potential
capital commitments are unpredictable.  The Company plans to fund future
acquisitions primarily through a combination of working capital, cash flow from
operations and borrowings, as well as issuances of debt and/or equity
securities.  However, no assurances can be given that such funds will be
available when required or on terms favorable to the Company.

The Acquisition agreements, pursuant to which the Operating Centers were
acquired, limit through 1999 the Company's ability to change the location of an
Operating Center's facilities (except for the Montgomery Center), physically
merge the Operating Center's operations with another operation, change the
position of those employees who received employment agreements pursuant to the
applicable Acquisition agreement, reduce the workforce or terminate employees
(except as related to employee performance, the contemplated reorganization of
the combined sales and marketing staff and the consolidation of certain
accounting functions) without the approval of a majority in interest of the
former stockholders of the affected Operating Center. Based on the term of these
limitations and the fact that the Company has been growing and adding
additional employees, the Company does not believe that these limitations will
have a significant impact on the future results of operations and liquidity.

The Company is highly leveraged and has a stockholders' deficit at March 31,
1998.  This indebtedness requires the Company to dedicate a significant portion
of its cash flow from operations to service its indebtedness and makes the
Company more vulnerable to unfavorable changes in general economic conditions.

The Company is aware of the issues associated with the programming code in
existing computer systems as the millenium (Year 2000) approaches.  The "Year
2000" problem is pervasive and complex as virtually every computer operation
will be affected in some way by the rollover of the two digit year value to 00.
The issue is whether computer systems will properly recognize date sensitive
information when the year changes to 2000. Systems that do not properly
recognize such information could generate erroneous data or fail.

                                       10
<PAGE>
 
The Company is using both internal and external resources to identify, correct
or reprogram, and test its systems for Year 2000 compliance. The Company has
performed a preliminary review of its existing computer programs to address the
Year 2000 issue. Based on the preliminary review, the Company believes that the
Year 2000 issue will not have a significant impact on the operations or the
financial results of the Company. The internally developed computer programs
used in the operations of the Company that are expected to be used beyond the
year 1999 are Year 2000 compliant. Additionally, as part of the integration of
the Operating Centers, the Company will be implementing common systems in both
the operations and financial management areas of the Company within the next two
years. The systems implemented or upgraded will all be Year 2000 compliant, one
of the criteria of the systems integration plan. The Company will continue to
assess the impact of the Year 2000 issue as a part of the systems integration
plan. The Company is in the process of contacting all of its software and
hardware suppliers with regard to their respective Year 2000 compliant programs.

 CONSOLIDATED AND COMBINED OPERATING CENTERS AND VIALOG CORPORATION-RESULTS OF
 OPERATIONS

The combined Operating Centers' Statement of Operations data for the three
months ended March 31, 1997 does not purport to present the financial results or
the financial condition of the combined Operating Centers in accordance with
generally accepted accounting principles.  Such data represents merely a
summation of the net revenues and cost of revenues of the individual Operating
Centers on an historical basis, and excludes the effects of pro forma
adjustments.  This data will not be comparable to and may not be indicative of
the Company's post-combination results of operations because the Operating
Centers were not under common control or management.

The following table compares certain unaudited combined data of the Operating
Centers on an historical basis for the three months ended March 31, 1997 and
certain unaudited consolidated data of VIALOG Corporation for the three months
ended March 31, 1998, excluding the effects of pro forma adjustments:
<TABLE> 
<CAPTION> 
                                THREE MONTHS ENDED MARCH 31,
                          --------------------------------------
                                 1997                 1998
                          -----------------    -----------------
                                   (DOLLARS IN THOUSANDS)
<S>                      <C>        <C>        <C>       <C>
Net revenues               $ 8,347   100.0%     $ 11,290  100.0%    
Cost of revenues, 
 excluding depreciation      4,050    48.5%        6,121   54.2%

</TABLE> 

Net revenues. All Operating Centers reflected an increase in net revenues for
the three months ended March 31, 1998 compared to the three months ended March
31, 1997. Net revenues increased $2.9 million, or 35.3%, from combined net
revenues of $8.3 million in 1997 to consolidated net revenues of $11.3 million
in 1998. Overall, the increase was primarily due to increased call volumes for
audio and video conferencing services. The major components of this increase
were (i) an increase in Access' net revenues of $1.3 million, or 44.7%, which
consisted of increased sales of teleconferencing services of approximately
$624,000 and $676,000 to existing and new customers, respectively, including the
introduction of video equipment sales in the first quarter of 1998, (ii) an
increase in TCC's net revenues of $497,000 or 55.7%, which was primarily
attributable to increased audio teleconferencing services to existing customers
and new customers, and (iii) an increase in CSI's net revenues of $497,000, or
32.6%, which consisted of increased net revenues of $447,000 and $50,000 to 
existing and new customers, respectively.

Cost of revenues, excluding depreciation. Consolidated cost of revenues,
excluding depreciation for the three months ended March 31, 1998 increased $2.1
million, or 51.1%, from combined cost of revenues, excluding depreciation for
the three months ended March 31, 1997, and increased as a percentage of revenue
from 48.5% to 54.2% for the three months ended March 31, 1997 and 1998,
respectively. The dollar increase was primarily attributable to (i) an increase
in Access' cost of revenues, excluding depreciation of $834,000, or 66.9%,
resulting from increased telecommunications costs associated with increased call
volumes, and equipment costs related to the introduction of video equipment
sales in the first quarter of 1998 (which generate a lower gross margin than
teleconferencing services), (ii) an increase in CSI's cost of revenues,
excluding depreciation of $341,000, or 61.3%, resulting from increased
telecommunications costs associated with increased call volumes as well as
increased operating costs due to increased staffing to support current and
projected revenue growth, (iii) an increase in TCC's cost of revenues, excluding
depreciation of $324,000, or 81.6%, resulting from increased telecommunications
costs associated with increased call volumes as well as increased operating
costs due to increased staffing to support current and projected revenue growth
and (iv) an increase in Americo's cost of revenues, excluding depreciation of
$200,000, or 66.7%, resulting from increased

                                       11
<PAGE>
 
operating costs due to increased staffing to support current and projected
revenue growth. The increase as a percentage of revenues was primarily
attributable to (a) a change at Access in the utilization of certain personnel
from providing sales support activities during the start-up phase of video
conferencing, the related cost of which was included in selling, general and
administrative expenses during the three months ended March 31, 1997, to being
involved directly in the providing of video conferencing services during the
three months ended March 31, 1998, the related cost of which was included in
cost of revenues, excluding depreciation, (b) additional labor and related
expenses associated with the integration of the Operating Centers and temporary
accelerated hiring and training due to anticipated increases in call volumes,
(c) a modest net decrease in the average price per conferencing minute for
similar types of conferencing services, which resulted in a net decrease to net
revenues of approximately $490,000 based on taking the respective call volumes
for the three months ended March 31, 1998 at the average prices during the three
months ended March 31, 1997 for similar services and (d) additional long
distance charges associated with new Federal Communications Commission fees.

Certain of the Operating Centers have entered into new contracts for long 
distance telephone service. Had these contracts been in effect as of January 1, 
1998, cost of revenues, excluding depreciation for the three months ended March 
31, 1998 would have decreased by approximately $340,000.

 CAUTIONARY STATEMENTS FOR FORWARD LOOKING INFORMATION

Management's discussion and analysis set forth above contains certain forward
looking statements, including statements regarding its financial position and
results of operations.  These forward looking statements are based on current
expectations.  Certain factors have been identified by the Company which could
cause the Company's actual results to differ materially from expected and
historical results.  These factors are discussed in the Safe Harbor for Forward
Looking Statements section of the Management's Discussion and Analysis of
Financial Condition and Results of Operations included in the Company's amended 
Form 10-K for the year ended December 31, 1997, and should be read in
conjunction with this amended Form 10-Q.

                                       12
<PAGE>
 
PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Other than as described below, there are no material pending legal proceedings
to which the Company is a party or to which any of its properties are subject.

In connection with the acquisition of the assets of Call Points, Inc. ("Call
Points"), the Company agreed to assume all disclosed liabilities with the
exception of any liabilities arising out of Equal Employment Opportunity
Commission ("EEOC") claims and litigation filed against Call Points and Ropir
Industries, Inc. ("Ropir"), the sole stockholder and parent corporation of Call
Points, by certain former and current employees. On or about October 30, 1997,
11 employees or former employees of Call Points filed claims in federal district
court (Northern District of Alabama)against Call Points, Ropir and certain other
parties named therein. Complainants in these cases could seek to name the
Company as a defendant in such pending litigation and could seek to hold the
Company liable for damages resulting from the litigation as a successor in
interest to Call Points. In addition to equitable relief, the complainants are
seeking an unspecified amount for back pay, compensatory and punitive damages
and attorneys fees based on allegations of discrimination, retaliation and
racially harassing atmosphere. Although the Company believes it has defenses to
any such claim, there can be no assurance that any such defense would be
successful. The principal stockholder of Call Points agreed to indemnify the
Company from any liability relating to such claims and placed $250,000 of the
proceeds from the sale of the assets of Call Points in escrow with a third party
to secure such indemnification obligations. In light of such indemnification,
the Company does not believe that such claims, if successful, would have a
material adverse effect on the Company.

A former employee of Conference Source International, Inc. ("CSI"), has claimed
in writing that he may be entitled to up to five percent of the stock of CSI,
based on an unsigned paper outlining possible employment terms. Based on the
$18.7 million consideration paid to CSI's stockholders upon the consummation of
the acquisition of CSI by VIALOG Corporation, the value of a five percent equity
interest in CSI would be approximately $934,000. CSI's position is that the only
agreements with such employee were set forth in two successive executed
employment agreements, each of which had a specific provision that such
agreement was inclusive as to the terms of employment. The Company and the
former stockholders of CSI believe that such claim is without merit.

There have been no significant changes to the Company's outstanding litigation
since the filing of the Company's Form 10-K for the twelve months ended December
31, 1997.


ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K

(a)  Exhibits.

     Exhibit 11(a)-Calculation of Shares Used in Determining Loss Per Share

                                       13
<PAGE>
 
                                   SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange
Act of 1934, the Company has duly caused this report to be signed on its behalf
by the undersigned, thereunto duly authorized.



                                               VIALOG Corporation
                                                 (Registrant)
  
Date:  August 13, 1998


                                                 /s/  Glenn D. Bolduc
                                               --------------------------
                                               Glenn D. Bolduc,
                                               President and Chief Executive 
                                               Officer


                                                 /s/  John J. Dion
                                               ----------------------
                                               John J. Dion,
                                               Vice President-Finance
                                               (Principal Financial Officer 
                                               and Principal Accounting Officer)

                                       14
<PAGE>
 
                                 EXHIBIT INDEX


                                                                        PAGE
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11(a)-Calculation of Shares Used in Determining Loss Per Share           16