Exhibit 23.4
                                                                  ------------

                  CONSENT OF INTERNATIONAL DATA CORPORATION


Merrill Lynch & Co.
Satyam Infoway Limited


To whom it may concern:

Per our discussion, you have approval to use the following statistics as
stated below.

International Data Corporation, or IDC, estimates that:

     .  The number of Internet users in India will increase from 0.5 million
        at the end of 1998 to 6.6 million at the end of 2002./1/

     .  The installed base of personal and network computers in India will
        increase from 1.9 million at the end of 1998 to 8.2 million at the end
        of 2002./2/

     .  The number of on-line devices in India was 0.3 million in 1998./3/

     .  The number of on-line devices as a percentage of the installed
        computer base in India was 11.0% in 1998./4/

     .  The amount of Internet commerce revenues in India will increase from
        $3.5 million at the end of 1998 to $593.6 million at the end of 2002./5/

     .  The number of Internet users in the United States was 62.8 million at
        the end of 1998./6/

     .  The number of Internet users in the Asia/Pacific region was 10.2
        million at the end of 1998./7/

- ----------------
/1/  IDC Report 19127. Internet India: the One-Rupee Market! p.5.

/2/  IDC Bulletin (Analyst: Richard Jacobson) Asia/Pacific Internet
     Infrastructure, p.2.

/3/  IDC Report 18697, The Internet Market in Asia Pacific (excluding Japan)
     1997-2003, p.120.

/4/  Source: IDC

/5/  IDC Bulletin (Analyst: Richard Jacobson) Asia/Pacific Internet
     Infrastructure, p.2.

/6/  IDC Report 19262, The Global Market Forecast for Internet Usage and
     Commerce, p.17.

/7/  IDC Report 19262, The Global Market Forecast for Internet Usage and
     Commerce, p.19.


     .  The number of on-line devices in the United States was 87.4 million at
        the end of 1998./8/

     .  The number of on-line devices in the Asia/Pacific region was 9.5
        million at the end of 1998./9/

     .  The number of on-line devices as a percentage of the installed
        computer base in the United States was 54.5% at the end of 1998./10/

     .  The number of on-line devices as a percentage of the installed
        computer base in the Asia/Pacific region was 24.9% at the end of
        1998./11/

     .  The total number of Internet users worldwide will increase from
        approximately 140 million at the end of 1998 to approximates 400
        million at the end of 2002./12/

     .  Revenues from Internet services worldwide such as web hosting will
        increase from $0.8 billion at the end of 1998 to $11.8 billion at the
        end of 2002./13/

     .  Revenues from Internet services worldwide such as e-commerce spending
        will increase from $50 billion at the end of 1998 to $774 billion at
        the end of 2002.

                                        Sincerely,

                                        /s/ Hillary DeMello      2-11-200
                                        Hillary DeMello
                                        Corporate Communications Manager





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/8/  IDC Report 19262, The Global Market Forecast for Internet Usage and
     Commerce, p.17.

/9/  IDC Report 19262, The Global Market Forecast for Internet Usage and
     Commerce, p.19.

/10/ IDC Report 19262, The Global Market Forecast for Internet Usage and
     Commerce, p.17.

/11/ IDC Report 19262, The Global Market Forecast for Internet Usage and
     Commerce, p.19.

/12/ IDC Report 19262, The Global Market Forecast for Internet Usage and
     Commerce, p.3.

/13/ IDC Report 19262, The Global Market Forecast for Internet Usage and
     Commerce, p.19.