<PAGE>   1
                                                                    Exhibit 12.1
                                POWER OF ATTORNEY



The undersigned who is a director or officer of Cable Link, Inc., an Ohio
     corporation (the "Company");

Does hereby constitute and appoint Bob Binsky and Brenda L. Thompson to be his
     agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
     of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
     of the Company on Form 10-KSB or other appropriate form and any amendments
     or supplements to such Annual Report; and

To execute and deliver any instruments, certificates or other documents which
     they shall deem necessary or proper in connection with the filing of such
     Annual Report, and generally to act for and in the name of the undersigned
     with respect to such filings as fully as could the undersigned if then
     personally present and acting.

Each agent named above is hereby empowered to determine in his discretion the
     times when, the purposes for, and the names in which, any power conferred
     upon him herein shall be exercised and the terms and conditions of any
     instrument, certificate or document which may be executed by him pursuant
     to this instrument.

This Power of Attorney shall not be affected by the disability of the
     undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
     by those laws of the State of Ohio that apply to instruments negotiated,
     executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
     which shall have the same effect as if it were the original instrument and
     all of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 30th day of
     January, 1998.




                                              /s/ Bob Binsky
                                              ----------------------------------
                                              Bob Binsky



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<PAGE>   2



                                POWER OF ATTORNEY



The undersigned who is a director or officer of Cable Link, Inc., an Ohio
     corporation (the "Company");

Does hereby constitute and appoint Bob Binsky and Brenda L. Thompson to be his
     agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
     of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
     of the Company on Form 10-KSB or other appropriate form and any amendments
     or supplements to such Annual Report; and

To execute and deliver any instruments, certificates or other documents which
     they shall deem necessary or proper in connection with the filing of such
     Annual Report, and generally to act for and in the name of the undersigned
     with respect to such filings as fully as could the undersigned if then
     personally present and acting.

Each agent named above is hereby empowered to determine in his discretion the
     times when, the purposes for, and the names in which, any power conferred
     upon him herein shall be exercised and the terms and conditions of any
     instrument, certificate or document which may be executed by him pursuant
     to this instrument.

This Power of Attorney shall not be affected by the disability of the
     undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
     by those laws of the State of Ohio that apply to instruments negotiated,
     executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
     which shall have the same effect as if it were the original instrument and
     all of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 30th day of
     January, 1998.




                                               /s/ Brenda L. Thompson
                                               ---------------------------------
                                               Brenda L. Thompson




                                      -35-
<PAGE>   3



                                POWER OF ATTORNEY



The undersigned who is a director or officer of Cable Link, Inc., an Ohio
     corporation (the "Company");

Does hereby constitute and appoint Bob Binsky and Brenda L. Thompson to be his
     agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
     of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
     of the Company on Form 10-KSB or other appropriate form and any amendments
     or supplements to such Annual Report; and

To execute and deliver any instruments, certificates or other documents which
     they shall deem necessary or proper in connection with the filing of such
     Annual Report, and generally to act for and in the name of the undersigned
     with respect to such filings as fully as could the undersigned if then
     personally present and acting.

Each agent named above is hereby empowered to determine in his discretion the
     times when, the purposes for, and the names in which, any power conferred
     upon him herein shall be exercised and the terms and conditions of any
     instrument, certificate or document which may be executed by him pursuant
     to this instrument.

This Power of Attorney shall not be affected by the disability of the
     undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
     by those laws of the State of Ohio that apply to instruments negotiated,
     executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
     which shall have the same effect as if it were the original instrument and
     all of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 30th day of
     January, 1998.




                                               S/ Zaida Wahlberg
                                               ---------------------------------
                                               Zaida Wahlberg



                                      -36-
<PAGE>   4




                                POWER OF ATTORNEY



The undersigned who is a director or officer of Cable Link, Inc., an Ohio
     corporation (the "Company");

Does hereby constitute and appoint Bob Binsky and Brenda L. Thompson to be his
     agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
     of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
     of the Company on Form 10-KSB or other appropriate form and any amendments
     or supplements to such Annual Report; and

To execute and deliver any instruments, certificates or other documents which
     they shall deem necessary or proper in connection with the filing of such
     Annual Report, and generally to act for and in the name of the undersigned
     with respect to such filings as fully as could the undersigned if then
     personally present and acting.

Each agent named above is hereby empowered to determine in his discretion the
     times when, the purposes for, and the names in which, any power conferred
     upon him herein shall be exercised and the terms and conditions of any
     instrument, certificate or document which may be executed by him pursuant
     to this instrument.

This Power of Attorney shall not be affected by the disability of the
     undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
     by those laws of the State of Ohio that apply to instruments negotiated,
     executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
     which shall have the same effect as if it were the original instrument and
     all of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 30th day of
     January, 1998.




                                               /s/ Richard Rozic
                                               ---------------------------------
                                               Richard Rozic



                                      -37-
<PAGE>   5



                                POWER OF ATTORNEY



The undersigned who is a director or officer of Cable Link, Inc., an Ohio
     corporation (the "Company");

Does hereby constitute and appoint Bob Binsky and Brenda L. Thompson to be his
     agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
     of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
     of the Company on Form 10-KSB or other appropriate form and any amendments
     or supplements to such Annual Report; and

To execute and deliver any instruments, certificates or other documents which
     they shall deem necessary or proper in connection with the filing of such
     Annual Report, and generally to act for and in the name of the undersigned
     with respect to such filings as fully as could the undersigned if then
     personally present and acting.

Each agent named above is hereby empowered to determine in his discretion the
     times when, the purposes for, and the names in which, any power conferred
     upon him herein shall be exercised and the terms and conditions of any
     instrument, certificate or document which may be executed by him pursuant
     to this instrument.

This Power of Attorney shall not be affected by the disability of the
     undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
     by those laws of the State of Ohio that apply to instruments negotiated,
     executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
     which shall have the same effect as if it were the original instrument and
     all of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 30th day of
     January, 1998.





                                               /s/ Eric S. Newman
                                               ---------------------------------
                                               Eric S. Newman



                                      -38-
<PAGE>   6



                                POWER OF ATTORNEY



The undersigned who is a director or officer of Cable Link, Inc., an Ohio
     corporation (the "Company");

Does hereby constitute and appoint Bob Binsky and Brenda L. Thompson to be his
     agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
     of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
     of the Company on Form 10-KSB or other appropriate form and any amendments
     or supplements to such Annual Report; and

To execute and deliver any instruments, certificates or other documents which
     they shall deem necessary or proper in connection with the filing of such
     Annual Report, and generally to act for and in the name of the undersigned
     with respect to such filings as fully as could the undersigned if then
     personally present and acting.

Each agent named above is hereby empowered to determine in his discretion the
     times when, the purposes for, and the names in which, any power conferred
     upon him herein shall be exercised and the terms and conditions of any
     instrument, certificate or document which may be executed by him pursuant
     to this instrument.

This Power of Attorney shall not be affected by the disability of the
     undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
     by those laws of the State of Ohio that apply to instruments negotiated,
     executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
     which shall have the same effect as if it were the original instrument and
     all of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 30th day of
     January, 1998.





                                               /s/ Sherry J. Rothfield
                                               ---------------------------------
                                               Sherry J. Rothfield



                                      -39-
<PAGE>   7




                                POWER OF ATTORNEY



The undersigned who is a director or officer of Cable Link, Inc., an Ohio
     corporation (the "Company");

Does hereby constitute and appoint Bob Binsky and Brenda L. Thompson to be his
     agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
     of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
     of the Company on Form 10-KSB or other appropriate form and any amendments
     or supplements to such Annual Report; and

To execute and deliver any instruments, certificates or other documents which
     they shall deem necessary or proper in connection with the filing of such
     Annual Report, and generally to act for and in the name of the undersigned
     with respect to such filings as fully as could the undersigned if then
     personally present and acting.

Each agent named above is hereby empowered to determine in his discretion the
     times when, the purposes for, and the names in which, any power conferred
     upon him herein shall be exercised and the terms and conditions of any
     instrument, certificate or document which may be executed by him pursuant
     to this instrument.

This Power of Attorney shall not be affected by the disability of the
     undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
     by those laws of the State of Ohio that apply to instruments negotiated,
     executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
     which shall have the same effect as if it were the original instrument and
     all of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 30th day of
     January, 1998.




                                               /s/ Michael Tsao
                                               ---------------------------------
                                               Michael Tsao


                                      -40-