<PAGE>

                                                                      Exhibit 24

                               POWER OF ATTORNEY


I, Robert P. Collins, a duly elected Director of COMDIAL CORPORATION, a Delaware
corporation, do hereby constitute and appoint Paul K. Suijk, Ralph R. Dyer, and
Carla K. Luke, or any of them, my true and lawful attorneys-in-fact, each with
full power of substitution, for me and in my name, place and stead, in any and
all capacities (including without limitation, as Director of Comdial), to sign
Comdial's Annual Report on Form 10-K for the year ended December 31, 2001, which
is to be filed with the Securities and Exchange Commission, with all exhibits
thereto, and any and all documents in connection therewith, hereby granting unto
said attorney-in-fact and agent full power and authority to do and perform any
and all acts and things requisite and necessary to be done, and hereby ratifying
and confirming all that said attorney-in-fact and agent may do or cause to be
done by virtue hereof. This power of attorney shall not terminate upon my
disability.



Dated:  03/27/02

    /s/ Robert P. Collins
    Robert P. Collins
<PAGE>

                                                                      Exhibit 24

                               POWER OF ATTORNEY


I, Nickolas A. Branica, a duly elected Director of COMDIAL CORPORATION, a
Delaware corporation, do hereby constitute and appoint Paul K. Suijk, Ralph R.
Dyer, and Carla K. Luke, or any of them, my true and lawful attorneys-in-fact,
each with full power of substitution, for me and in my name, place and stead, in
any and all capacities (including without limitation, as Director of Comdial),
to sign Comdial's Annual Report on Form 10-K for the year ended December 31,
2001, which is to be filed with the Securities and Exchange Commission, with all
exhibits thereto, and any and all documents in connection therewith, hereby
granting unto said attorney-in-fact and agent full power and authority to do and
perform any and all acts and things requisite and necessary to be done, and
hereby ratifying and confirming all that said attorney-in-fact and agent may do
or cause to be done by virtue hereof. This power of attorney shall not terminate
upon my disability.



Dated:  03/27/02

    /s/ Nickolas A. Branica
    Nickolas A. Branica
<PAGE>

                                                                      Exhibit 24


                               POWER OF ATTORNEY


I, David P. Berg, a duly elected Director of COMDIAL CORPORATION, a Delaware
corporation, do hereby constitute and appoint Paul K. Suijk, Ralph R. Dyer, and
Carla K. Luke, or any of them, my true and lawful attorneys-in-fact, each with
full power of substitution, for me and in my name, place and stead, in any and
all capacities (including without limitation, as Director of Comdial), to sign
Comdial's Annual Report on Form 10-K for the year ended December 31, 2001, which
is to be filed with the Securities and Exchange Commission, with all exhibits
thereto, and any and all documents in connection therewith, hereby granting unto
said attorney-in-fact and agent full power and authority to do and perform any
and all acts and things requisite and necessary to be done, and hereby ratifying
and confirming all that said attorney-in-fact and agent may do or cause to be
done by virtue hereof. This power of attorney shall not terminate upon my
disability.



Dated:  03/27/02

    /s/ David P. Berg
    David P. Berg
<PAGE>

                                                                      Exhibit 24

                               POWER OF ATTORNEY


I, Sanford Schlitt, a duly elected Director of COMDIAL CORPORATION, a Delaware
corporation, do hereby constitute and Paul K. Suijk, Ralph R. Dyer, and Carla K.
Luke, or any of them, my true and lawful attorneys-in-fact, each with full power
of substitution, for me and in my name, place and stead, in any and all
capacities (including without limitation, as Director of Comdial), to sign
Comdial's Annual Report on Form 10-K for the year ended December 31, 2001, which
is to be filed with the Securities and Exchange Commission, with all exhibits
thereto, and any and all documents in connection therewith, hereby granting unto
said attorney-in-fact and agent full power and authority to do and perform any
and all acts and things requisite and necessary to be done, and hereby ratifying
and confirming all that said attorney-in-fact and agent may do or cause to be
done by virtue hereof. This power of attorney shall not terminate upon my
disability.



Dated:  03/27/02

    /s/ Sanford Schlitt
    Sanford Schlitt