MCK COMMUNICATIONS INC S-1

S-1

MCK COMMUNICATIONS FORM S-1

EX-2.1

STOCK NOTE AND AGREEMENT

EX-2.2

STOCK PURCHASE AGREEMENT

EX-3.1

CERTIFICATE OF INCORPORATION OF MCK COMM

EX-3.4

BY-LAWS OF MCK COMM.

EX-10.1

AMENDED AND RESTATED STOCKHOLDERS AGREEMENT

EX-10.2

AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT

EX-10.3

1996 STOCK OPTION PLAN

EX-10.4

1999 STOCK PLAN

EX-10.5

CLASS A SUBORDINATED NOTE (8,750)

EX-10.6

CLASS A SUBORDINATED NOTE (16,250)

EX-10.7

CLASS A SUBORDINATED NOTE (4,875,500)

EX-10.8

CLASS A SUBORDINATED NOTE (99,500)

EX-10.9

FORM OF STOCK RESTICTION AGREEMENT

EX-10.10

FORM OF PROMISSORY NOTE

EX-10.11

FORM OF PLEDGE AGREEMENT

EX-10.12

FORM OF BONUS AGREEMENT

EX-16.1

CHANGE IN CERTIFING ACCOUNTANTS

EX-23.2

CONSENT OF ERNST AND YOUNG

EX-23.3

CONSENT OF PRICEWATERHOUSE

EX-27.1

FINANCIAL DATA SCHEDULE