0001104659-02-000674 Sample Contracts

JOINT FILING AGREEMENT

Joint Filing Agreement • March 12th, 2002 • Kohler Gary S • Telephone communications (no radiotelephone)

• Contract Type
  Joint Filing Agreement
• Filed
  March 12th, 2002
• Company
  Kohler Gary S
• Industry
  Telephone communications (no radiotelephone)

This Agreement may be executed in counterparts and each of such counterparts taken together shall constitute one and the same instrument.

AGREEMENT AND PLAN OF REORGANIZATION

Agreement and Plan of Reorganization • March 12th, 2002 • Kohler Gary S • Telephone communications (no radiotelephone)

• Contract Type
  Agreement and Plan of Reorganization
• Filed
  March 12th, 2002
• Company
  Kohler Gary S
• Industry
  Telephone communications (no radiotelephone)

See the Agreement and Plan of Reorganization, dated as of February 27, 2002, by and among ChoiceTel Communications, Inc., CC Merger Corp. and Sontra Medical, Inc., incorporated by reference herein to the Form 8-K filed by the Company on March 5, 2002, File No. 000-23017.

FORM OF CC VOTING AGREEMENT

Stock Voting Agreement • March 12th, 2002 • Kohler Gary S • Telephone communications (no radiotelephone) • Delaware

• Contract Type
  Stock Voting Agreement
• Filed
  March 12th, 2002
• Company
  Kohler Gary S
• Industry
  Telephone communications (no radiotelephone)
• Jurisdiction
  Delaware

THIS STOCK VOTING AGREEMENT (“Stock Voting Agreement”) is made and entered into as of February 27, 2002 by and among Sontra Medical, Inc., a Delaware corporation (“SM”), and each of the shareholders of ChoiceTel Communications, Inc., a Minnesota corporation (“CC”), listed on Annex A and executing a counterpart signature page hereto (each, a “Holder”).