EXHIBIT 21.1
SONUS NETWORKS, INC.
SUBSIDIARIES OF THE REGISTRANT
| Name | Jurisdiction of Incorporation |
| Sonus International, Inc. | Delaware |
| Network Equipment Technologies, Inc. | Delaware |
| N.E.T. APLA, Inc. | Delaware |
| Quintum Technologies, LLC | Delaware |
| Sonus Federal, Inc. | Delaware |
| Sonus Securities Corp. | Massachusetts |
| Sonus Networks Australia Pty Ltd. | Australia |
| Sonus Networks Brasil - Redes Tecnólogicas Ltda. | Brazil |
| Quintum International Holdings (BVI) Limited | British Virgin Islands |
| Sonus Networks Corp. | Canada |
| Sonus Networks s.r.o. | Czech Republic |
| Sonus Networks EURL | France |
| N.E.T. Europe SAS | France |
| Sonus Networks GmbH | Germany |
| Sonus Networks (HK) Limited | Hong Kong |
| Quintum Technologies (Hong Kong) Ltd. | Hong Kong |
| Sonus Networks India Private Limited | India |
| Sonus Networks Trading Private Limited | India |
| Nihon Sonus Networks K.K. | Japan |
| N.E.T. Japan, Inc. | Japan |
| Sonus Networks Malaysia Sdn. Bhd. | Malaysia |
| Westford Networks Mexico, S. de R.L. de C.V. | Mexico |
| Sonus Networks (Shanghai) Limited | Shanghai, PRC |
| Sonus Networks Pte. Ltd. | Singapore |
| N.E.T. Southeast Asia Pte. Ltd. | Singapore |
| Sonus Networks España, S.R.L. | Spain |
| Sonus Networks AB | Sweden |
| Sonus Networks Switzerland GmbH | Switzerland |
| Sonus Networks Ltd. | United Kingdom |
| N.E.T. Europe Ltd. | United Kingdom |