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| Name | Jurisdiction of Incorporation |
| Edgewater Networks, Inc. | Delaware |
| Kandy Communications LLC | Delaware |
| Network Equipment Technologies, Inc. | Delaware |
| Ribbon Communications International Inc. | Delaware |
| Ribbon Communications Federal Inc. | Delaware |
| Ribbon Communications Operating Company, Inc. | Delaware |
| Sonus Networks, Inc. | Delaware |
| GENBAND Inc. | Massachusetts |
| Ribbon Communications (Australia) Pty. Ltd. | Australia |
| Sonus Networks Australia Pty. Limited | Australia |
| GENBAND Belgium SPRL | Belgium |
| Ribbon Communications do Brasil Ltda | Brazil |
| Ribbon Communications Canada ULC | Canada |
| GENBAND Holdings Company | Cayman Islands |
| Ribbon Communications Shanghai Co., Ltd. | China |
| Sonus Networks (Shanghai) | China |
| Ribbon Communications Czech Republic s.r.o. | Czech Republic |
| GENBAND Telecommunications (France) Sarl | France |
| Ribbon Communications France EURL | France |
| Ribbon Communications Germany GmbH | Germany |
| GENBAND Telecommunications (Hong Kong) Ltd. | Hong Kong |
| Ribbon Communications Hong Kong Limited | Hong Kong |
| GENBAND Telecommunications Private Limited | India |
| Sonus Networks India Private Limited | India |
| Ribbon Communications International Limited | Ireland |
| Ribbon Communications Israel Limited | Israel |
| Eclipse Holdings Ltd. | Israel |
| Ribbon Communications Italy SRL | Italy |
| GENBAND Japan GK | Japan |
| Ribbon Communications K.K. | Japan |
| Ribbon Communications Malaysia Sdn. Bhd. | Malaysia |
| GENBAND Mexico, S. de R.L. de C.V. | Mexico |
| Westford Networks Mexico, S. De R.L. de C.V. | Mexico |
| GENBAND New Zealand Company | New Zealand |
| GENBAND Canada B.V. | Netherlands |
| GENBAND Coöperatie U.A. | Netherlands |
