EXHIBIT 21.1

LIST OF SUBSIDIARIES



|                                          |  |                                                             
|----------------------------------------- |  | ------------------------------------------------------------
|Subsidiary                                |  | State or Other Jurisdiction of Incorporation or Organization
|Ark Electronic Products, Inc.             |  | Florida                                                     
|Astarte Fiber Networks, Inc.              |  | Colorado                                                    
|Communications Equipment Corporation      |  | Delaware                                                    
|Osicom Technologies Europe Limited        |  | United Kingdom                                              
|Paradyne Canada, LTD                      |  | Canada                                                      
|Paradyne Corporation                      |  | Delaware                                                    
|Paradyne Finance Corp.                    |  | Delaware                                                    
|Paradyne Networks do Brazil LTDA          |  | Brazil                                                      
|Paradyne Networks, Inc.                   |  | Delaware                                                    
|Paradyne Shanghai, LTD                    |  | China                                                       
|Paradyne Worldwide Corporation            |  | Delaware                                                    
|PDP Acquisition Corp.                     |  | California                                                  
|Premisys Communications, Inc.             |  | Delaware                                                    
|Premisys Communications Ltd.              |  | United Kingdom                                              
|Relialogic Technology Corporation         |  | California                                                  
|R-Net International, Inc.                 |  | Nevada                                                      
|Sciteq Communications, Inc.               |  | Nevada                                                      
|Simpulan Mutiara Sdn. Bhd.                |  | Malaysia                                                    
|Sorrento Networks Corporation             |  | Delaware                                                    
|Sorrento Networks Europe SA               |  | Belgium                                                     
|Sorrento Networks GmbH                    |  | Germany                                                     
|Sorrento Networks, SA                     |  | France                                                      
|Sorrento Valley Real Estate Holdings, LLC |  | California                                                  
|Vpacket Communications, Inc.              |  | California                                                  
|Xybridge Technologies, Inc.               |  | Texas                                                       
|Zhone International Ltd.                  |  | Cayman Islands                                              
|Zhone International Limited               |  | UK                                                          
|Zhone Technologies Australia PTY LTD      |  | Australia                                                   
|Zhone Technologies B.V.                   |  | Netherlands                                                 
|Zhone Technologies Campus, LLC            |  | California                                                  
|Zhone Technologies De Argentina SRL       |  | Argentina                                                   
|Zhone Technologies do Brasil LTDA         |  | Brazil                                                      
|Zhone Technologies GMBH                   |  | Germany                                                     
|Zhone Technologies, Inc.                  |  | Canada                                                      
|Zhone Technologies International, Inc.    |  | Delaware                                                    
|Zhone Technologies KK                     |  | Japan                                                       
|Zhone Technologies Limited                |  | Hong Kong                                                   
|Zhone Technologies Ltd.                   |  | United Kingdom                                              
|Zhone Technologies Pte. Ltd.              |  | Singapore                                                   
|Zhone Technologies S. de R.L. de C.V.     |  | Mexico                                                      
|Zhone Technologies S.R.L.                 |  | Italy                                                       
|ZTI Merger Subsidiary III, Inc.           |  | Delaware