EXHIBIT 21.1

AVAYA INC.

Subsidiaries of the Registrant



|                                                  |  |                                              
|------------------------------------------------- |  | ---------------------------------------------
|Company Name                                      |  | Jurisdiction/State of Incorporation/Formation
|3102455 Nova Scotia Company                       |  | Canada                                       
|AC Technologies Inc.                              |  | Delaware, US                                 
|Avaya (China) Communication Co. Ltd.              |  | China                                        
|Avaya (Dalian) Intelligent Communication Co. Ltd. |  | China                                        
|Avaya (Gibraltar) Investments Limited             |  | Gibraltar                                    
|Avaya (Japan) Ltd.                                |  | Japan                                        
|Avaya (Malaysia) Sdn. Bhd.                        |  | Malaysia                                     
|Avaya Argentina S.R.L.                            |  | Argentina                                    
|Avaya Asset Management GmbH & Co. KG              |  | Germany                                      
|Avaya Australia Pty LTD.                          |  | Australia                                    
|Avaya Austria GmbH                                |  | Austria                                      
|Avaya Belgium SPRL                                |  | Belgium                                      
|Avaya Beteiligungs GmbH                           |  | Germany                                      
|Avaya Brasil LTDA.                                |  | Brazil                                       
|Avaya CALA Inc.                                   |  | Delaware, US                                 
|Avaya Canada Corp.                                |  | Canada                                       
|Avaya Capital Ireland (Ireland incorp)            |  | Ireland                                      
|Avaya Capital Ireland (UK incorp)                 |  | United Kingdom                               
|Avaya Chile Limitada                              |  | Chile                                        
|Avaya CIS LLC                                     |  | Russian Federation                           
|Avaya Communication de Colombia S.A.              |  | Colombia                                     
|Avaya Communication de Mexico S.A. de C.V.        |  | Mexico                                       
|Avaya Communication Israel Ltd.                   |  | Israel                                       
|Avaya Comunicación España S.L.U.                  |  | Spain                                        
|Avaya Cyprus Investments Limited                  |  | Cyprus                                       
|Avaya Czech Republic s.r.o.                       |  | Czech Republic                               
|Avaya d.o.o. (Croatia)                            |  | Croatia                                      
|Avaya d.o.o. (Slovenia)                           |  | Slovenia                                     
|Avaya Denmark ApS                                 |  | Denmark                                      
|Avaya Deutschland GmbH                            |  | Germany                                      
|Avaya Dutch Holdco B.V.                           |  | Netherlands                                  
|Avaya ECS Limited                                 |  | United Kingdom                               
|Avaya Egypt LLC                                   |  | Egypt                                        
|Avaya EMEA Ltd.                                   |  | Delaware, US                                 
|Avaya Enterprises Ireland Limited                 |  | Ireland                                      
|Avaya Enterprises S.R.L.                          |  | Romania                                      
|Avaya Federal Solutions, Inc.                     |  | Delaware, US                                 
|Avaya Finland Oy                                  |  | Finland                                      
|Avaya France SAS                                  |  | France                                       
|Avaya GCM Sales LImited                           |  | Ireland                                      
|Avaya German Holdco GmbH                          |  | Germany                                      
|Avaya Germany GmbH                                |  | Germany                                      
|Avaya GmbH & Co. KG                               |  | Germany                                      
|Avaya Government Solutions Inc.                   |  | Delaware, US                                 
|Avaya Holding EMEA BV                             |  | Netherlands                                  
|Avaya Holdings Limited                            |  | Ireland                                      
|Avaya Holdings LLC                                |  | Delaware, US                                 



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|                                                                         |  |                                              
|------------------------------------------------------------------------ |  | ---------------------------------------------
|Company Name                                                             |  | Jurisdiction/State of Incorporation/Formation
|Avaya Holdings Two, LLC                                                  |  | Delaware, US                                 
|Avaya Hong Kong Company Limited                                          |  | Hong Kong                                    
|Avaya Hungary Ltd./Avaya Hungary Communication Limited Liability Company |  | Hungary                                      
|Avaya India (SEZ) Pvt Ltd                                                |  | India                                        
|Avaya India Private Limited                                              |  | India                                        
|Avaya Integrated Cabinet Solutions Inc.                                  |  | Delaware, US                                 
|Avaya International Enterprises Ltd.                                     |  | Ireland                                      
|Avaya International Sales Limited                                        |  | Ireland                                      
|Avaya Ireland Limited                                                    |  | Ireland                                      
|Avaya Italia S.p.A.                                                      |  | Italy                                        
|Avaya Korea Ltd.                                                         |  | Korea, Republic Of                           
|Avaya Limited                                                            |  | United Kingdom                               
|Avaya Luxembourg Investments S.a.r.l.                                    |  | Luxembourg                                   
|Avaya Luxembourg Sarl                                                    |  | Luxembourg                                   
|Avaya Macau Limitada                                                     |  | China                                        
|Avaya Management Services Inc.                                           |  | Delaware, US                                 
|Avaya Mauritius Ltd                                                      |  | Mauritius                                    
|Avaya Nederland B.V.                                                     |  | Netherlands                                  
|Avaya New Zealand Limited                                                |  | New Zealand                                  
|Avaya Norway AS                                                          |  | Norway                                       
|Avaya Panama Ltda.                                                       |  | Panama                                       
|Avaya Peru S.R.L.                                                        |  | Peru                                         
|Avaya Philippines, Inc.                                                  |  | Philippines                                  
|Avaya Poland Sp. z.o.o.                                                  |  | Poland                                       
|Avaya Puerto Rico, Inc.                                                  |  | United States                                
|Avaya Real Estate Management GmbH                                        |  | Germany                                      
|Avaya Sales Limited                                                      |  | Ireland                                      
|Avaya Singapore Pte Ltd                                                  |  | Singapore                                    
|Avaya Slovakia s.r.o.                                                    |  | Slovakia                                     
|Avaya Sweden AB                                                          |  | Sweden                                       
|Avaya Switzerland GmbH                                                   |  | Switzerland                                  
|Avaya UK                                                                 |  | United Kingdom                               
|Avaya UK Holdings Limited                                                |  | United Kingdom                               
|Avaya Venezuela S.R.L.                                                   |  | Venezuela                                    
|Avaya Vertriebs GmbH                                                     |  | Germany                                      
|Avaya Verwaltungs GmbH                                                   |  | Germany                                      
|Avaya World Services Inc.                                                |  | Delaware, US                                 
|Integrated Information Technology Corporation                            |  | Illinois, US                                 
|Mosaix Limited                                                           |  | United Kingdom                               
|Network Alchemy Ltd.                                                     |  | United Kingdom                               
|Nimcat Networks General Partnership                                      |  | Canada                                       
|Octel Communications LLC                                                 |  | Delaware, US                                 
|Octel Communications Ltd.                                                |  | United Kingdom                               
|Octel Communications Services Ltd.                                       |  | United Kingdom                               
|P.T. Avaya Indonesia                                                     |  | Indonesia                                    
|PT Sierra Communication Indonesia                                        |  | Indonesia                                    
|Rhetorex Europe Ltd.                                                     |  | United Kingdom                               
|Sierra Asia Pacific Inc.                                                 |  | Delaware, US                                 
|Sierra Communication International LLC                                   |  | Delaware, US                                 
|Soundlogic Acquisition ULC                                               |  | Canada                                       
|Spectel (UK) Limited                                                     |  | United Kingdom                               
|Spectel Limited                                                          |  | Ireland                                      



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|                                        |  |                                              
|--------------------------------------- |  | ---------------------------------------------
|Company Name                            |  | Jurisdiction/State of Incorporation/Formation
|Spectel Operations Limited              |  | Ireland                                      
|Spectel Research Limited                |  | Ireland                                      
|Spectel Systems Limited                 |  | Ireland                                      
|Technology Corporation of America, Inc. |  | Delaware, US                                 
|Tenovis Comergo GmbH                    |  | Germany                                      
|Tenovis Direct GmbH*                    |  | Germany                                      
|Tenovis Netherlands BV                  |  | Netherlands                                  
|Tenovis SRL, Italy                      |  | Italy                                        
|Tenovis Telecom Frankfurt GmbH & Co. KG |  | Germany                                      
|Ubiquity Software Corporation           |  | Delaware, US                                 
|Ubiquity Software Corporation Limited   |  | United Kingdom                               
|VPNet Technologies, Inc.                |  | United States                                
|Windward Corp.                          |  | Cayman Islands                               
|ZAO Avaya                               |  | Russian Federation                           



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