public class SIPExtension : SIPUAS, 
	ISIPExtension, IPBXSIPClient, IExtensionBase, IUserAgentInstance, ISIPClientCommon

Public Class SIPExtension
	Inherits SIPUAS
	Implements ISIPExtension, IPBXSIPClient, IExtensionBase, IUserAgentInstance, 
	ISIPClientCommon

public ref class SIPExtension : public SIPUAS, 
	ISIPExtension, IPBXSIPClient, IExtensionBase, IUserAgentInstance, ISIPClientCommon

type SIPExtension =  
    class
        inherit SIPUAS
        interface ISIPExtension
        interface IPBXSIPClient
        interface IExtensionBase
        interface IUserAgentInstance
        interface ISIPClientCommon
    end