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<concept xml:lang="en" id="GUID-128F20B1-4293-59C5-99B5-83BF43CA2F01"><title>List of Classes</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>The following classes are available as a part of the SIP Client API: </p> <p> <xref href="GUID-AFB2603A-8A35-3E70-8EC2-229C9726F00B.dita"><apiname>CSIP</apiname></xref>, <xref href="GUID-059F9C3A-EA04-3295-912F-50444F073CE7.dita"><apiname>CSIPClientTransaction</apiname></xref>, <xref href="GUID-2A070F4D-A35B-3505-BE86-E6C7A2F27B94.dita"><apiname>CSIPConnection</apiname></xref>, <xref href="GUID-382BC1BE-3CF3-3E81-B1FF-341EEF2B67EA.dita"><apiname>CSIPDialog</apiname></xref>, <xref href="GUID-9841AF1A-B8CF-3BA1-8445-93064549AE8C.dita"><apiname>CSIPDialogAssocBase</apiname></xref>, <xref href="GUID-B4A2FBBD-2B5F-3E64-800D-C4E9203679A8.dita"><apiname>CSIPInviteDialogAssoc</apiname></xref>, <xref href="GUID-77CFD812-7238-3B84-80FF-475BD73C3506.dita"><apiname>CSIPMessageElements</apiname></xref>, <xref href="GUID-72F96612-A95C-3066-BFF0-2E288C945A2A.dita"><apiname>CSIPNotifyDialogAssoc</apiname></xref>, <xref href="GUID-A40E3FE5-B7BE-39CD-ADBF-A38A21B1CF8D.dita"><apiname>CSIPreferDialogAssoc</apiname></xref>, <xref href="GUID-3C166C85-6E17-323B-9CD3-B3E2836DC1C3.dita"><apiname>CSIPRefresh</apiname></xref>, <xref href="GUID-48AA01D5-CE7B-3C22-B2E0-529261121EC4.dita"><apiname>CSIPRegistrationBinding</apiname></xref>, <xref href="GUID-19FB031A-CFA7-3C67-A627-CFF501060AA5.dita"><apiname>CSIPRequestElements</apiname></xref>, <xref href="GUID-13F32052-70BE-3B4D-9F8B-DF2DABB896B0.dita"><apiname>CSIPResponseElements</apiname></xref>, <xref href="GUID-7E54C95E-5155-30B1-8169-A59778774403.dita"><apiname>CSIPServerTransaction</apiname></xref>, <xref href="GUID-9539CAEE-28AE-3134-8415-EEBCBCDA4D18.dita"><apiname>CSIPSubscribeDialogAssoc</apiname></xref>, <xref href="GUID-93256B64-49C9-37F1-9A4E-72C521759749.dita"><apiname>CSIPTransactionBase</apiname></xref>, <xref href="GUID-F9FBAFBE-A895-3FD3-A526-604A6C9E035D.dita"><apiname>CSIPHttpDigest</apiname></xref>, <xref href="GUID-B889A3FD-3B14-3785-90AE-3546F0C9A5D4.dita"><apiname>MSIPConnectionObserver</apiname></xref>, <xref href="GUID-FA0A893D-E3E3-33F8-9C63-B2A6A2A053EF.dita"><apiname>MSIPHttpDigestChallengeObserver</apiname></xref>, <xref href="GUID-64AD3756-2FEC-37CB-9A31-838738DEC03D.dita"><apiname>MSIPHttpDigestChallengeObserver2</apiname></xref>, <xref href="GUID-C6FF4A83-0097-3A82-B4ED-802E1FEA05D1.dita"><apiname>MSIPObserver</apiname></xref>, <xref href="GUID-F0663140-8AF3-3831-A741-483D276BF91C.dita"><apiname>MSIPRegistrationContext</apiname></xref>. </p> </conbody></concept>