Datasheet

SIP Method Method Description
INFO The INFO method is used to notify a SIP client about information regarding the
contact or contacts with whom a specific contact is initiating a message. For
example, in LCS, when a Microsoft Office Communicator 2005 client is Instant
Messaging another user, the
INFO method is used to indicate whether the other
contact is typing a message. The
INFO method is also used with 3PCC gateways
that allow you to control and view events for your desktop phone. These
INFO
messages send commands to the PBX and are used to receive events from the PBX.
INVITE This method initiates a SIP message, including the identifying information for
each SIP client as well as the type of message that is to be exchanged (Instant
Message, Collaboration, etc.). The
INVITE method initiates all sessions and is the
root method for SIP.
MESSAGE The MESSAGE method is used for SIP Instant Messaging sessions. The MESSAGE
method contains the actual text message body that one contact sends to another.
NEGOTIATE The NEGOTIATE method is used to implement settings such as message compres-
sion. When used, this is the first SIP message that servers will exchange after TLS
negotiation has completed and before user-level SIP data is exchanged.
NOTIFY SIP clients receive a NOTIFY method response when a SUBSCRIBE event occurs.
An example of the
NOTIFY method in LCS is when a Microsoft Office Communi-
cator 2005 client receives a notification that they have been added to a contact list.
OPTIONS The OPTIONS method is used by a SIP client to determine which features have
been enabled by the SIP service or other SIP-compliant devices. Regarding Live
Communications Server, the Microsoft Office Communicator 2005 client will ver-
ify the options available for a contact to use during messaging sessions.
REFER The SIP REFER method is more commonly known in the VoIP world for forward-
ing calls. Within Microsoft Office Communicator 2005, you can forward incoming
calls to a mobile phone using the
REFER method.
REGISTER The REGISTER method is used to sign users in using their assigned SIP URI.
SERVICE SIP uses the SERVICE method to add or search for contacts. The SERVICE
method uses Simple Object Access Protocol (SOAP) to carry these data transac-
tions. Remember that the Live Communications Server Back-End Server will
receive data when a user adds a contact to his or her contacts list or changes
other client settings, so the
SERVICE method needs to use a messaging protocol
that is transaction-based in order to do this, i.e., SOAP.
SUBSCRIBE SIP clients use the SUBSCRIBE method to subscribe to specific events, including
presence status and contact settings such as the allow and block profiles. It also
enables clients to be added to contact lists and groups.
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