3.9.5.2.2.3 Team Ringing
This section follows the product behavior described in endnote <57>.
If in the processing of the INVITE based on the routing rules, the proxy decides to honor team ringing, the following actions MUST be taken:
If the address-of-record in the URI of the From field or the Referred-By URI field is present in the team list, the INVITE MUST be routed to primary targets as specified in section 3.9.5.2.2.1.
If the user's presence published in the state category for the container to which the caller belongs, as described in [MS-PRES], is "do-not-disturb", the call MUST be forked to the targets present in the team list and the secondary target timer MUST be started.
If the user’s presence state is not "do-not-disturb", the call MUST be routed to all the registered endpoints of the user. The primary user timer MUST be started.