/mcpC H A P T E R 71 Configure SDP Transparency Profiles • SDP Transparency Profile Overview, on page 853 • SDP Transparency Profile Restrictions, on page 853 • SDP Transparency Profile Prerequisites, on page 854 • Configure SDP Transparency Profile, on page 854 SDP Transparency Profile Overview SDP Transparency Profiles contain a set of rules for declarative SDP attributes that allow the system to pass through declarative attributes that are not natively supported by Unified Communications Manager from the ingress to the egress call leg. Without an SDP transparency profile, Unified Communications Manager drops non-supported SDP attributes. You can configure SDP transparency profiles with multiple rules and apply them to SIP devices via the SIP profile. In order for the SDP transparency profile to be applied, both call legs must be SIP. You can configure the following types of rules for SDP attributes: • Property—If a rule is configured for a property attribute, Unified Communications Manager passes through the SDP attribute unless the attribute has a value. • Any Value—If a rule is configured for any value, the SDP attribute gets passed through so long as it has a value that consists of at least one non-white space character. • Value From List—If a rule is configured using this option, the SDP attribute gets passed through so long as it matches one of the specified values. You can configure up to five possible values SDP Transparency Profile Restrictions The following restrictions apply to SDP transparency profiles. If any of these situations occur on the egress call leg, Cisco Unified Communications Manager will not pass through the declarative SDP attribute: • One or more Media Termination Points (MTPs) or Trusted Relay Points (TRPs) that do not support passthrough are allocated • The Media Termination Point Required check box is checked for the SIP trunk • A transcoder is being used • RSVP is being used Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 853