Blended Identity of Alpha URI and Number

D.

Cisco Unified Communications Manager supports blended addressing of directory URIs and directory numbers.

When blended addressing is enabled across the network, Cisco Unified Communications Manager inserts both the directory URI and the directory number of the sending party in outgoing SIP Invites, or responses to SIP Invites.

The destination endpoint has the option of using either the directory URI or the directory number for its responseboth will reach the same destination.

Cisco Unified Communications Manager uses the x-cisco-number tag in the SIP identity headers to communicate a blended address.

When both a directory URI and directory number are available for the sending phone and blended addressing is enabled, Cisco Unified Communications Manager uses the directory URI in the From fields of the SIP message and adds the x-cisco-number tag with the accompanying directory number to the SIP identity headers.

The x-cisco-number tag identifies the directory number that is associated with the directory URI.

References: http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/10_0_1/ccmfeat/CUCM_BK_F3AC1C0F_00_cucm-features-services-guide-100/ CUCM_BK_F3AC1C0F_00_cucm-features-services-guide-100_chapter_0110011.html#CUCM_RF_D0008C2B_00

The tag in the SIP header that is used by Cisco Unified Communications Manager to deliver a blended identity of alpha URI and number is option E, x-cisco-uri.

SIP (Session Initiation Protocol) is a signaling protocol used for controlling and initiating communication sessions such as voice and video calls over IP networks. When a call is made using SIP, the SIP messages contain several headers that carry information about the call, including the identity of the calling and called parties.

Cisco Unified Communications Manager (CUCM) is a call-processing system that uses SIP to establish and manage calls. One of the features of CUCM is the ability to deliver a blended identity of alpha URI and number to the called party. The alpha URI is a user-friendly identifier, such as a name or a description, that is associated with a phone number.

To deliver this blended identity, CUCM includes the alpha URI in the SIP header using the x-cisco-uri tag. This header field is used to convey a URI that identifies the originator or target of a SIP request, and it is not standardized by the SIP protocol.

In summary, the correct answer is E, x-cisco-uri, because it is the SIP header tag used by CUCM to deliver a blended identity of alpha URI and number.