The role of the conference alias in the Cisco Conductor is to be dialed by a user and Conductor uses that alias to determine the conference template. This is because the conference alias is a unique identifier for a conference that is configured on the Conductor. The conference alias can be a SIP URI, an H.323 ID, or an E.164 number. When a user dials the conference alias, the Conductor matches the alias to a conference template, which defines the settings and parameters for the conference, such as the bridge pool, the media resources, the layout, the encryption, and so on1.
The other options are not correct because:
It determines the bridge pool to be selected for a conference: This is not true, as the bridge pool is determined by the conference template, not the conference alias. The bridge pool is a group of conference bridges that can host the conference. The conference template specifies which bridge pool to use for a conference, based on the priority, availability, and load balancing of the bridges2.
The conference template determines the bridge pool to be selected for a conference: This is true, but it does not describe the role of the conference alias, which is the question. The conference template determines the bridge pool, but the conference alias determines the conference template1.
It selects the Expressway to used for media traversal: This is not true, as the Expressway is not involved in the selection of the conference alias or the conference template. The Expressway is a network device that provides firewall traversal, NAT, and encryption services for video communications. The Expressway does not have the capability to select or configure conferences or conference aliases3.
References := 1: Cisco TelePresence Conductor with Cisco Unified Communications Manager Deployment Guide (XC4.0) - Configuring Conference Aliases [Cisco TelePresence Conductor] - Cisco 2: Cisco TelePresence Conductor with Cisco Unified Communications Manager Deployment Guide (XC4.0) - Configuring Conference Templates [Cisco TelePresence Conductor] - Cisco 3: Cisco Expressway Basic Configuration Deployment Guide (X12.6) - Introduction [Cisco Expressway Series] - Cisco
