* The Expressway solution can be peered with a Cisco Unified Communications Manager to allow for greater capabilities. This is true because the Expressway-C can connect to the Unified CM via a SIP trunk or a line-side connection, and the Expressway-E can enable firewall traversal and business-to- business communications for the Unified CM endpoints12.
* The Expressway series can never operate as a standalone call-control solution. This is false because the Expressway series can act as a standalone call-control solution for SIP and H.323 endpoints, and can provide interworking between them13.
* The Expressway series requires the peering with a Cisco Unified Communications Manager to act as a call-control device. This is false because the Expressway series does not depend on the Unified CM for call-control functionality, although it can enhance the Unified CM capabilities when peered with it13.
* The Expressway series may operate as a standalone call-control solution. This is true because the Expressway series can support SIP and H.323 endpoints without requiring the Unified CM, and can also provide session management and interworking features13.
* The Expressway series only supports SIP-based communications. This is false because the Expressway series supports both SIP and H.323 protocols, and can interwork between them13. References :
= 1: Cisco Expressway Administrator Guide (X14.0) - Introduction 2: Cisco Expressway Administrator Guide (X15.0) - Unified Communications 3: Concept of Zones Demystified On Cisco Expressway Series

* The Cisco Conductor is a software application that provides intelligent resource management and conference orchestration for video conferencing deployments1.
* The service preference is a configuration option in the Cisco Conductor that defines the order of preference for using different bridge pools for a conference2.
* A bridge pool is a logical grouping of one or more conference bridges that share the same characteristics, such as location, capacity, media encryption, and conference type2.
* The service preference consists of one or more bridge pools and it determines which of these pools, in order of priority, to use for a conference2.
* The service preference is applied based on the conference alias that is used to initiate or join a conference2.
* The service preference does not determine the conference template, the bandwidth, or the conference alias for a conference. These are determined by other factors, such as the call control system, the conference scheduling system, or the conference bridge configuration2.
References := 1: Cisco TelePresence Conductor - Cisco 2: Cisco TelePresence Conductor Administrator Guide (XC4.3) - Service Preferences

12, the Expressway can authenticate devices and users locally or remotely using different methods, such as passwords, certificates, or LDAP. When the Expressway uses local authentication, it verifies the credentials against its local authentication database, which stores the username and password of each account. The password is stored as a salted hash, which means that it is encrypted with a random value to prevent unauthorized access. The username and password are the two elements of authentication credentials that are stored in the local database of the Expressway. The other options, such as crypto hash key, user authority, and CA authority, are not stored in the local database of the Expressway. A crypto hash key is a value that is used to encrypt or decrypt data, but it is not stored in the local database. A user authority is a level of access or privilege that a user has on the Expressway, but it is not stored in the local database. A CA authority is a trusted entity that issues and validates digital certificates, but it is not stored in the local database. References :
= Cisco Expressway Administrator Guide (X14.0) - Device AuthenticationCisco Expressway Administrator Guide (X14.0) - User Accounts

Cisco Spark is a cloud-based collaboration platform that allows users to create, share, and communicate with each other through messaging, calling, and meeting features. Cisco Spark can be integrated with an on- premises solution using hybrid connectors, which are software applications that securely connect Cisco Spark to the organization's premises or to the Cisco Hosted Collaboration Solution (HCS) in a partner cloud. The hybrid connectors enable integration with Cisco Spark for various services, such as calendar, call, directory, media, and serviceability. 12345, three hybrid connectors that allow Cisco Spark to be integrated with an on- premises solution are:
* Calendar Connector: This connector allows users to schedule and join Webex meetings from their Microsoft Exchange or Google Calendar. It also enables features such as One Button to Push (OBTP) and Personal Meeting Room (PMR) for Cisco video devices. The Calendar Connector runs as an application within Cisco Expressway or Enterprise Compute Platform (ECP).
* Call Connector: This connector allows users to make and receive calls from their Cisco Spark app using their existing phone system, such as Cisco Unified Communications Manager or Cisco HCS. It also enables features such as single number reach, call control, and call history. The Call Connector runs as an application within Cisco Expressway or ECP.
* Directory Connect: This connector allows users to synchronize their user directory from their on- premises Active Directory or LDAP server to Cisco Spark. It also enables features such as usersearch, user profile, and user activation. The Directory Connect runs as an application within Cisco Expressway or ECP.
The other options, such as Calendar Aware, Directory Service, and Calendar Service, are not hybrid connectors for Cisco Spark. Calendar Aware is a feature that allows users to see the availability of other users based on their calendar status. Directory Service is a feature that allows users to search and view the contact details of other users. Calendar Service is a feature that allows users to schedule and join meetings from their Cisco Spark app. These features are enabled by the hybrid connectors, but they are not connectors themselves. References := Cisco Spark Hybrid Services Data SheetCisco Spark Hybrid Services - CiscoDeployment guide for Hybrid Calendar - Deploy Expressway-based Hybrid Calendar for Microsoft ExchangeDeployment guide for Hybrid Call Service - Deploy Expressway-based Hybrid Call ServiceDeployment guide for Hybrid Directory Service - Deploy Expressway-based Hybrid Directory Service

= A calls log is a tool that records the details of each call that passes through the Expressway, including the source and destination addresses, the protocol, the call duration, the bandwidth, and the reason for termination. An engineer can use the calls log to check the bandwidth allocation and usage for each call, and to identify any calls that were rejected or downspeeded due to traversal bandwidth restrictions. To access the calls log, go to Status > Calls > History on the Expressway web interface. The calls log can also be exported as a CSV file for further analysis. References := Cisco Expressway Administrator Guide (X15.0) - Calls Log