The endpoints that allow whiteboarding and annotating on the screen are:
DX80 (Option C):
The Cisco DX80 is a desktop collaboration device that supports whiteboarding and allows users to draw, annotate, and collaborate visually in real-time.
Webex Board (Option E):
The Webex Board is a fully integrated device for team collaboration with capabilities such as whiteboarding, annotating, and content sharing, providing an interactive meeting experience.
Cisco Reference
Further details are available in the product documentation for the Cisco DX Series and Webex Board, highlighting their whiteboarding capabilities.

Cisco offers multiple levels of technical support to cater to different customer needs. The levels of support include:
Basic: Provides essential support, including access to online resources and tools.
Advanced: Adds more in-depth support with additional resources.
Enhanced: Offers a higher level of support with faster response times and more extensive problem resolution.
Premium: Provides the most comprehensive support, including direct access to Cisco experts, proactive monitoring, and advanced troubleshooting.
These support levels are designed to meet the varying requirements of customers, from those needing minimal assistance to those requiring full-scale, hands-on support.

In Webex Calling call queues, the available announcements include:
Welcome: An initial greeting message that plays when a call is placed in the queue.
Hold: A message or music played while the caller is on hold.
Queued: A message indicating the caller's position in the queue.
Overflow: A message that plays when the call queue reaches its maximum capacity and the call cannot be queued.
Cisco Reference
The Webex Calling call queue feature documentation describes the different types of announcements available within call queues.

The Webex Try and Buy Program includes access to Webex conferencing, Webex Teams, and Devices. This program allows potential customers to try the full range of Webex services and devices to experience the features and benefits before committing to a purchase.
Cisco Reference
For more information, refer to Cisco's official documentation about the Try and Buy Program, which outlines what services and devices are included.

Webex Calling offers a Service Level Objective (SLO) for product availability of 99.99%. This SLO represents the uptime percentage that Cisco commits to maintaining for the Webex Calling service, ensuring high availability and reliability for users.
Cisco guarantees this high level of availability by utilizing a globally distributed infrastructure and redundancy across multiple data centers. This approach allows Webex Calling to maintain continuous operation even in the event of localized issues or outages, ensuring users experience minimal service disruption.
To achieve and maintain the 99.99% availability, Cisco employs several key strategies:
Redundant Architecture: The Webex Calling infrastructure is designed with multiple layers of redundancy, including network, server, and data center redundancies.
Continuous Monitoring: Cisco continuously monitors the Webex Calling environment for any signs of potential service degradation and responds quickly to mitigate issues.
Automated Failover: In the event of a failure, the system can automatically switch to backup resources without noticeable downtime to end users.
Regular Maintenance and Upgrades: Cisco regularly performs system maintenance and upgrades during scheduled windows to ensure the platform is running on the latest and most secure infrastructure without affecting service availability.
These measures align with Cisco's commitment to provide a reliable cloud calling solution, making Webex Calling a robust choice for organizations needing consistent, high-availability communication services.