High-Quality Communication: Provide crystal-clear audio and video for one-to-one and group calls, with minimal latency even in low-bandwidth scenarios.

Client-Server End-to-End Encryption: Calls must be fully encrypted to prevent unauthorized access and ensure privacy. 

Cross-Platform Compatibility: Ensure consistent functionality across desktop and mobile devices. 

Real-Time Chat: Enable secure instant messaging for individuals and groups, with synchronized chat histories across devices.

File and Media Sharing: Support encrypted sharing of files, images, videos, and other media, ensuring the integrity and confidentiality of transferred data. 

Location Sharing: Allow secure, optional sharing of user locations for enhanced collaboration in field operations.

Message Retention Policies: Include customizable options for message expiry and retention, with server-side enforcement.

Secure Collaboration: Allow users to securely share their screens during calls or meetings, ensuring that only authorized participants can view the shared content.

Quality and Performance: Deliver high-resolution screen sharing with low latency for a seamless experience.

Granular Controls: Provide presenters with options to control access, pause sharing, or restrict visibility to specific applications or windows.

Granular Role-Based Access Control: Allow administrators to assign roles with varying levels of permissions, such as user, moderator, and administrator roles.

Session Management: Enable real-time monitoring and control of active sessions, including the ability to terminate sessions if necessary.

User Segregation: Implement multitenant architecture to ensure strict segregation of users between departments or organizations, with fully customizable Visibility Rules.

Multiparty Audio and Video Calls: Support high-capacity group calls with customizable bandwidth configurations to face different usage scenarios.

Group Chats: Provide persistent and secure group messaging with files, media and location sharing.

Intuitive Design: Deliver a user experience similar to popular consumer-grade applications, ensuring ease of adoption with minimal training.

Customizability: Allow customization of the user interface to reflect organizational branding or customer preferences.

Mobile Optimization: Provide fully functional mobile clients optimized for smartphones and tablets.

Authentication Layer: Require users to authenticate for all communication activities, ensuring authorized access.

Security Logs: Maintain secure logs of communication events for compliance and auditing purposes.

Auditing Option: Possibility to enable auditing features for audio/Video calls.

Data Integrity Checks: Use cryptographic methods (e.g., SHA-256) to ensure that all transferred data remains unaltered.