Microsoft Teams

As we modernize and consolidate services, it's important not to lose sight of the core purpose behind them. In a manufacturing environment, telephony serves as a critical fallback communication tool—often the only means of reaching emergency services when all other infrastructure fails. Additionally, some manufacturing operations require hotline telephony, where simply lifting the handset automatically dials preset numbers. Given this, we must minimize potential points of failure and ensure seamless interoperability between modern and traditional systems. My take would be, 1. Implement a hardwired PBX system for hotlines, ensuring reliable emergency communication. Use fixed phones for common services and DECT for cordless extensions in the production plant to maintain mobility without compromising reliability. 2. Integrate the PBX system with Teams or an IP telephony (IPT) solution to enhance interoperability. 3. Leverage smartphones as an additional option where applicable, keeping in mind that most off-the-shelf models are not intrinsically safe for use in production areas. This approach balances cost-effectiveness with functionality—eliminating recurring subscription costs for plant extensions while maintaining a unified number plan. Moreover, DECT provides nearly double the coverage of Wi-Fi, operates on a separate frequency to prevent interference, and contributes less to floor noise, making it a more suitable choice for industrial environments.

Message retention period cannot not be same across organisation, it’s depends on the regulatory requirements, employee department and seniority of the employee.