Final answer:
Telephone communications between an alarm control center and alarmed zones should be an integrated part of the Intrusion Detection System to ensure multi-layered security and real-time verification of credentials. Additionally, advanced technologies such as drone surveillance could complement traditional security measures by providing extended monitoring capabilities.
Step-by-step explanation:
To provide for controlled entry by authorized personnel, telephone communications between an alarm control center and alarmed zones should be considered a critical part of the Intrusion Detection System (IDS). In the context of securing a sensitive area, these communications systems are not just a means of conveying information but serve as a mechanism for verifying and allowing authorized access into protected zones.
Including telephone communications as part of the IDS ensures that there is a multi-layered security protocol, combining physical security measures with technological tools. This integration is vital in maintaining the integrity of the security system, allowing for real-time verification of credentials, and where necessary, enabling immediate human intervention.
The adoption of additional advanced technologies like drone monitoring, as mentioned by Isla, plays a complementary role in the overall security posture. Drones can provide extended surveillance capabilities beyond fixed telephone communications, offering a dynamic response to intrusions and augmenting the effectiveness of traditional alarm systems.