What is CUG (Closed user group)

Definition:
- A Closed User Group (CUG) refers to a specific group of users who have exclusive access to a particular communication network or system.
Telecommunications Context:
- In the telecommunications industry, CUG members can only make and receive calls within the user group.
Benefits and Use Cases:
- Enhanced Security: By limiting access to authorized members, CUGs prevent unauthorized users from connecting to the network.
- Cost Savings: CUGs allow free or reduced-cost communication within the group, making it economical for businesses, organizations, or communities.
- Privacy: Members can communicate confidentially within the closed network.
- Business Applications: CUGs are commonly used in corporate environments, government organizations, and community groups.
Example Scenario:
- Imagine a company with a large sales team. The company sets up a CUG for its sales representatives.
- Within this CUG, salespeople can call each other without incurring additional charges.
- Calls to external numbers (outside the CUG) are billed separately.

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