IP Phone & PABX System refers to the private telephone network used within a business or organization. A PABX (Private Automatic Branch Exchange) acts as the central hub for all internal phones and manages their connection to the outside world. Most modern systems are now IP-PABX (Internet Protocol) based, utilizing VoIP (Voice over Internet Protocol) technology. This allows calls to be transmitted over the internet (or a company's data network) instead of traditional analog lines. This offers greater flexibility, lower call costs, and easy integration with computer systems. Auto Attendant (IVR): An automated greeting and menu system that directs incoming calls (e.g., "Press 1 for Sales, Press 2 for Support"). Call Transfer and Forwarding: Allows employees to seamlessly transfer a call to another extension or forward their calls to a mobile phone when they are away. Voicemail: Provides a dedicated, private voicemail box for every extension. Conference Calling: Supports multiple internal and external parties joining a single call. Call Queuing: Manages high volumes of incoming calls by placing callers in a waiting line with music or announcements.