� Original Grandstream IP PBX Central Office | Linking Branches and Recording Calls Without License Fees Looking for a professional central office to manage your company's communications with high efficiency? We provide the original Grandstream IP PBX central office, the ideal solution for companies, institutions, shops, factories, clinics, and hotels, with the possibility of future expansion without the need to pay license fees. Key Features: ✅ Supports landlines, SIP Trunk, and Internet calls (VoIP). ✅ Links all company branches internally and externally, regardless of distance. ✅ Records and saves calls for long periods. ✅ Easily transfers calls between employees. ✅ Voicemail for each user. ✅ Detailed reports for incoming, outgoing, and missed calls. ✅ Creates automated transfers (IVR) for professional customer service. ✅ Supports up to 100 internal extensions and more depending on the model. ✅ HD voice quality and high call clarity. ✅ No annual license fees or subscriptions. ✅ Supports working with Grandstream phones and other IP phones.