Specifications of Grandstream PBX: The Grandstream PBX operates on IP technology, supporting external lines and internal transfers, with call recording for both outgoing and incoming calls for up to 12 months. - Voicemail for each user. - Comprehensive reports on outgoing and incoming calls. - Ability to connect company branches, whether local or international, without requiring any additional licenses or costs. - A phone with a 2.4-inch color screen that operates on PoE and supports video calls. - It holds American and European quality certifications and is accredited by various government entities inside and outside the Kingdom. - Supports 1 to 8 external lines. - 100 internal extensions. - 30 simultaneous calls. - Supports calling the company number from outside. - Supports transferring the caller to the extension number they dialed directly. - Supports call recording. - Call holding features. - Call forwarding capabilities. - Call monitoring. - Backup options. - Call waiting. - Supports video calls.