Compact Communication System Supporting 128 User Flexible Pabx Hub. Scalable Capacity: Supports up to 8 external lines and 128 internal extensions. OEM/ODM Service: Professional manufacturer offering flexible customization options. Cost-Effective Design: Low-cost professional telephone switching system for universal use. Free Intercom: All extensions can make internal calls for free. Digital Phone Support: Compatible with analog phones and specific digital keyphones. Remote Programming: Technicians provide remote assistance for programming issues. PC Software Option: Special models support PC software for easier programming. ISO9001 Certified: Manufacturing process certified under ISO9001:2015 standards.