PABX System Capacity: Basic 4 CO lines, 8 extensions (408), expand to 416, 424, 432, 832, 848 Multiple ... communication line PABX System Capacity: Basic 4 CO lines, 8 extensions (408), expand to 416, 424, 432, 832, 848 Main ... in one cartonGiftbox size: 59×37×16cmCarton size: 61×36×39.5cm