Vertical Communications MBX-IP DTIB24C 4532-24 24 Port Digital Station Card. Interchangeable with Summit-IP 800 DTIB24 (VS-5532-24). Supports Edge 700, SBX Edge 4000, and Legacy Vodavi (TR9000, IN9000, 3500 and 3000 Series) on MBX. Also Supports Edge 9200 and Edge 9000 Series Phones on Summit-IP 800.