Vertical Communications SBX-IP CHIB16 4032-16 Combined Hybrid Interface Board 3 CO Line x 16 Digital Station (Only Installs in 4002-03 - 3.0 or Higher Software Required) Circuit Card
Vertical Communications MBX-IP VMIB 4500-80 8 Port 100 Hour Voice Mail Circuit Card. Interchangeable with Vertical Summit-IP 800 VMIB (VS-5500-80) with Firmware Upgrade to Version 2.1Ba or Higher.