Avaya 8 Port Digital Card
Avaya 8 Port Digital Card has ports 1- 8 for Digital ports and 9 – 12 for a daughter card to sit on top these are usually ISDN, PRI and Analogue Line cards.
This card sits into one of the 4 slots on the Avaya IP 500 V1 and V2 systems, only Avaya Digital Phones connect to this card, 5400, 9500 series phones. (Note you can run the 4500 series phones but only up a to a certain version)