This type of card can be added to an IP Office 500 Digital Station card, IP Office 500 Analog Phone card, or IP Office 500 VCM card. It allows that card to then also support up 4 BRI trunk connections, each trunk providing 2B+D digital channels.
Product also known as:
Avaya 700417413, IPO 500 TRNK ANLG 4 UNI, 700417413, 700417413