The Avaya IP500 Digital Station 8 Base Card has eight DS ports used for connecting Avaya digital phones. An IP500 daughter card can be fitted to add an additional four ports for connections. / RJ45 Ports: 12, DS Ports: 8 of 12 / IP500 daughter card can add up to 4 additional ports / Power failure transfer / Up to four cards per IP500 Control unit / Compatible with the Avaya 2400, 5400, and 6400 series digital telephones