Avaya TN2224B 2-Wire Digital 24 Port Circuit Pack

The TN2224B provides twenty-four DCP ports that can connect to two-wire terminals such as the 2400, 6400, 8400, or 9400 series digital voice terminals and the 302C attendant console. The TN2224B is the updated equivalent of the older TN2224 with enhanced firmware, a 24-MHz microcontroller, and 48k of addressable external RAM.