Page 812 of 906 NTDK20 Small System Controller card553-3001-211 Standard 3.00 August 2005The NTDK20GA SSC card has the following components and features:• NTTK25 daughterboard Flash memory, NTAK19 SIMM module(16 MB) DRAM, and Backup memoryNote: The NTTK13 daughterboard is still supported.• up to two 100BaseT IP daughterboards• two PCMCIA sockets• three Serial Data Interface (SDI) ports• 32 channels of Conferencing (64 if one dual-port 100BaseT IPdaughterboard is present, or 96 if two dual-port 100BaseT IPdaughterboards are present)• one 10BaseT port• 30 channels of Tone and Digit Switch (TDS) and a combination of eightDigitone Receivers (DTR) or Extended Tone Detectors (XTD)• additional tone service ports (four units of MFC/MFE/MFK5/MFK6/MFR or eight DTR/XTD units)