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Page 208 of 544 System Controller cards
553-3011-100 Standard 14.00 January 2002
These cards are:
• the NTDK20 Small System Controller card used with Option 11C and
Option 11C Mini
• the NTDK97 Mini System Controller card (MSC) card used exclusively
with Option 11C Mini when one main chassis and one chassis expander
(only) are connected.
NTDK20 Small System Controller card
The NTDK20 Small System Controller (SSC) card is used with the
Option 11C and Option 11C Mini in an IP Expansion system. It controls call
processing, stores system and customer data, and provides various expansion
interfaces (see Figure 22 on page 215). The NTDK20 SSC card is comprised
of the following components and features:
• Flash daughterboard memory, DRAM and Backup memory
• Two expansion daughterboard interfaces
• One PCMCIA socket
• Three Serial Data Interface (SDI) ports
• 32 channels of Conferencing (64 if two single port Expansion
Daughterboards are present, or 96 if two dual port Expansion
Daughterboards are present)
• One Ethernet (10 Mbps interface) port
• 30 channels of tone and digit switch (TDS) and a combination of eight
Digitone receivers (DTR) or dial tone detectors (XTD)
• Networking and Peripheral Signalling
• Additional tone service ports (four units of MFC/MFE/MFK5/MFK6/
MFR or eight DTR/XTD units)
Memory
The majority of system and customer configured data is both controlled and
stored on the NTDK20 SSC card’s Flash ROM. An active and backup copy
of customer data is also kept on the Flash ROM.