Page218 of 544 SystemController cards
553-3011-100 Standard14.00 January 2002
This maintains the requirement of a single keycode for each Option 11C
system with survivable IP expansion cabinets. Refer to Table22, “NTDK20
SSC card and Expansion Daughterboard,” on page215 for the location of the
device.
The main objectives of this security scheme are
1to allow the system to operate as a s ingle system when all links are up.
2to allow the Survivable IP Expansion cabinet to continue operating with
its existing configuration in the event of a failure of the Main, or of the
link to the Main.
3to prevent users from configuring or using more TNs or features than
have been authorized.
The IP expansion cabinet security device will provide the following
capabilities at the expansion cabinet:
•System software can be installed but no calls will be processed or
features activated until communication with a main has been established
and a match between the security id of the main and the IP Expansion
cabinet has been confirmed.
•System software can be upgrade d.
•Local data dump is not permitted, as well as all Overlay 43 and
Overlay143 commands.
SDI ports
The NTDK20 SSC card contains three SDI ports used to connect on-site
terminals or remote terminals through a modem. The default settings on the
ports are as follows: