Hardware architecture 39
The System Utility card supports Card ID. The card provides an interface between the security device and the computer, and an interface between the XSM and display panel for each Core/Net card cage. This card also includes a switch on the faceplate to enable or disable the Core cards.
The System Utility Transition card provides connections for the security device, the system monitor, and the status panel. This Transition card is mounted on the rear of the backplane (back side) directly behind the System Utility card.
The cCNI Transition cards provide the cable connections to the 3PE Termination Panel at the back of the module. A cCNI Transition card is mounted directly behind each cCNI card (on the back of the Core backplane). Four cCNI Transition cards for Core/Net module are installed in the factory regardless of how many cCNI main cards are configured for the system.
Network interface
Network switching, based on digital multiplexed loops, interconnects peripheral ports. A loop transmits voice, data, and signaling information over a bidirectional path between the network and peripheral ports.
Network cards digitally transmit voice and data signals, using space switching and Time Division Multiplexing (TDM) technology. Network switching also requires service loops (such as conference and TDS loops), which provide call progress tones and outpulsing.
The following cards provide basic network switching control:
•The NT8D04 Superloop Network card provides switching for four loops grouped together in an entity called a superloop.
•The NT5D12 Digital Trunk card provides switching for two DTI/PRI loops and takes one network slot.
•The NT5D97 Digital Trunk card provides switching for two DTI2/PRI2 loops and takes one network slot.
The NT5D12 and NT5D97 Digital Trunk cards replace the functionality of the QPC720 DTI/PRI and QPC414 Network card, which provided switching for two loops.
Nortel Communication Server 1000
Communication Server 1000M and Meridian 1 Large System Overview
30 September 2008