Expansion Cross-Connect Module Set
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Features
- Designed Specifically for the DNX-88
- Provides the Non-Blocking 3-1-0 Cross-Connect for the Entire DNX-88 Eight-Nest Node
- Provides Communication Channel and Timing Reference
Introduction
The Expansion Cross-Connect (XCC) Module Set is designed specifically for the DNX-88. In addition to providing non-blocking 3-1-0 cross-connect resources for the entire eight-nest node that comprises a DNX-88 system, the XCC module set provides the communication channel between Nest 1 and Nest 2 through Nest 8 for configuration statistics and alarms. It also provides the timing reference for Nests 2 though 8.
The XCC front card contains the processor subsystem and provides backplane access for traffic originating and/or terminating within Nest 1. The rear card contains the cross-connect fabric and eight link interfaces. Seven of the link interfaces are externally cabled to the other seven DNX nests that make up the node. The eighth interface operates between the front and rear cards and connects the cross-connect fabric to the local DNX backplane.
The cross-connect fabric of the XCC Module Set provides DS0 and DS1 level connections between any DS0, DS1, or group of DS0s in any nest within the node. It is capable of handling various types of connections, including voice or data full duplex, broadcast master, and listeners. The concept of a connection with a DNX-88 node is a source-destination relationship. The DNX-88 source connection is created between the port of interest (T1, E1, DS3, STS-1, HDS3, etc.) and the Expansion Link Card (XLC). The XLC card directly maps backplane timeslots to the X-link interface destined for the XCC.
The XCC module set supports 1+1 module redundancy.