High density DSX system

Abstract

A DSX system arranged to receive a plurality of high-density chassis is disclosed. The chassis include back planes having rear access IN/OUT fields and rear access cross-connect fields. The rear access fields are electrically connected to termination panels located in respective IN/OUT regions and cross-connect regions. Each of the regions includes cable management channels within which system cables are routed.

1 . A telecommunications device comprising: 
 a rack having a front and a rear;    a plurality of chassis mounted at the front of the rack, the chassis each having a front and a rear, and the chassis each having a height less than 4 inches;    a plurality of jacks mounted in the chassis, the jacks including access ports adapted for receiving plugs, the jacks including normal-through switches having tip and ring springs for contacting the plugs when the plugs are inserted within the access ports, the normal through switches also including normal springs that engage the tip and ring springs when the plugs are not inserted in the access ports, the access ports being accessible from the front of the chassis, the jacks being arranged at a density of at least 40 jacks per foot of chassis width;    cross-connect termination structures positioned at the rear of the chassis;    IN/OUT termination structures positioned at the rear of the chassis;    normal-through circuits that electrically connect the IN/OUT termination structures of each chassis to the corresponding cross-connect termination structures of each chassis, the normal-through circuits including the normal-through switches;    IN/OUT termination panels mounted at the rear of the rack, the IN/OUT termination panels including front and rear sides, the IN/OUT termination panels being arranged in a plurality of vertical columns, the IN/OUT termination panels being electrically connected to the IN/OUT termination structures of the chassis by first interconnect cables that extend through the rack from the IN/OUT termination structures to the front sides of the IN/OUT termination panels;    cross-connect termination panels mounted at the rear of the rack, the cross-connect termination panels including front and rear sides, the cross-connect termination panels being arranged in a plurality of horizontal rows, the cross-connect termination panels being electrically connected to the cross-connect termination structures of the chassis by second interconnect cables that extend through the rack from the cross-connect termination structures to the front sides of the cross-connect termination panels;    the rack including vertical IN/OUT cable management channels positioned between the vertical rows of IN/OUT termination panels for managing IN/OUT cables coupled to the rear sides of the IN/OUT termination panels;    the rack including horizontal cross-connect cable management channels corresponding to at least some of the horizontal rows of cross-connect termination panels for managing cross-connect cables coupled to the rear sides of the cross-connect termination panels; and    the rack including at least one vertical cross-connect cable management channel that is forwardly offset from the horizontal cross-connect cable management channels, the rack also including cable access openings for allowing cross-connect cables to be routed from the vertical cross-connect cable management channel to the horizontal cross-connect cable management channels.