초록 ▼

A system and method provide for accessing a plurality of communication lines. Each of a number of line access devices is coupled to at least one of the communication lines. A patch circuit, associated with each line access device, provides for manually establishing a cross-connection between a first

A system and method provide for accessing a plurality of communication lines. Each of a number of line access devices is coupled to at least one of the communication lines. A patch circuit, associated with each line access device, provides for manually establishing a cross-connection between a first and second communication line. A bus couples the first communication line with the patch circuit. A locking circuit is coupled to the bus and the patch circuit. The locking circuit selectively enables and disables patch circuit access to the first communication line in response to a control signal. The line access devices may each comprise a single line card or a front and rear line card pair. A redundant power supply arrangement provides for keep-alive backup power for the front line card in response to a failure of primary supply power delivery to the front line card.

대표청구항 ▼

1. A system for providing access to a plurality of communication lines, comprising:a plurality of line access devices, each of the line access devices coupled to at least one of the plurality of communication lines; a patch circuit, provided with each line access device, for manually establishing a

1. A system for providing access to a plurality of communication lines, comprising:a plurality of line access devices, each of the line access devices coupled to at least one of the plurality of communication lines; a patch circuit, provided with each line access device, for manually establishing a cross-connection between a first communication line coupled to the respective line access device and a second communication line of the plurality of communication lines; a bus for coupling the first communication line with the patch circuit; and a locking circuit coupled to the bus and the patch circuit, the locking circuit selectively enabling and disabling patch circuit access to the first communication line.