SAGEM 3P@C

2.3.2.VDSL Unit Board (VDUB)

1.1.1.5Structure of the VDUB

VDUB is the VDSL office end access service board of 3P@C 4450E. Each VDUB provides 24 VDSL subscriber interfaces. The subscriber interface is connected to the DIN connector on the backplane, thus implementing data transmission via the existing data switching line (such as telephone line) and separation of data transmission from voice transmission.

The VDUB features high security and supports IEEE 802.1Q VLAN to provide secure isolation for each subscriber. In addition, it supports the port locking function to prevent illegal subscribers from accessing the network.

VDUB adopts the -48 V power supply with an allowable voltage ranging from -36 V to -72 V. It supports hot plugging, and can identify the rack slots, thus facilitating the management and maintenance.

When used in 3P@C 4450E, the VDUBs can be inserted in slots 2 ~ 15 of the 10U chassis, as shown in the following figure:

Figure 2-13 Slots of the VDUB

The front view of the VDUB is shown in the following figure:

Figure 2-14 Front view of the VDSL

VDUB running

state LED

Upper puller

adapter

Subscriber interface working state LED

Lower puller adapter

The front panel of VDUB provides two groups of LEDs, as follows:

„VDUB running status indicators RUN and ALM, which are in the upper part of the

3P@C Installation Manual

Page 2-10

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