Sagem 4450E - Manual (Page 33)

SAGEM 3P@C
3P@C Installation Manual
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2.3.2. 2.3.2. 2.3.2. 2.3.2. VDSL Unit Board (VDUB)
1.1.1.5 1.1.1.5 1.1.1.5 1.1.1.5 Structure 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