363-206-305
Circuit Pack Descriptions
7-94
Issue 3 June 2000
CDTU Faceplate Controls and Indicators
7
The CDTU circuit pack faceplate controls and indicators are shown in Figure 7-38.
Figure 7-38. AUA421 CDTU Circuit Pack
DSXBIU Circuit Pack Description
7
The Digital Signal Cross-Connect Backplane Interface Unit (DSXBIU) is a
Narrowband shelf circuit pack that operates as the local controller for the
Narrowband shelf and multiplexes the DS0 signals from the channel units to DS1
interfaces. The DS1 interface is fed from the DSXBIU to a DS1 circuit pack on the
Wideband shelf. Software for the DSXBIU may be downloaded from the SLC-2000
host digital terminal.
The DSXBIU interfaces to the 12 channel units on the Narrowband shelf,
providing provisioning and inventory information, as well as clock generation and
synchronization. The DSXBIU communicates with the common units via a serial
protocol microwire link. A separate microwire RS-422 interface connects with the
power supply unit. A bank control link on the DSXBIU is used to communicate with
the channel units.
DSXBIU Faceplate Controls and Indicators
7
The DSXBIU circuit pack faceplate controls and indicators are shown in
Figure 7-39.
FAIL
BUSY
Lucent
AUA421
CDTU
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