Unit Description, dTRU
8.3 External Interfaces
P007454A
d
TR
U
View of backplane
Power connector
Y-link/-TX
control bus
Figure 88 dTRU, front panel and backplane
The dTRU has the following external interfaces:
• CDU-TX control bus, IOM bus
• IOM bus, LEDs and buttons interface
• RX (front)
• TX (front)
•
Y-link
8.3.1 Indicators and Buttons
On the front panel there are five indicators (see the following table) and
two buttons, one for TRU Reset, and the other for Local/remote mode
change.
EN/LZT 720 0008 P2A
2001-11-28
157 (485)
© Ericsson Radio Systems AB
— All Rights Reserved —
Preliminary
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