ZXCBTS (V5.4) CDMA Micro Base Transceiver Station & Remote Station Installation Manual
13-4
DC micro-BTS
Combinational
power supply
-48V(1)
-48V(2)
485/dry contact
Fiber 1 (SDH)
Fiber 2 (SDH)
E1(1)
E1(2)
E1(3)
E1(4)
Transmission
interface
Power supply
interface
Built-in
SDH
Fig. 13.1-2 Solution (II) of Micro-BTS Integration
In this solution, a ZTE ZXSM T150 transmission system serves as the built-in SDH
system, and a suitable ZTE power system model may serve as the outdoor
combinational power supply. On the power interface side, the combinational power
provides two -48V power outputs to supply power for the micro-BTS and the built-in
SDH, Furthermore, the combinational power system provides the secondary power-off
function to guarantee power supply for the built-in SDH in precedence. The monitor
part and the transmission interface part are the same as those in Solution I.
If the backup power is not available, the built-in SDH is also supported. However, the
secondary power-off function cannot be implemented. To reduce power interfaces, the
power of the built-in SDH can be supplied by the micro-BTS. In this case, a built-in
24V power and an SDH board are needed. Without the support of the backup power, if
the electric power network is of poor quality, to reduce the influence of transmission
interruption on the network due to power failure, it is recommended the configuration
be used in a single station application only to avoid complicated SDH transmission
networking.
13.1.3 Module Layout of the Integrated Micro-BTS and RF Remote Station
Fig. 13.1-3 shows the module layout inside the ZXCBTS integrated micro-BTS:
