User Manual

Chapter 2 - Installation Installing the Base Transceiver Station (BTS) Equipment
4Motion 87 System Manual
6 Connect the DATA port of the NPU to the backbone data equipment (use a
straight Ethernet cable to connect to a hub/switch/router). The maximum
length of the Ethernet cable is 100m when operating at 100 Mbps and 70m
when operating at 1 Gbps.
7 If the MGMT port is used for remote management, connect it to the
appropriate data equipment (use a straight Ethernet cable to connect to a
hub/switch/router). The maximum length of the Ethernet cable is 100m.
8 Connect the DC power cable to the power jack of the PIU module. If a
redundant PIU is installed, connect a DC power cable also to the second PIU
module. Connect the power cord(s) to the -48 VDC power source(s), as follows.
» Black wire to the 48 VDC contact of the power source.
» Red wire to the + (Return) contact.
» Ground wire to the ground.
2.3.9.2 Air Ventilation Unit (AVU)
The 2U high, 84 HP wide AVU includes a 1U high integral chamber for inlet
airflow and a 1U high fan tray with an internal alarm module. To support a high
availability BTS, the fan tray includes 10 brush-less fans, where 9 fans are
sufficient for cooling a fully loaded chassis. To further support high availability,
the chassis can operate with the hot-swappable fan tray extracted from it for a
period of time sufficient for replacing it (up to 10 minutes).
Figure 2-27: AVU Drawer Front Panel