User's Manual

Doc. No.
Rev.
Date
DRAFT
1.01
2012-01-27
Damm Cellular Systems A/S, Denmark
TetraFlex
®
7.5 Manual - SB421
TetraFlex® 7.5 Manual 1-2
1.1 SB421
1.1.1 Environmental / climatic requirements
The SB421 (Service Box) is designed for outdoor operation, in such a way that it can be
placed in the antenna mast close to the Base station(s)
The Service Box is designed to be able to operate at severe environmental conditions.
The Service Box is guaranteed to operate from –20°C to +55°C with optional battery and –
25°C to +55°C with CF card operation without battery. Maximum SB421 cabinet temperature
is +70°C. Storage temperature for the SB421 is from –40°C to +85°C.
Note that the guaranteed MTBF data is valid only when operating within the specified
temperature range
Screening of SB421 to specific customer defined operating temperature range (from -40°C to
+55°C ambient air temperature) is optional upon request.
The Service Box encapsulation complies with IP65
1.1.2 Placement
The recommended placement of the Service Box is as close to the base station(s) as
possible to reduce possibility of system failure due to LAN cable being interrupted.
The placement of the Service Box shall be such that it is securely fastened to a mast or
building that is able to carry the weight of the SB421 and withstand the local environmental
conditions. All cables etc. shall be properly fastened to the mast or building using appropriate
fixtures as to avoid damage to the equipment and possible injury to persons.
1.1.3 Grounding
The BS requires careful grounding.
Grounding is important to protect the equipment when inserting / removing cables and to
protect the operator from faulty equipment.
An effective grounding is also important to protect the installation during thunderstorms
(lightning).