SB421 outdoor Service box

The SB421 Service Box is designed for out-door use and to be mounted directly on the antenna mast in a distance of up to 150 meters from the base stations. The unit is to be fastened and installed on a mounting plate, which is supplied with the service box – including clamps from 30– 102 mm Ø. As an option mounting kits to fit units up to 200 mm Ø can be supplied. The unit is supplied with individual lock system but can optional be delivered with system lock and system key.
BSC421 Base Station Controller
The core of the BSC421 is a built-in Pentium host computer, and a CF card disc, running the operating system Microsoft Windows WES2009.
In addition to this the system is supplied with built-in Ethernet switch permitting LAN connection to 2 BS421 base stations and WAN connection to the IP backbone and other networks nodes.
The BSC421 base station controller is running the DAMM BSC421 software as well as the DAMM OM software.
Besides of this, it provides a solid platform for TETRA system vendors to integrate their TETRA functionality and applications to the base station controller and the connected BS421.
The host computer contains an USB port, intended for dongle protection of this application software.
The message interface specification to the TETRA Layer 3 software is compatible with the BSC412 used in the DAMM BS41X indoor base stations.
The BSC421 software handles message connections for up to 4 BS421 base stations and secure time and frequency synchronization between the numbers of connected BS421.
It receives the derived GPS synchronization information from one or more of the BS421 and decides the master/salve relations and secures the distribution to all BS421
The OM software is giving control of almost all functions and access to a large number of test points in both SB421, inclusive of the power supply, but also to the number of BS421 connected to the service box. It also makes it possible to do software upgrades and download new software and to supervise diagnostic and control the settings and functionality of the BS421 connected. The OM software can be access either locally or remotely.
Power supply and charging
The SB421 Service Box is equipped with a built-in power supply for connection to 100-240V AC or -48V DC, and offers -48V DC output for own circuits and for 2 DAMM BS421 base stations. The unit includes a rectifier with control and charging circuit for the optional internal battery module or external battery units. The internal battery module supplies battery back-up for up to two hours of operation depending on the number of base stations.
The SB421 is lightening protected by internal circuits. For service and maintenance purposes the unit can easily be dismounted from the mast by means of connection boards, which disconnects all cable connections at the same time
Optional redundant configuration
The SB421 Service Box supplied with BSC421 software for redundant hot stand-by operation of a second service box making it possible to control 4 carriers per site. This configuration offers full redundancy with no single point of failure.

SB421 datasheet (.pdf, 195k)

Characteristics