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DIU – DECT Interface Unit The DIU is the heart of the system and acts as the interface to the PSTN. It supports upto 1000 subscribers through 20 Compact base stations and is a fully redundant switch. So whether one needs to increase the network coverage or start giving basic telecom services and internet services from a scratch – DECLoop is the answer. CBS – Compact Base Station The CBS is a small, weather-proof and pole or wall mounted unit which is connected to and remotely powered from the DIU or BSD (see below) through three pairs of copper wires. Each pair carries 144 kbps data and power feed. One CBS serves 50 subscribers in its neighborhood. The CBS provides 12 simultaneous conversations. BSD – Base Station Distributor The BSD is a small unit that enables upto 4 CBS units to be interfaced to the DIU on an El (2.048 Mbps) link. The El link can be over optical fiber, radio, or copper. The BSD can be located as far away from the DIU as the El transmission media. The BSD connects to each CBS on 3 pairs of copper wire and also supplies power to the CBS. The CBS units can be upto 1 km from the BSD. The BSD is powered locally from a -48V battery-backed supply. RBS – Relay Base Station The Relay Base Station extends the range of DECLoop WLL system by relaying DECT connections between the Compact Base Stations (CBS) and Wallset (WS). It consists of and Outdoor and Indoor or ground unit. WS – WallSet The wallset is a fixed subscriber unit mounted in a convenient location at the subscriber's premises. An external antenna may be mounted outside a window or on the roof to increase the radio range to the CBS. A 2-wire interface on the wallset connects to a standard telephone, fax machine or a modem. Battery back-up supports operation in case of mains failure. WS-IP – WallSet IP The Wallset with Internet port (WS-IP) provides Voice connectivity to the subscriber in addition with it has a RS232 port to directly interface with PC’s USB port (Without adding Modem). In fact the WS-IP can support Simultaneous voice and Internet access. With a modem inbuilt, there is no need of a modem in the PC or laptop to surf the internet. It gives a standalone speed of 70 kbps and a sustained speed of 35 kbps when used along with voice simultaneously on the same line. MWS – Multi WallSet Multi Wall Set is a fixed, mains- powered system with external high gain antenna for extended range and supports four subscribers. EMS – Element Management System An Element management system is provided for monitoring and administrating upto 100 DIUs from a central location. The X.25 protocol is employed for communicating between the NMS terminal and DIUs. The interface between the EMS terminal and each DIU is on a 64 kbps bearer. OMC – Operations and Maintenance Console OMC provides facilities for system administration (which involves subscriber administration, E1 line administration, Routing administration, Traffic measurements, Subscriber billing information data base access along-with PSTN and BS administration) & system maintenance. All the OMC functions can be performed from the OMC PC or from a remote location on the Network Management System. OMC is capable of looking after only one DIU unlike the Network Management System, which is meant for multiple DIU’s. The OMC PCs are inbuilt in the DIU unit. For detailed description of these subsystems email us at bbsaccess@bbsgroup.com.sg Or go to the contact us page for more contact details. |
