WALKair� 1000

Base Station Equipment

Base Station
Through dual polarization, the WALKair 1000 Base Station delivers a capacity of up to 256 Mbps at 2x28 MHz allocation. The BS component of the WALKair system is located at the center of the cell linking the backbone and multiple WALKair Terminal Stations via E1 interfaces. The BS fits conveniently in standard ETSI and 19" racks.

Base Unit
Connecting the backbone and IF Mux of the BS, the Base Station Base Unit leverages FDD duplexing for different Tx and Rx frequencies, while employing TDMA to handle traffic from up to 16 Terminal Stations. Topologies consisting of multiple BS-BUs enable the deployment of a multiple carrier scheme, providing each carrier with a 1.75 MHz slice of the spectrum. The main building blocks of the BU are: the modem, the telecom interface cards and the IF module. Each BU converts the IF signals to telecom voice/data. Each BU contains up to three telecom interfaces, such as E1, V35/X21, Ethernet10/100BaseTand ISDN-BRI, providing diverse voice and data services. The interface cards are installed on daughter boards, enabling maximum flexibility.

IF Mux
The IF Mux multiplexes the Tx signals from the BS-BUs and combines the output signal with a 48V DC power supply. The IF signal is sent to the RFU, located near the Antenna, via a coaxial cable, applying the reverse process for Rx signals. The IF Mux interfaces between the RFU and the BS-BUs and can connect to up to 16 BS-BUs via the SMA ports.

RFU
The RFU interfaces between the IF Mux and the Antenna. The RFU converts the IF signal, received from the IF Mux, to an RF signal. The signal is then amplified for transmission via the Antenna. The RFU is connected to the IF Mux and Antenna with a single coaxial cable.

Access Point
WALKair 1000 features a single Wireless Access Point that combines all business communication services, including Internet, VPN, Leased Line, Ethernet, Frame Relay, POTS and ISDN.