User's Manual

3 Hub Installation Detail – Omni + 4x90
One popular design for the Hub is to transmit from an omnidirectional antenna, as in Figure 3-1,
and receive in 90-degree sectors.
The transmit traffic capacity is 20 Mbps, and each of the receive traffic capacities is 5 Mbps, so
the total receive capacity is equal to the transmit capacity, i.e., 20 Mbps.
Figure 3-1: Omnidirectional transmitter and antenna.
The system diagram is shown in Figure 3-2. The four receive/antenna units connect directly to
the Wireless Cable Modem Termination System (W-CMTS), which is using DOCSIS protocols
to control the subscriber’s wireless cable modems.
The BSR1000W W-CMTS can handle a large number of subscriber’s modems, more than will
normally be in the wireless cell. The specified capacity is 16,000 service flows, so it easily
supports over 1000 cable modems.
June 2003 Page 3-1