User outdoor unit
The end user equipment includes an antenna with the AIR transceiver, which allows bidirectional communication with the base station, the AIR settop box (Dolby digital sound)and a standard cable modem for IP traffic and an optional IP or analog telephone(connected to SIP server interface).REMARK:
One antenna can be connected to multiple users.
User outdoor unit
DOWNSTREAM
The AIR transceiver receives the downstream transmission frequency which transports TV and IP (data and voice) content through the dish antenna and filters the signal before down converting it to a UHF signal. The UHF signal is then transmitted through a coaxial cable to a splitter which splits the signal to a cable modem (for IP traffic) and to the AIR receiver box (for TV and RA service). (Multiple AIR settop boxes and modems can be connected to the same outdoor unit)
UPSTREAM
The AIR transceiver receives a DOCSIS/EuroDOCSIS signal, containing upstream IP content, from the cable modem, filters and amplifies it. The signal is then converted to the upstream receiving frequency and transmitted with a typical RF power of 10 dBm (with automatic gain control according to the CMTS instructions) to the antenna and then transmitted through the antenna with a gain of 25 dB (heavily depending on frequency and antenna size). Signal modulation is in accordance with the DOCSIS/EuroDOCSIS standard, the RF power is controlled by the CMTS. Maximum broadband bandwidth per user complies with the DOCSIS/EuroDOCSIS standard. The unit is compatible with DOCSIS/EuroDOCSIS 1.0, 1.1, 2.0, 3.0 and future DOCSIS/EuroDOCSIS standards.
REMARK:
In the case of TV and RA only service a simpler version without a transmitter can be used.
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