During the VSAT days : SCPC (single channel per carrier) is a long used and proven technology which stands out for it's high reliability, bandwidth efficiency and flexibility. Separate channels are used for both uplink / downlink each being assigned a unique frequency. You will be able to define your uplink and downlink bandwidth at your own will in order to take the best out of the service. SCPC service suits best: - Corporations - Medium size enterprises - Hotels - ISPs Then there this : SCPC / DVB : Means SCPC uplink, return via DVB. All uplinks are more expensive than downlinks, except in SCPC case. Then this eg : Services are delivered from the powerful Eutelsat<http://www.isatasia.com/intro/asiasat2.php> *W1*, *Telstar 12*, *Eutelsat W5*, *Sesat 2*, *Hellasat-2, Newskies* (NSS6 , NSS7 ) and *Eutelsat W3A *satellites, respectively, in C-band , Ku band and Ka band, respectively, to ensure highest service reliability (99.95% service uptime guaranteed) in the challenging weather conditions of covered countries. What is important is criteria of service. Infact, most serious VSAT operators will even tell you the estimated max number of computers that the service is recommended on. I'm sure there are many gurus on the list who can add. Rgds.