XVSAT
The ESA Switched VSAT project will initially run for 18 months starting about 1st June 1995. The system will give experience of ATM networking, and provide interconnection between 3 main ESA sites (Villafranca (S), ESTEC (NL), and Darmstadt (D). Further terminals may later be deployed.
ESTEC, SAIT, NERA A/S, Telenor, MPR TelTech
ESA
Operational
Deployment 1996
Ku-Band on Intelsat VII with NORSAT-B terminal 3.5m Antenna, 100W HPA.
Adaptive FDMA ( An adaptive FDMA modem is being developed which will allocate bandwidth in increments of 64 kbps. Reallocation will take 1.5 seconds, posing potential problems for dynamic management of the ATM bandwidth. Each station will be able to transmit/receive 4 carriers. Broadcast will be supported.)
n x 64 kbps < 3 Mbps
Internally ATM LAN (The design is based on a commercial ATM switch to be manufactured by MPR.) Two services will be provided:
CBR using the Continuous Bit-Oriented Service (CBOS) (E1 emulation over AAL1)
VBR using Connection-Less Packet Service (CLPS) (IP over AAL5) Multicast support will be provided for the CLPS.
Q.921.
Enet (AAL5) or G.703 / E1 (ETSI 130.0.011) using (AAL1)