Comtech EF Data MDX420 SkyWire Manual - Manual (Page 20)

MDX420 SkyWire™ Satellite Network Gateway Introduction
MN-MDX420 Revision 6 1–4
1.4 SkyWire TDMA Network
The MDX420 gateway is designed for mesh communications. The gateway will transmit on a fixed carrier
frequency and has the capability to receive up to 4 other carriers either on the same satellite or other
satellites. A TDMA shared carrier can support up to 8 gateways all communicating on the same
frequency allocation.
A SkyWire gateway determines the number of bursts it will transmit over satellite. The number of burst
slots per frame is based on the local LAN needs and the needs of the other remotes in the share group.
The gateway uses this information in conjunction with the operator specified Dedicated Information Rate
(DIR), Committed Information Rate (CIR), and Maximum Information Rate (MIR) to determine how many
burst slots it is allocated per frame.
Dedicated Information Rate - throughput in Kbits per second that cannot be used by anyone except the
assigned gateway.
Committed Information Rate – throughput that is available to the user when ever requested, but is pooled
when not in needed by the assigned gateway.
Maximum Information Rate – maximum throughput allowed by the gateway also referred to as the
burstable throughput.