Glossary; A P P E N D I X - Comtech EF Data Vipersat CDM-570 User Manual

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LOSSARY
ACK
A signal used in computing and other fields to indicate acknowledgement, such
as a packet message used in TCP to acknowledge the receipt of a packet.
ACM
Adaptive Coding and Modulation – A technique that optimizes throughput in a
wireless data link by adapting the forward error correction code rate and the
modulation order according to the noise conditions (or other impairments) on
the link. A feature that is supported in CEFD modems such as the CDM-840
Remote Router.
ARP Address Resolution Protocol – A protocol for a LAN device to determine the
MAC address of a locally connected device given its IP address. See also MAC.
ASR Automatic Switch Request – A switch request message generated by older
Vipersat modems (e.g., CDM-570/L) that is sent to the VMS to establish a new
satellite link or adjust bandwidth between source and destination IP addresses.
Base The main component in a satellite communications modem that consistes of a
Modem
circuit board with the modem hardware and firmware and the associeated inter-
faces.
A p p e n d i x E - G l o s s a r y
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P P E N D I X
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