Payload Decompression; Data Decryption; New In This Release; 1.5.3 Release - Comtech EF Data Vipersat CDD-562L User Manual

P r o d u c t D e s c r i p t io n

Payload Decompression

Payload compression condenses the size of data frames and reduces the satellite
bandwidth required to transmit across the link. Configurable on a per route
basis, Payload Compression provides traffic optimization and reduces band-
width up to 40%. The CDD-56X demods perform payload decompression prior
to passing the data onto the LAN.

Data Decryption

The CDD-56X decrypts 3xDES data that it receives. Data encryption, config-
urable on a per route basis, is used to prevent unauthorized access to data over
the satellite link.

New in This Release

The following firmware versions incorporate a number of additional features
and enhancements.

1.5.3 Release

New Redundancy Features

Redundancy Heartbeat Message for Primary Hub Units
Provides the option for a periodic communications check message to be sent
from the Hub modem to the VMS for backup recovery in N:M redundancy
(protected) configurations. This feature allows the message interval to be speci-
fied by the administrator, and can be enabled through either the CLI or the
VMS.

New QoS Features

Dynamic Buffering
Reduction of overall system latency is now optimized in the Vipersat network
by dynamic buffering enhancements that provide a minimum buffer size of 2
MB, with a user-specified latency period (five second maximum).
QoS Rule Switching
With QoS Rule Switching, an STDMA to SCPC switch can be initiated based
upon any type of IP traffic flow that matches a defined QoS queue.
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