Cables to Go CDM-570L manual Release

Product Description

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.

Burst Fast Acquisition Timing (BFAT)

The BFAT feature provides dramatic reduction in data acquisition times for Vipersat modems operating in STDMA (burst) mode at low data rates (64 kbps to 256 kbps). Preamble size is automatically recalculated and adjusted by the modem for optimum performance. This feature can be enabled in modems oper- ating at 3/4 QPSK.

STDMA Slot Quantization

Utilizing Turbo FEC Block mode, Vipersat STDMA Slot Quantization automat- ically sizes the data slot to hold an integral number of FEC blocks, based on the current data rate. This results in increased STDMA efficiency.

RTP Inactivity Timeout

The timeout period for Real-time Transfer Protocol (e.g., voice, video) data flows is now set for 10 seconds of inactivity to reduce the wait period until the next switch state occurs, thus increasing SCPC bandwidth utilization.

Parameter File Consolidation

Configuration parameters for the entire CDM-570/570L modem (base modem plus IP router module) are now stored in one common parameter file. All

Chapter 1 - General 1-7