Paradise Datacom P300 Series Installation & Operating Handbook page 13

P300 / P310 -IBS Additional Features
INTELSAT Reed-Solomon Feature
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A fully INTELSAT compliant Reed-Solomon Codec providing
Automatic selection of appropriate INTELSAT values of `n, k & t` and interleaving depth for
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data rate & service selected (n, k, t = 126, 112, 7 by default, switching to 225, 205, 10 or 219,
201, 9 with 4/8 deep interleaving as required for IDR & TCM/IDR)
Provides improved low Eb/No performance in framed mode due to use of extended threshold
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frame sync algorithms
Enhanced capabilities with the `Custom Features` feature (see later)
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Wideband IF Feature
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The extension of the 50MHz - 90MHz IF range up to 50MHz - 180MHz
High Date Rate Feature
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The extension of the data rate range to include rates above 512kbps up to 5.0Mbps (depending
on modulation and FEC modes)
Async ESC Feature
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The addition of a high rate async ESC channel, which may be internally linked to the M&C port to
provide control of distant end equipment (in all overhead modes) without additional cabling. The
Async ESC feature provides as follows:
Support for any async ESC rate in Closed Net Plus ESC mode, providing a scalable overhead
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which adds the minimum possible overhead to the satellite data to provide the baud rate
selected (adding from <1% to 100% overhead). Closed Net Plus ESC mode also provides an
optional backward alarm facility and above 32kbps a synchronous scrambler to replace the
normal error multiplying V.35 self synchronising scrambler.
A high rate async ESC channel in IBS/SMS overhead, achieving 2400 Baud with a 64kbps
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carrier (requires IBS/SMS feature, standard on P300-IBS and above)
Async access to the IDR 8kbps synchronous ESC channel. (requires IDR option, standard on
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P300-IDR and above)
Software selectable RS232, RS485 or RS422 interface.
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IBS/SMS Feature
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Satellite Framing in accordance with IBS (to IESS 309) and SMS (EESS 501), including:
User assigned Tx, and corresponding Rx display of, Station ID, Channel ID & Spare ID within
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SMS overhead to aid carrier identification.
A high rate async ESC channel in IBS/SMS overhead (see Async ESC above)
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Drop/Insert Feature
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The most sophisticated Drop/Insert functions of any satellite modem whilst still maintaining
simplicity of configuration and operation. The Drop/Insert feature provides:
1544 kbps T1-D4 & T1-ESF and 2048 kbps G.732 operation
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Arbitrary & independent timeslot selection for Drop & Insert
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Full support for CRC-4 in G.732 mode and CRC-6 in T1-ESF mode
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Terrestrial error monitoring based on Frame Alignment Words (FAW) or CRC
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G.732 `E bit` processing, allowing the display of the outbound terrestrial error rate
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Loopthrough or generation of local bearer onto which to insert the Rx data from any normal
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clock source (eg station clock, clock from satellite, internal clock)
Automatic generation of backup bearer so Rx traffic is not lost if Drop bearer into Tx fails and
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bearer is looped through to the Insert mux to pick up Rx data
Timeslot ID maintenance even with Closed Net Plus ESC carriers
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Enhanced features with the Extended D/I Feature (see later)
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P300H P300 Series Modem Installation and Operating Handbook Page 13