Paradise P300 specifications FDC Linkabit Pattern Dependent, 1x10-8error rate Hopeless Data Invert

The following table defines what happens when differing scramblers are interworked

Scrambler

Descrambler

CCITT

INTELSAT

FDC

Linkabit

* Pattern Dependent

CCITT

OK

1x10-8error rate*

Hopeless

Data invert and 1x10-8error rate*

INTELSAT

1x10-8error rate*

OK

Hopeless

Data Invert

FDC

Hopeless

Hopeless

OK

Hopeless

Linkabit

Data invert and 1x10-8error rate*

Data invert

Hopeless

OK

8.10INTERWORKING DIFFERENT MANUFACTURERS EQUIPMENT

Unfortunately not all manufacturers use the same terminology, and so this complicates circuit set up. To the best of our ability the following table shows the equivalence between manufacturers. This table will be extended as information on other products is forthcoming.

Equipment

Scramblers in the columns below are determined to be equivalent

Paradise P300 Series Modem CCITT

Paradise P200 series (closed net)

BPSK requires P300 Tx Spectrum invert

INTELSAT

"Scrambler on"

FDC

Linkabit

Paradise P230 IBS/SMS

FDC SM290 / SM2900 (Viterbi)

FDC SM290 / SM2900 (Sequential)

SSE SM3000/4000 (Viterbi)

SSE SM3000/4000 (Sequential)

EF SDM 300 / 300A (Viterbi)

EF SDM 300 / 300A (Sequential)

(Requires Tx & Rx Spectrum invert on P300 Modem)

Uses synchronous IBS scrambling, so V.35 type not an issue

"V.35"	"FDC"	"Link"
"Link"	"FDC"	"V.35"
"V.35"	"FDC"	"308"
"308"	"FDC"	"V.35"
"IESS
308(V.35)"
"IESS		"IESS
308(V.35)"		308(V.35)"
(300/A set for data		(300/A set for true
invert)		data)

EF SDM 650B

(Requires Tx & Rx Spectrum invert on P300 Modem)

"V.35"

(650B set for data

invert)

"V.35"

(650B set for true

data)

Comstream CM701

Viterbi: BPSK requires P300 Tx/Rx spectrum invert, QPSK is OK

Sequential requires P300 Rx spectrum invert in BPSK and both Tx & Rx spectrum invert in QPSK. See Appendix E: FaultMode=11

"Comstream"

(701 set for data

invert)

"IDR MAN"

"Comstream"

(true data but poss

10-8error rate)

A `compatibility document` which describes interworking tests between the Paradise P300/P400 Modems and other manufacturers modems is available on request.

P300H P300 Series Modem Installation and Operating Handbook Page 153