PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 63

• Manufacturer Part Number: PEF2091
• Description: ICs for Communications(ISDN Echocancellation Circuit)
• Manufacturer: Siemens Semiconductor Group

Figure 19
Semiconductor Group
Transmitter Scrambler in NT, NT-PBX and TE Mode without Loop-Back 3
Ds
Di
Transmitter Scrambler for all LT Modes and for Loop-Back 3 in all NT Modes
Ds
Di
Receiver Descrambler for all LT Modes and for Loop-Back 3 in all NT Modes
Ds
Do
Receiver Descrambler in NT, NT-PBX and TE Mode without Loop-Back 3
Ds
Do
Scrambler / Descrambler Algorithms
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-1
-1
-1
-1
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63
Ds = Di
Ds = Di
Do = Ds (1
Do = Ds (1
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-1
Ds
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Ds
Ds•x
Ds
Ds
Ds
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-18
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-18
-5
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+
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Ds
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Ds
x
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•
Functional Description
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)
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)
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Data Sheet 01.99
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-1
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-1
PEB 2091
PEF 2091
Ds
Ds
Ds
Ds
•
•
•
•
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x
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x
-23
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