KX-NCP1280XJ - Panasonic PBX Service Manual (repair manual). Page 8

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KX-NCP1280XJ
4.2.2.
Local Highway Interface Function
This card utilizes an 2.048 Mbps local highway and local TSW for the purpose of switching the communications channel (B ch.)
detected from the ISDN main interface by the PSB21150, with the CT bus interface. (eSAMSON internal module)
Figure illustrates the B ch. Highway assign and eSAMSON/PSB21150 input/output timing. Refer to the eSAMSON specifica-
tions and PSB21150 databook.
Bch highway assign & eSAMSON/PSB21150 input/output timing
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