KX-NCP1290CJ (serv.man2) - Panasonic PBX Service Manual (repair manual). Page 8

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8
KX-NCP1290CJ
3.2.2.
ISDN Primary Rate Interface Function
3.2.2.1.
Line Interface Outline
The reference point of the line interface on the PRI30 card is Point S/T (Point U is not supported.) and the external and internal
line modes are supported as operating mode.
Also, the PRI23/PRI30 cards employ the PRI-IC (IC301) as the IC for Interface. See the "Line Interface Block" or the outline of
the interface connection. Shows the characteristics of the PRI-IC.
See the PRI-IC data sheet for detailed specifications.
Characteristics of the PRI-IC
3.2.2.2.
Line Interface Loopback
This card has a relay for loopback test on the primary side of the line to cut and divide into the line failure or the PBX's own fail-
ure, when there is a defect in operation.
Shows The outline diagram of the line interface loopback.
Outline diagram of the line interface
Item
Contents
Remarks
Line Extraction Clock
2.048MHz/PRI30
 
DPLL
Low Jitter DPLL for clk generation (IC302)
 
Elastic Buffer
Two-frame elastic buffer (Rx & Tx)
 
Signaling Controller
• HDLC Controller 
• CAS Controller
• Multiframe synchronization and synthesis ITU-T G.732 etc.
 
FIFO
64Byte x 2     128Byte x 3
 
PCM Highway Interface
2.048Mbps highway Interface
 
µP-Interface
8bit parallel Bus (Intel/Motorola)
Used Intel Mode for PRI30 Card.
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