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NTCK16 Generic Central Office Trunk cards Page 781 of 894
Circuit Card Description and Installation
Physical description
The NTCK16AX and NTCK16BX generic Central Office trunk cards have
eight units. Each unit connects to the shelf backplane through an 80-pin
connector. The backplane is cabled to the I/O panel which is then cabled to
the cross-connect terminal. At the cross-connect terminal, each unit connects
to external apparatus by Tip and Ring leads.
Switch settings
There are no option switches on the NTCK16AX and NTCK16BX generic
Central Office trunk cards. All settings are configured in software.
Self-test
When the NTCK16AX and NTCK16BX trunk cards are installed and power
is applied to them, a self-test is performed on each card. The red LED on the
faceplate flashes three times, then remains continuously lit until the card is
enabled in software. If the self-test fails, the LED remains lit.
Functional description
The NTCK16AX and NTCK16BX generic Central Office trunk cards
support up to eight analog Central Office trunks. They can be installed in any
IPE slot.
Both cards are exactly the same except for the Periodic Pulse Metering (PPM)
feature. The NTCK16AX card supports internal 12/16 kHz PPM but the
NTCK16BX card does not.
Common features
The NTCK16AX and NTCK16BX generic Central Office trunk cards:
• support the North American loss plan
• support loop start signalling
• support busy tone detection and supervision on a per unit basis.
• support battery reversal detection