Nortel Networks 1000 - Manual (Page 903)

Operation 903
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
• provide 4 dB dynamic attenuation pads on a per call basis
•
allow individual units or the entire board to be disabled by software
• provide software selectable A-law or µ-law companding
• indicate self-test status during an automatic or manual self-test
•
provide card-identification for auto configuration, and for determining
the serial number and firmware level of the card
•
convert transmission signals from analog-to-digital and from
digital-to-analog
•
provide termination and trans-hybrid balance impedance to match 600
.
Operation
Each NTCK16AX and NTCK16BX generic Central Office trunk card
supports the following:
•
Loop start operation
•
Battery reversal detection
• Busy tone detection and supervision
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.