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Each of these four formats has up to 32 unique pad values. The NTAK10 card
provides the pad values of -10, -9, -8, -7, -6,-5, -4, -3, -2, -1, 0, 0.6, 1, 2, 3, 4,
5, 6, 7, 8, 9, 10, 11, 12, 13, and 14 dB (also idle and unassigned code). A
negative pad is a positive gain.
The pad PROM output is converted from parallel to serial format and passed
on to a multiplexer, which passes PCM/data, TS0, and TS16 information. The
FAS pattern is sent in even TS0s, while in odd TS0s alarm information is sent.
The multiplexer output is fed to the carrier interface which can forward it to
the carrier or perform per channel loopback.
Receive data
To receive data, PCM/Data from the carrier interface is converted from serial
to parallel, is buffered, and is fed to the pad prom. It then sent onto the DS-
30X interface, where signaling information from the signaling interface
circuitry is multiplexed.
DS-30X microprocessor
The DS-30X is a utility processor, responsible for the following tasks:
•
controlling the DS-30X interface
•
receiving and decoding of messages and taking appropriate action
•
transmitting TS16 messages to the TS16 microprocessor
•
receiving TS16 messages from the TS16 microprocessor and passing
these messages to the A07
•
providing the 19.2 Kbps serial interface to the Card-LAN
•
controlling LEDs
•
downloading LCAs
•
monitoring errors and alarms
•
detecting the change of state in TS0, and outputting TS0 data
•
counting bipolar violations, slips, PLL alarms, frame-alignment errors,
and CRC-4 errors
•
monitoring the status of frame alignment and multiframe alignment
•
detecting and reporting of alarm indication signals (AIS)
NTAK10 2.0 Mb DTI card
Option 11C and 11C Mini
Page 471 of 544
Technical Reference Guide
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