Nortel-networks Circuit Card Bedienungsanleitung Seite 752

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Page 752 of 906 NTAK79 2.0 Mb PRI card
553-3001-211 Standard 3.00 August 2005
monitoring of receive carrier alarms including AIS, LOS, and RAI
transmission of remote alarm when instructed
slip-buffering receive messages
supporting National and International bits in time slot 0
on-board clock controller
onboard D-channel interface
32 software-selectable Tx & Rx Pad values
conversion of PCM commanding Laws (A-A, u-u, A-u, u-A)
Card-LAN for maintenance communication
Architecture
The main functional blocks of the NTAK79 architecture include:
DS-30X interface
A07 signaling interface
digital pad
carrier interface
CEPT transceiver
•SLIP control
D-channel support interface
8031 microcontroller
Card-LAN / echo / test port interface
DS-30X interface
The NTAK79 interfaces to one DS-30X bus which contains 32
byte-interleaved timeslots operating at 2.56 Mb. Each timeslot contains
10 bits in A10 message format; eight are assigned to voice/data (64 kbps),
one to signaling (8 kbps), and one is a data valid bit (8 kbps).
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