740 of 894 NTAK79 2.0 Mb PRI card | Nortel Networks 553-3001-211

Page 740 of 894 NTAK79 2.0 Mb PRI card

•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

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

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).

553-3001-211 Standard 2.00 September 2004