Nortel Networks 553-3001-211 manual 766 of 894 NTBK50 2.0 Mb PRI card

Page 766 of 894 NTBK50 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

•support of National and International bits in timeslot 0

•clock controller daughterboard

•D-channel interface daughterboard

•downloadable D-channel handler daughterboard

•32 software-selectable Tx and 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 NTBK50 architecture are:

•DS-30X interface

•A07 signaling interface

•digital pad

•carrier interface

•CEPT transceiver

•SLIP control

•D-channel support interface

•clock controller interface

•Card-LAN / echo / test port interface

•80C51FA Microcontroller

DS-30X interface

NTBK50 interfaces to one DS-30X bus which contains 32-byte interleaved timeslots operating at 2.56 Mb. Each timeslot contains 10 bits in A10

553-3001-211 Standard 2.00 September 2004