Table of Contents
Advertisement
Page 482 of 544
Environment
Architecture
DS-30X interface
553-3011-100
Standard 14.00
NTAK79 2.0 Mb PRI card
The NTAK79 meets all applicable Nortel Network's operating specifications.
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
A description of each block follows.
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; 8 are assigned to voice/data (64 Kbps), one to signaling
(8 Kbps), and one is a data valid bit (8 Kbps).
The incoming serial bit stream is converted to 8-bit parallel bytes to be
directed to padding control.
The signaling bits are extracted and inserted by the A07 signaling interface
circuitry. Following is the mapping of the DS-30X timeslot number to the
PCM-30 channel number. Timeslots 0 and 16 are currently unused for PCM.
January 2002
Hide quick links:
Advertisement
Chapters
Table of Contents
