Nortel Networks 1000 - Manual (Page 792)

792 NTAK10 2.0 Mb DTI card
Change-of-state microprocessor
The functions of this processor are:
• detecting valid change of state in TS16
• when a valid change has been found, passing the new abcd bits to the
TS16 microprocessor, along with five bits to indicate the associated
channel
The functions of this processor are:
•
detecting valid change of state in TS16.
• when a valid change has been found, passing the new abcd bits to the
TS16 microprocessor, along with five bits to indicate the associated
channel.
The processor detects a valid change of state in TS16 and passes the new
ABCD bits to the TS16 microprocessor, along with five bits to indicate the
associated channel.
Carrier interface
Tx Direction
The HDB3 encoded multiplexer output is sent to the output selector,
which selects the PCM/Data output or the looped around far end data.
The HDB3 is converted from digital to AMI and sent to the carrier. A
transformer provides isolation and impedance matching (75 ohms or 120
ohms).
The HDB3 encoded multiplexer output is fed to the output selector, which
selects the PCM/Data output or the looped around far end data. The
HDB3 is converted from digital to AMI and fed to the carrier. A transformer
provides isolation and impedance matching (75 ohms or 120 ohms).
The HDB3 encoded multiplexer output is sent to the output selector,
which selects the PCM/Data output or the looped around far end data.
The HDB3 is converted from digital to AMI and sent to the carrier. A
transformer provides isolation and impedance matching (75 ohms or 120
ohms).
Rx Direction
The AMI data of the carrier is converted to digital and fed to the input
selector as well as the output selector for far end loopback. Clock recovery
circuitry within the receiving device extracts the 2.0 MHz clock. This clock
generates the frame and multiframe count and sends them to the clock
controller as a reference.The AMI data of the carrier is converted to digital
and fed to the input selector as well as the output selector for far end
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.