Nortel Networks 1000 - Manual (Page 776)

776 NTAK09 1.5 Mb DTI/PRI card
ATTENTION
IMPORTANT!
Each Media Gateway that has a digital trunk must have a clock controller
clocked to an external reference clock.
Note: Clocking slips can occur between systems that are clocked from
different Central Offices (COs), if the COs are not synchronized. The
slips can degrade voice quality.
The purpose of the clock controller interface is to provide the recovered
clock from the external digital facility to the clock controller daughterboard
via the backplane. Depending on the equipped state of the clock controller,
the clock controller interface enables or disables the appropriate reference
clock source, in conjunction with software.
The clock controller interface provides the recovered clock from the
external digital facility to the clock controller daughterboard through the
backplane. Depending on the equipped state of the clock controller, the
clock controller interface enables or disables the appropriate reference
clock source, in conjunction with software.
ATTENTION
IMPORTANT!
Each Media Gateway that has a digital trunk must have a clock controller
clocked to an external reference clock.
Note: Clocking slips can occur between systems that are clocked from
different COs, if the COs are not synchronized. The slips can degrade
voice quality.
Clock rate converter
The 1.5 Mb clock is generated by a Phase-Locked Loop (PLL). The PLL
synchronizes the 1.5 Mb DS1 clock to the 2.56 Mb system clock through
the common multiple of 8 kHz by using the main frame synchronization
signal.
The 1.5 Mb clock is generated by a Phase-Locked Loop (PLL). The PLL
synchronizes the 1.5 Mb DS1 clock to the 2.56 Mb system clock through
the common multiple of 8 kHz by using the main frame synchronization
signal.
The 1.5 Mb clock is generated by a phase-locked loop (PLL). The PLL
synchronizes the 1.5 Mb DS1 clock to the 2.56 Mb system clock through
the common multiple of 8 kHz by using the main frame synchronization
signal.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.