Introduction; Description; Need For Synchronization - Nortel Succession 1000 Installation And Configuration Manual

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Introduction

Description

Need for synchronization

553-3001-201 Standard 1.00
Clock Controller description and installation
This chapter introduces the NTRB53 Clock Controller, and provides
procedures on how to install this clock controller on Large Systems.
The NTRB53 Clock Controller replaces the QPC471H and QPC775F in new
systems. QPC471H and QPC775F Clock Controllers continue to be
supported.
Note 1: The NTRB53 Clock Controller cannot be combined with a
QPC775 or a QPC471 card in one system
The illustrations used in the description section depict a Small System.
However, the system can also be representative of a Large System.
This section provides an overview on the use of clock controllers. For Large
Systems, the following clock controllers are supported:
• NTRB53
• QPC471
• QPC775
Note: Clock controllers cannot be mixed in one system.
The NTRB53 Clock Controller is available for all markets. The QPC471
Clock Controller is available for U.S. markets. Vintages A through G of the
QPC471 Clock Controller can be used in one system; vintage H of QPC471
Clock Controllers cannot be mixed with clock controllers of other vintages.
The QPC775E Clock Controller card is available for only Canadian and
International markets.
Digital trunking requires synchronized clocking so that a shift in one clock
source will result in an equivalent shift of the same size and direction in all
parts of the network.
October 2003