Reference signal generation and management in SDH-WDM-based equipment and networks

Author

Kihara, Masami ; Hisadome, Kenji

Author_Institution

NTT Network Innovation Lab., Kanagawa, Japan

Volume

1

fYear

1999

fDate

1999

Firstpage

300

Abstract

This paper describes a new system that functions as both conventional SDH Equipment Clock (SEC) and a new reference signal generation and management device. The system is basically intended for new telecommunication networks based on a combination of Synchronous Digital Hierarchy (SDH) and Wavelength Division Multiplex (WDM) techniques. The new processor-based system is composed of decision-making and selection circuits for reference signals, and advanced 155 MHz phase-locked oscillators (PLO) for generating the SDH frequency, IPPS time signal. This configuration can also achieve highly reliable signal generation and autonomous management independently of conventional network operation systems

Keywords

clocks; computerised instrumentation; reference circuits; signal generators; synchronous digital hierarchy; telecommunication computing; timing circuits; transfer standards; wavelength division multiplexing; 155 MHz; IPPS time signal; SDH; SDH equipment clock; SDH frequency; SDH-WDM-based equipment; Synchronous Digital Hierarchy; WDM; Wavelength Division Multiplexing; autonomous management; decision-making circuits; phase-locked oscillators; reference signal; reference signal generation; selection circuits; telecommunication networks; Clocks; Intelligent networks; Optical fiber networks; Optical filters; Optical network units; Repeaters; Routing; Signal generators; Synchronous digital hierarchy; Wavelength division multiplexing;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European

Conference_Location

Besancon

ISSN

1075-6787

Print_ISBN

0-7803-5400-1

Type

conf

DOI

10.1109/FREQ.1999.840766

Filename

840766