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Synchronization of POTS Systems Connected over Ethernet
Linköping University, Department of Electrical Engineering.
2005 (English)Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesis
Abstract [en]

POTS (Plain Old Telephony Service) systems have traditionally been connected via synchronous connections. When installing new nodes in the telephone network, they may sometimes be connected via packet networks such as Ethernet. Ethernet is an asynchronous network which means that nodes connected to the network don’t have access to the same clock frequency if it is not provided in some other way. If two nodes have different clock frequency, the receiver’s buffer will eventually overflow or starve. While not being a severe problem for telephony, devices used for data transmission, e.g. modems and fax will not be able to function properly. To avoid this it is necessary to synchronize the nodes.

This thesis investigates methods to synchronize nodes connected over Ethernet by simulating them in Matlab. The simulations show that under certain circumstances it is possible to produce a clock signal conforming to relevant standards.

Place, publisher, year, edition, pages
Institutionen för systemteknik , 2005. , 79 p.
Keyword [en]
Synchronization, phase-locked loops, clock recovery, telephony over IP
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:liu:diva-3764ISRN: LITH-ISY-EX--05/3666--SEOAI: oai:DiVA.org:liu-3764DiVA: diva2:20445
Uppsok
teknik
Supervisors
Examiners
Available from: 2005-10-20 Created: 2005-10-20

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf