Architecture of Internet telephony software, `VocaLink-Soft'

Dai Ando*, Toru Sakatani, Hiroshi Watanabe, Yasuhito Hayashi, Hiroshi Koyano

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


With the recent rapid growth of the Internet, there has arisen demand for real-time voice communication, i.e., Internet Telephony. However, the Internet is not suitable for real-time communication, because it does not guarantee bitrate or routing. This paper describes the technical problems of real-time communication on the Internet and describes NTT's Internet Telephony Software `VocaLink-Soft'. It also describes directory server software `Vocalink-DSV', which enables users to use `VocaLink-Soft' even if they do not know the destination PC's IP address.

Original languageEnglish
Pages (from-to)85-92
Number of pages8
JournalNTT R and D
Issue number9
Publication statusPublished - 1997
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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