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EventHelix Update June 2002

Recent Updates to EventHelix.com.

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Telnet Sequence Diagram pdf

This sequence diagram describes the setup of a telnet session between the host and server machines. The login sequence and the option handshake are covered in detail.

Telnet server is designed to handle multiple telnet sessions. Thus when a telnet connection request is received, it creates a thread to handle the individual telnet session. This way the telnet server is free to listen to port 23 for more telnet requests...

Message Factory and Message Interface Design Pattern

Distributed systems involve several communicating processors. The interfaces between these processors are often governed by interface documents and standard header files. The main objective of the Message Interface Design Pattern is to decouple the software from its external interfaces. This pattern also allows for a smoother role out of interface by maintaining backward compatibility.

V5.2 Originated and V5.2 Terminated Voice Call Setup (DTMF Dialing, Called Subscriber Clears First) pdf

This message sequence chart describes the setup and release of a V5.2 to V5.2 subscriber call with the following characteristics:

  • Originating subscriber uses DTMF (Dual tone multi frequency) dialing
  • Call is routed successfully
  • Called Subscriber Answers
  • Called Subscriber Clears First

V5.2 Originated and V5.2 Terminated Voice Call Setup (Pulse Dialing, Calling Subscriber Clears First) pdf

This message sequence chart describes the setup and release of a V5.2 to V5.2 subscriber call with the following characteristics:

  • Originating subscriber uses Pulse dialing (Rotary phone)
  • Call is routed successfully
  • Called Subscriber Answers
  • Calling Subscriber Clears First

-- EventHelix.com Team

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