From the telephone to the SIP : Example of a call between a VoIP phone and a conventional phone

Example of a call between a VoIP phone and a conventional phone
From the telephone to the SIP

Author : Philippe MARTINS

Publication date: May 10, 2008 | Lire en français

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5. Example of a call between a VoIP phone and a conventional phone

This section analyzes traces taken from a real network. SIP addresses and fields have been anonymized.

5.1 User registration

SIP user registration is described in table 1 . The user whose URI is [email protected] first registers by sending a REGISTER message (message no. 1). In the contact field, this message indicates the IP address and listening port number of the terminal hosting the UAC function (<0123456789>0123456789>

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Example of a call between a VoIP phone and a conventional phone