Preventing Generation of Unique Call-ID and Modifying Dialog Tags
Question
You want to prevent the Session Border Controller from generating a unique Call-ID and from modifying the dialog tags.
How would you accomplish this?
Answers
Explanations
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A. B. C. D. E.E.
Reference - http://luccisun.webfactional.com/sbc/SBC/NNSBCNOTE.html.
In SIP (Session Initiation Protocol), a unique Call-ID is generated for each new session, which identifies the session during its lifetime. Dialog tags, on the other hand, are used to identify individual dialogs between User Agents. By default, the Oracle Communications Session Border Controller (SBC) generates a unique Call-ID for each session and modifies the dialog tags as needed to ensure proper routing.
To prevent the SBC from generating a unique Call-ID and from modifying the dialog tags, you would need to disable the relevant parameters in the SIP configuration.
Option A, "Navigate to the sip-interface configuration element and set the dialog-transparency parameter to disabled," is incorrect because the dialog-transparency parameter is used to enable/disable the SBC's ability to transparently relay dialog messages, which is not related to preventing the SBC from generating a unique Call-ID or modifying dialog tags.
Option B, "Navigate to the sip-config configuration element and set the dialog-mapping parameter to disabled," is also incorrect because the dialog-mapping parameter is used to enable/disable the SBC's ability to map dialog tags from one side of the network to the other, which is not related to preventing the SBC from generating a unique Call-ID or modifying dialog tags.
Option C, "Navigate to the sip-config configuration element and set the call-id-transparency parameter to disabled," is incorrect because the call-id-transparency parameter is used to enable/disable the SBC's ability to transparently relay Call-ID messages, which is not related to preventing the SBC from generating a unique Call-ID or modifying dialog tags.
Option D, "Navigate to the sip-config configuration element and set the dialog-transparency parameter to disabled," is also incorrect because, as stated earlier, the dialog-transparency parameter is used to enable/disable the SBC's ability to transparently relay dialog messages, which is not related to preventing the SBC from generating a unique Call-ID or modifying dialog tags.
Therefore, the correct answer is Option E, "Navigate to the sip-config configuration element and set the dialog-transparency parameter to enabled." This option is the only one that correctly addresses the requirement of preventing the SBC from generating a unique Call-ID and from modifying the dialog tags. By setting the dialog-transparency parameter to enabled, the SBC will not modify the dialog tags and will forward them as received from the User Agents. Similarly, the SBC will not generate a unique Call-ID for each session and will forward the Call-ID received from the User Agents.
