[SIPForum-discussion] How SIP call can be diffrentiated based on Class4 and Class5 switch calls

Kshitij Bhushan nikku12982 at gmail.com
Tue Dec 1 12:00:41 UTC 2009

Hi All,

One basic question?

How we are distinguishing the class4 and class5 switch call in SIP?Is
through NOA or some access layer or something else.

Pls reply!!!!

Thanks in advance.
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