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Subscribe and Notify Signals in SIP

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nsmaddict

nsmaddict

Technical User
Joined
Sep 6, 2004
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10
Location
IN
Hi All,

This is a query related to the Subscribe and Notify signals in SIP.I know that these signals are irrespective to a call.But then there is a call-ID while decoding for this signal.

1.Can anyone tell me when this signal or message comes into the picture?

2. Importance of these two signal?

3. Does these signals originate anytime during the call?

4. What are the main purpose and function of these signals?

I am waiting for a detail answer related to these signals.

Reg,
Neelima
 
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