Hello,
According to RFC 4733 which obsoletes RFC 2833, line events are
deprecated (RFC 4733, pg 47). I agree preferring SIP for PSTN - VoIP
bridging, especially for the cases where line events to be handled. A
good reason for preferring SIP could be that line events are generally
needed for
Hi
I wanted to understand when is SIT (Special Information Tone) played?
Is this the error tone for BAd/Non-Existing number?
Can anyone point me to relevant RFC?
Regards
Hari
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Hari,
Yes, an example of where a SIT tone is used on the PSTN would be when
the caller has dialed a bad or non-existing number.
The SIT tone is generally played on the PSTN before a failure
announcement.
ITU recommendation E.182 defines tones that should be heard by the
caller in various
