asterisk users - Mar 2009 - distictive Ringing in SIP

Hi all,

I want to configure a SIP Channel to send Alert-Info with the INVITE. Right
now I have added an extension like so:

exten=>4444,n(ring5),SIPAddHeader("Alert-Info: R0")

But there is no Alert-Info in the INVITE.

Any idea how I can get this working? Seems a very basic error..

Thanks.

Sandip
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I'm using

    exten => s,42,SIPAddHeader(Alert-Info: info=<Bellcore-r2>)

and it works just fine.
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