[asterisk-users] Youmail RDNIS
karlfife at gmail.com
Wed Aug 11 16:54:46 CDT 2010
Does anyone know the mechanism by which companies like YouMail (and MNO's
using their own voicemail system) are able to redirect ALL calls from a ALL
subscribers to *just one* voicemail DID, yet determine WHICH subscriber did
I had always assumed this was simply done using RDNIS. In other words, the
original calling party's CallerID is passed with the redirected call, (and I
assumed) the redirecting subscriber's number was passed via RDNIS--thusly
the voicemail system knows to place the call into the voicemail account
belonging to the RDNIS value.
In practice I find that YouMail, when presented with a redirected call as
described above ignores the RDNIS value and prompts me for an subscriber
account number. By contrast, when various MNO's do the redirection, YouMail
is able to determine the redirecting subscriber account number--presumably
some other way.
Does anyone know the mechanism(s) by which this is normally done? Is there
even a 'normal' way to do this (such as a QSIG call transfer message), or is
truly home-spun and carrier-specific, such as a Q.931 facility message. Any
advice on the subject would be much appreciated!
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