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We have a client set up with an Elastix 2.5 install running Asterisk 11 and 2.11 using Aastra 6731i IP phones.

The client would like to have the feature where all internal calls use a distinctive ring (alert-info) so it sounds different than incoming external calls and they want it to check if the extension being called is on another call. If they are on another call, the client would like an audio message to be played telling them that extension is on another call, but continue to ring (as call waiting is enabled on all extensions).


Example: Extension 1002 is on a call with a vendor. Extension 1001 dials extension 1002 and gets Bellcore-dr3 instead of Bellcore-dr1 followed by an audio file stating “this person is currently on another call”. The phone continues to ring and goes to their busy message at which time extension 1001 leaves a voice message for extension 1002.


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David Shauger (dave@sollos.com)
Vice President

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I would let the phone handle the different ring tones, if possible. For my phones a SIPAddHeader
with something like "Alert-Info: <http://127.0.0.1/Ringer3>" does the trick, but the syntax
might be vendor specific. The other problem should be taken care of with call queues.

jg

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