Hi Paul,<br><br><div><span class="gmail_quote">2007/11/23, Paul Hayes <<a href="mailto:paul@provu.co.uk">paul@provu.co.uk</a>>:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Robert Lister wrote:<br>> Hello,<br>><br>> I think I have encountered an odd bug in Siemens C460 IP/dect handsets,<br>> which is a bit annoying, and I'm not (yet) sure how to get round it without<br>> lots of hacks.
<br>><br>> Basically, on all external incoming calls, we set:<br>><br>> exten => s,n,SIPAddHeader(Alert-Info: Bellcore-dr2)<br>><br>> This causes handsets (i.e. Cisco 7960 / Grandstream / aastra) to set a
<br>> different ring cadence so to differentiate between external and internal<br>> calls.<br>><br>> Other handsets that do not support Alert-Info: just ignore the presence<br>> of this header.<br>><br>> When this header is set in a call to the C460 IP, it does not alert, in fact
<br>> it does not respond to any INVITE requests; asterisk just retries the<br>> requests a few times and then gives up.<br>><br>> Anyone able to reproduce? I have firmware version 010700000000 / 041.00<br>>
<br>> I suppose as a workaround I could add an astDB entry for these extensions,<br>> and a bit of logic in the dialplan to tell asterisk not to add the header<br>> for extensions that have that flag set.<br>>
<br>><br>> Regards,<br>><br>><br>><br>> Rob<br>><br>><br><br>I can replicate this behaviour too using an S450IP when an Alert-Info<br>header is present. I have reported the issue to Siemens so hopefully
<br>this will be fixed in a firmware update in the near future.<br><br>cheers,<br>Paul.<br><br>_______________________________________________<br>--Bandwidth and Colocation Provided by <a href="http://www.api-digital.com--">
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</a><br></blockquote></div><br>Could you get from Siemens some kind of commitment to fully support Alert-Info or at least, to ignore Alert-Info data in incoming INVITEs ?<br><br>Regards<br>