Re: [asterisk-users] Odd bug in Siemens C460IP ?

Hi Paul,

2007/11/23, Paul Hayes <paul@provu.co.uk>:

Robert Lister wrote:
> Hello,
>
> I think I have encountered an odd bug in Siemens C460 IP/dect handsets,
> which is a bit annoying, and I'm not (yet) sure how to get round it without
> lots of hacks.
>
> Basically, on all external incoming calls, we set:
>
> exten => s,n,SIPAddHeader(Alert-Info: Bellcore-dr2)
>
> This causes handsets (i.e. Cisco 7960 / Grandstream / aastra) to set a
> different ring cadence so to differentiate between external and internal
> calls.
>
> Other handsets that do not support Alert-Info: just ignore the presence
> of this header.
>
> When this header is set in a call to the C460 IP, it does not alert, in fact
> it does not respond to any INVITE requests; asterisk just retries the
> requests a few times and then gives up.
>
> Anyone able to reproduce?  I have firmware version 010700000000 / 041.00
>
> I suppose as a workaround I could add an astDB entry for these extensions,
> and a bit of logic in the dialplan to tell asterisk not to add the header
> for extensions that have that flag set.
>
>
> Regards,
>
>
>
> Rob
>
>

I can replicate this behaviour too using an S450IP when an Alert-Info
header is present.  I have reported the issue to Siemens so hopefully
this will be fixed in a firmware update in the near future.

cheers,
Paul.

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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 ?

Regards