No subject

{quote}
AOC in chan_sip
Asterisk supports a very basic way of sending AOC on a SIP channel to Snom phones using an AOC specification designed by Snom. This support is limited to the sending of AOC-D and AOC-E pass-through messages. 
{quote}

Since we don't support the content in the MESSAGE request sent to us, a 415 is an appropriate response. The fact that the Huawei switch then tears down the call seems sub-optimal, given how 415 responses should typically be handled.

I'm curious, why is the Huawei switch sending AOC messages in the first place?
                
> Fake acceptance of AOC MESSAGEs
> -------------------------------
>
>                 Key: ASTERISK-22183
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-22183
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/Interoperability
>    Affects Versions: SVN, 11.5.0
>         Environment: Using a telco with Huawei style AOC support.
>            Reporter: Birger "WIMPy" Harzenetter
>            Severity: Critical
>         Attachments: sip-asn1-aoc.patch
>
>
> Reception of AOC via MESSSAGE with content type ASN1/aoc makes Asterisk reply with "415 Unsupported Media Type" which again makes the ITSP (telco) drop the call.
> This patch "fakes" an accepted response.
> Would be nice if the message would actually get processed, but at least the calls are no longer dropped.

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