[Spce-user] Fwd: Re: Blacklist t.38 fax codec

[Daniel Grotti]

I have nothing ready to give you right now.
Basically on kamailio proxy you should match a Re-invite (using the
"has_totag") and check if SDP contains t38 headers/codec (just have a
look how the T38 reinvite looks like).
So, if you receive a re-invite with T38 headers into SDP, just send back
a 488 reply.

Daniel





On 06/20/2014 01:28 PM, Leopoldo Iglesia wrote:
> Fine, how can I do this hack? cause endpoints is impossible to mod
> config, so they are rented and provisioned by an ftth operator.
>
> El 20/06/2014 13:23, Daniel Grotti escribió:
>> Hi,
>> I think you need to avoid to forward the T38 Re-INVITE, so you should
>> hack your SPCE in order to reply to the T38 re-invite with a "488 Not
>> acceptable here", for example.
>> So the sender SHOULD fallback to G711.
>> Anyway, the best solution if you have endpoint with t38 enabled but
>> they don't work well, is to disable t38.
>>
>>
>> Daniel
>>
>>
>>
>> On 06/20/2014 01:15 PM, Leopoldo Iglesia wrote:
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>>> > But both endpoints support it, that is the problem and the only >
>>> scenario when it fails, so i want SPCE not to send Fax negotiation
>>> to > endpoint,.
>>>
>>>
>>>
>>>  El 20/06/2014 12:12, Daniel Grotti escribió: >> Hi, >> that's
>>> strange, if one of the endpoints try to switch to t38 and the >>
>>> other endpoint doesn't support it, they should fallback to G711. >>
>>> >> Daniel >> >> >> >> >> >> >> On 06/20/2014 01:33 AM, Leopoldo
>>> Iglesia wrote: >>> How can I, blacklist t.38 to avoid endpoints to
>>> try t38 negotiation? >>> >>> When i call from ericcson ont to fax
>>> capable endpoint, it try to >>> connect t38 fax and There is no
>>> voice. >>> >>> Thanks >>> >>> Leopoldo iglesia >>> >>>
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