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

[Leopoldo Iglesia]

Why udptl???

Leopoldo iglesia 

> El 20/06/2014, a las 14:09, Daniel Grotti <dgrotti at sipwise.com>  escribió:
> 
> Hi,
> If you want to discard all INVITEs with T38, you can try to add something like that in your /etc/ngcp-config/templates/etc/kamailio/proxy/proxy.cfg.customtt.tt2:
> 
> 
> if(is_method("INVITE") && search_body("udptl"))
> {
>    sl_send_reply("488", "Not Acceptable Here");
>    exit;
> }
> 
> before to send the invite to ROUTE_INVITE.
> Then run "ngcpcfg apply".
> 
> So, each INVITE/REINVITE with udpl in their body will be discarded.
> 
> 
> Daniel
> 
> 
> 
> 
>> On 06/20/2014 01:35 PM, Daniel Grotti wrote:
>> 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 >>> >>> _______________________________________________ >>> Spce-user mailing list >>> Spce-user at lists.sipwise.com >>> http://lists.sipwise.com/listinfo/spce-user >> >> _______________________________________________ >> Spce-user mailing list >> Spce-user at lists.sipwise.com >> http://lists.sipwise.com/listinfo/spce-user > > 
>>>>> 
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>>>>> 
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>>>> 
>>>> 
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