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

[Leopoldo Iglesia]

When i try to use sdops commands, it returns command not found, maybe 
module not loaded

I use sipwise 2.8 ...

  0(18441) ERROR: <core> [cfg.y:3410]: cfg. parser: failed to find 
command sdp_keep_codecs_by_name
  0(18441) : <core> [cfg.y:3549]: parse error in config file 
/etc/kamailio/proxy/proxy.cfg, line 308, column 36: unknown command, 
missing loadmodule?




El 26/06/2014 10:44, Daniel Grotti escribió:
> Ok,
> What client is that which is not support T38 negotiation.
> Sorry, but you have to fix a client issue on server side, this is 
> something awkward.
>
> So you should remove that T38 codecs then.
> The following module may help:
>
> http://kamailio.org/docs/modules/4.0.x/modules/sdpops.html
>
> Try to have a look at this.
>
> Daniel
>
>
>
> On 06/26/2014 10:18 AM, Leopoldo Iglesia wrote:
>> When the proxy answer the 488, next packet is other invite.. and no more.
>>
>> The problem is that the SDP packet comes withh all codecs like this
>>
>>
>>
>> El 20/06/2014 14:09, Daniel Grotti 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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