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

Fri Jun 20 10:10:42 EDT 2014

The kamailio proxy log says this, when endponint tries to negotiate as 
fax, when it´s voice call

Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO: <script>: Setting 
PPI to '<sip:984099520 at 154.58.3.135>' - R=sip:x1008 at 154.58.3.159:5060 
ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO: <script>: Prepare 
Diversion setting - R=sip:x1008 at 154.58.3.159:5060 ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO: <script>: No 
selector set, not setting CLI - R=sip:x1008 at 154.58.3.159:5060 
ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO: <script>: Prepare 
History-Info setting - R=sip:x1008 at 154.58.3.159:5060 ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO: <script>: No 
selector set, not setting CLI - R=sip:x1008 at 154.58.3.159:5060 
ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO: <script>: Applying 
callee-out domain rewrite rules using dpid '4' - 
R=sip:x1008 at 154.58.3.159:5060 ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO: <script>: No 
matching rewrite rules for 'x1008' found - R=sip:x1008 at 154.58.3.159:5060 
ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO: <script>: Setting 
P-Called-Party-ID '<sip:x1008 at 154.58.3.135>' - 
R=sip:x1008 at 154.58.3.159:5060 ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO: <script>: Writing 
sbc parameters ;aleg_sst_enable=no;sst_enable=no - 
R=sip:x1008 at 154.58.3.159:5060 ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO: <script>: 
Appending P-D-URI 'sip:lb at 127.0.0.1;lr;socket='sip:154.58.3.135:5060'' - 
R=sip:x1008 at 154.58.3.159:5060 ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO: <script>: Forcing 
request via B2BUA 'sip:127.0.0.1:5080' - R=sip:x1008 at 154.58.3.159:5060 
ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2391]: INFO: <script>: Request 
leaving server, D-URI='sip:127.0.0.1:5080' - 
R=sip:x1008 at 154.58.3.159:5060 ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2403]: INFO: <script>: 
NAT-Reply - S=100 - Connecting M=INVITE IP=154.58.3.158:5060 
(127.0.0.1:5080) ID=15059 at 154.58.3.158
Jun 19 10:36:43 SIPSW /usr/sbin/kamailio[2395]: INFO: <script>: 
NAT-Reply - S=180 - Ringing M=INVITE IP=154.58.3.158:5060 
(127.0.0.1:5080) ID=15059 at 154.58.3.158
Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2399]: INFO: <script>: New 
request - M=CANCEL R=sip:984099519 at 154.58.3.135 F=sip:x1009 at 154.58.3.135 
T=sip:984099519 at 154.58.3.135 IP=154.58.3.158:5060 (127.0.0.1:5060) 
ID=15059 at 154.58.3.158
Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2399]: INFO: <script>: Stop 
mediaproxy for current branch using first Via - 
R=sip:984099519 at 154.58.3.135 ID=15059 at 154.58.3.158
Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2399]: ERROR: rtpproxy-ng 
[rtpproxy.c:1348]: proxy replied with error: Call-ID not found or tags 
didn't match
Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2399]: INFO: <script>: Request 
leaving server via local route - R=sip:984099519 at 154.58.3.135 
ID=15059 at 154.58.3.158
Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2393]: INFO: <script>: 
NAT-Reply - S=487 - Request terminated M=INVITE IP=154.58.3.158:5060 
(127.0.0.1:5080) ID=15059 at 154.58.3.158
Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2393]: INFO: <script>: Failure 
route for local call - R=sip:984099519 at 154.58.3.135 ID=15059 at 154.58.3.158
Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2393]: INFO: <script>: Stop 
mediaproxy for current branch using first Via - 
R=sip:984099519 at 154.58.3.135 ID=15059 at 154.58.3.158
Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2393]: ERROR: rtpproxy-ng 
[rtpproxy.c:1348]: proxy replied with error: Call-ID not found or tags 
didn't match
Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2393]: INFO: <script>: Final 
reply - R=sip:984099519 at 154.58.3.135 ID=15059 at 154.58.3.158
Jun 19 10:36:52 SIPSW /usr/sbin/kamailio[2401]: INFO: <script>: New 
request - M=ACK R=sip:984099519 at 154.58.3.135 F=sip:x1009 at 154.58.3.135 
T=sip:984099519 at 154.58.3.135 IP=154.58.3.158:5060 (127.0.0.1:5060) 
ID=15059 at 154.58.3.158


El 20/06/2014 13:54, Leopoldo Iglesia escribió:
> Ok. "has_totag" where is located ??
>
> El 20/06/2014 13:35, Daniel Grotti escribió:
>> 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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