Hi,

It is definitely not a Fax. The guys, who are calling us from this number, are actually complaining that we are not reachable. But when we call them back the voice call perfectly works. Other Inbound calls are no problem.

Best regards,
Paul

Am Mi., 22. Aug. 2018 um 21:53 Uhr schrieb Vallimamod Abdullah <vma@vallimamod.org>:

Hi,

When there is udptl media type in sdp, freeswitch ignores the audio type. That's why you are getting the codec error (if you don't have t38 enabled.)

The caller looks like a fax machine, which explains why you get a direct t38 request and not a reinvite.

Best Regards,

-- 
Vallimamod Abdullah

SIP Solutions

vma@sip.solutions

linkedin.com/in/vallimamod
.

On 22 Aug 2018, at 15:55, Paul Muaddib <paul.muaddib83@gmail.com> wrote:

vars.xml

  <X-PRE-PROCESS cmd="set" data="global_codec_prefs=PCMA,PCMU"/>
  <X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=PCMA,PCMU"/>

My phones, all Grandstream GXP2140, accept PCMA and PCMU

I don't have trouble with other people calling me

Am Mi., 22. Aug. 2018 um 15:21 Uhr schrieb Thorsten Göllner <tg-maillistings@level5.de>:

Only PCMA@8000 is offered. Check device if codec is activated.

Am 21.08.2018 um 15:06 schrieb Paul Muaddib:

Hi,

I have a rarely error where I get this failure message in the log file. I am bit wondering because this is suposed to be a normal voice call and not a fax.

Best regards,

Paul.

fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 2018-08-20 14:04:54.056776 [INFO] switch_ivr_originate.c:1215 Sending early media
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 2018-08-20 14:04:54.056776 [ERR] mod_sofia.c:2343 CODEC NEGOTIATION ERROR.  SDP:
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 v=0^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 o=- 20012711 20012711 IN IP4 217.0.15.67^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 s=on transit^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 c=IN IP4 X.X.X.X^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 t=0 0^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 m=audio 13274 RTP/AVP 8 118 126 101^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=rtpmap:8 PCMA/8000^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=rtpmap:118 PCMA/8000^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=rtpmap:126 CLEARMODE/8000^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=rtpmap:101 telephone-event/8000^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=fmtp:101 0-15^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=gpmd:118 vbd=yes^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=ptime:20^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 m=image 11232 udptl t38^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=T38FaxVersion:0^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=T38MaxBitRate:14400^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=T38FaxMaxBuffer:3000^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=T38FaxMaxDatagram:500^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=T38FaxRateManagement:transferredTCF^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 a=T38FaxUdpEC:t38UDPRedundancy^M
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28
fe3eed7c-e03a-40af-bc2e-ae0bfe54bb28 2018-08-20 14:04:54.056776 [NOTICE] switch_channel.c:3515 Hangup sofia/external/+49XXXXXXXXX@sip-trunk.telekom.de [CS_EXECUTE] [INCOMPATIBLE_DESTINATION]

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