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- Freeswitch responds after the reinvite to T38 with:
- SIP/2.0 488 Not Acceptable Here.
- Via: SIP/2.0/UDP 10.255.3.100:5060;branch=z9hG4bK-00104-Elh75avx0E4AG5U-0.
- From: "Anonymous" <sip:Anonymous@10.255.3.100:5060>;tag=Elh75avx0E4AG5U-IPTrunk-623-19-17at10.255.3.100.
- To: <sip:9728961080@10.252.3.11:5060>;tag=cg7Dg06ZXSZ6H.
- Call-ID: Elh75avx0E4AG5U@10.255.3.100.
- CSeq: 104 INVITE.
- User-Agent: FreeSWITCH-mod_sofia/1.6.14+git~20170209T234209Z~de2936af46~64bit.
- Accept: application/sdp.
- Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY.
- Supported: timer, path, replaces.
- Content-Length: 0.
- dialplan:
- <action application="answer" />
- <action application="playback" data="silence_stream://2000"/>
- <action application="set" data="fax_enable_t38=true"/>
- <action application="rxfax" data="/tmp/FAX-${uuid}.tif"/>
- <action application="hangup"/>
- spandsp.conf
- <fax-settings>
- <param name="use-ecm" value="true"/>
- <param name="verbose" value="true"/>
- <param name="disable-v17" value="false"/>
- <param name="ident" value="SpanDSP Fax Ident"/>
- <param name="header" value="SpanDSP Fax Header"/>
- <param name="spool-dir" value="/tmp"/>
- <param name="file-prefix" value="faxrx"/>
- </fax-settings>
- freeswitch.log shows:
- 4b17c550-ef4b-11e6-8931-95b3e9bcbe5b 2017-02-09 22:42:15.398075 [DEBUG] switch_core_media.c:3985 sofia/external/Anonymous@10.255.3.100:5060 T38 ACCEPT on request
- 4b17c550-ef4b-11e6-8931-95b3e9bcbe5b 2017-02-09 22:42:15.398075 [DEBUG] switch_core_media.c:4090 sofia/external/Anonymous@10.255.3.100:5060 T38 IS NOT POSSIBLE on request
- 4b17c550-ef4b-11e6-8931-95b3e9bcbe5b 2017-02-09 22:42:15.398075 [DEBUG] sofia.c:7950 Reinvite resulted in codec negotiation failure.
- 4b17c550-ef4b-11e6-8931-95b3e9bcbe5b 2017-02-09 22:42:15.398075 [DEBUG] sofia.c:7035 Channel sofia/external/Anonymous@10.255.3.100:5060 skipping state [ready][488]
- 4b17c550-ef4b-11e6-8931-95b3e9bcbe5b 2017-02-09 22:42:15.418078 [DEBUG] sofia.c:7042 Channel sofia/external/Anonymous@10.255.3.100:5060 entering state [received][100]
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