[asterisk-users] PJSIP, DAHDI and Fanvil phones

Carlos Chavez cursor at telecomabmex.com
Mon Aug 15 15:01:11 CDT 2016

     I am having a problem with Fanvil phones (X3) when they make a call 
through DAHDI.  Pure SIP calls flow normally but when a call goes 
through a DANDHI interface to the PSTN we only get one way audio.  This 
is Asterisk 13.10.0 (bundled pjsip) and Dahdi 2.11.1 with an Openvox 
A400 card (4 port FXO).  We also have Aastra phones and those do not 
have any problem making callsto the PSTN.  All phones are on the 
internal network and there is no NAT.  If I configure a SIP trunk to 
PSTN audio works both ways, only when going through dahdi do we lose audio.

     I have never used Fanvil before today so I really do not know their 
best configuration settings for Asterisk.  Has anyone experienced this 
problem with Fanvil phones?  Any recommendations?  A SIP debug show 
proper invites and the correct IP for both phone and Asterisk, RTP flows 
both ways between Asterisk and the phone but only outgoing audio (from 
phone) is heard and there is no incoming (from pstn).

Telecomunicaciones Abiertas de México S.A. de C.V.
Carlos Chávez
+52 (55)9116-91161

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